/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/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 07:48:46,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 07:48:46,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 07:48:46,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 07:48:46,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 07:48:46,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 07:48:46,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 07:48:46,652 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 07:48:46,657 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 07:48:46,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 07:48:46,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 07:48:46,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 07:48:46,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 07:48:46,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 07:48:46,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 07:48:46,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 07:48:46,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 07:48:46,659 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 07:48:46,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 07:48:46,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 07:48:46,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 07:48:46,659 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 07:48:46,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 07:48:46,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 07:48:46,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 07:48:46,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 07:48:46,660 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 07:48:46,660 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 07:48:46,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 07:48:46,660 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 07:48:46,660 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 07:48:46,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 07:48:46,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 07:48:46,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 07:48:46,848 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 07:48:46,850 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 07:48:46,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2022-03-19 07:48:46,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c36ce97d6/b5dceae4821c4b1f844b639f05b9f04f/FLAG36e5ab71b [2022-03-19 07:48:47,251 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 07:48:47,252 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2022-03-19 07:48:47,256 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c36ce97d6/b5dceae4821c4b1f844b639f05b9f04f/FLAG36e5ab71b [2022-03-19 07:48:47,264 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c36ce97d6/b5dceae4821c4b1f844b639f05b9f04f [2022-03-19 07:48:47,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 07:48:47,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 07:48:47,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 07:48:47,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 07:48:47,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 07:48:47,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 07:48:47" (1/1) ... [2022-03-19 07:48:47,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f1cd6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:48:47, skipping insertion in model container [2022-03-19 07:48:47,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 07:48:47" (1/1) ... [2022-03-19 07:48:47,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 07:48:47,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 07:48:47,509 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2022-03-19 07:48:47,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 07:48:47,533 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 07:48:47,556 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2022-03-19 07:48:47,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 07:48:47,570 INFO L208 MainTranslator]: Completed translation [2022-03-19 07:48:47,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:48:47 WrapperNode [2022-03-19 07:48:47,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 07:48:47,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 07:48:47,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 07:48:47,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 07:48:47,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:48:47" (1/1) ... [2022-03-19 07:48:47,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:48:47" (1/1) ... [2022-03-19 07:48:47,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:48:47" (1/1) ... [2022-03-19 07:48:47,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:48:47" (1/1) ... [2022-03-19 07:48:47,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:48:47" (1/1) ... [2022-03-19 07:48:47,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:48:47" (1/1) ... [2022-03-19 07:48:47,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:48:47" (1/1) ... [2022-03-19 07:48:47,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 07:48:47,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 07:48:47,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 07:48:47,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 07:48:47,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:48:47" (1/1) ... [2022-03-19 07:48:47,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 07:48:47,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:48:47,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 07:48:47,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 07:48:47,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 07:48:47,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 07:48:47,657 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 07:48:47,657 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 07:48:47,657 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 07:48:47,657 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 07:48:47,657 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 07:48:47,657 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 07:48:47,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 07:48:47,657 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 07:48:47,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 07:48:47,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 07:48:47,658 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 07:48:47,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 07:48:47,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 07:48:47,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 07:48:47,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 07:48:47,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 07:48:47,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 07:48:47,698 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 07:48:47,699 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 07:48:47,814 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 07:48:47,819 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 07:48:47,819 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-19 07:48:47,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 07:48:47 BoogieIcfgContainer [2022-03-19 07:48:47,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 07:48:47,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 07:48:47,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 07:48:47,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 07:48:47,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 07:48:47" (1/3) ... [2022-03-19 07:48:47,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f0f306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 07:48:47, skipping insertion in model container [2022-03-19 07:48:47,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:48:47" (2/3) ... [2022-03-19 07:48:47,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f0f306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 07:48:47, skipping insertion in model container [2022-03-19 07:48:47,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 07:48:47" (3/3) ... [2022-03-19 07:48:47,829 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2022-03-19 07:48:47,832 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 07:48:47,832 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 07:48:47,857 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 07:48:47,861 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 07:48:47,861 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 07:48:47,870 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 28 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 07:48:47,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 07:48:47,875 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:47,875 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:47,876 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:47,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:47,879 INFO L85 PathProgramCache]: Analyzing trace with hash 66787427, now seen corresponding path program 1 times [2022-03-19 07:48:47,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:47,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1006354200] [2022-03-19 07:48:47,905 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:47,905 INFO L85 PathProgramCache]: Analyzing trace with hash 66787427, now seen corresponding path program 2 times [2022-03-19 07:48:47,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:47,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849526889] [2022-03-19 07:48:47,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:47,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:48,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:48,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:48,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849526889] [2022-03-19 07:48:48,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849526889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:48,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:48,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 07:48:48,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:48,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1006354200] [2022-03-19 07:48:48,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1006354200] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:48,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:48,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 07:48:48,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276485344] [2022-03-19 07:48:48,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:48,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 07:48:48,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:48,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 07:48:48,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 07:48:48,167 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 28 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:48,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:48,304 INFO L93 Difference]: Finished difference Result 60 states and 98 transitions. [2022-03-19 07:48:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 07:48:48,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 07:48:48,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:48,313 INFO L225 Difference]: With dead ends: 60 [2022-03-19 07:48:48,313 INFO L226 Difference]: Without dead ends: 29 [2022-03-19 07:48:48,315 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-19 07:48:48,318 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 39 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:48,319 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 46 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:48:48,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-19 07:48:48,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-19 07:48:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:48,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-03-19 07:48:48,353 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 27 [2022-03-19 07:48:48,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:48,354 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-03-19 07:48:48,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:48,354 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-03-19 07:48:48,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 07:48:48,355 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:48,355 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:48,356 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 07:48:48,358 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:48,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:48,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1388086372, now seen corresponding path program 1 times [2022-03-19 07:48:48,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:48,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060976294] [2022-03-19 07:48:48,367 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:48,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1388086372, now seen corresponding path program 2 times [2022-03-19 07:48:48,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:48,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737236828] [2022-03-19 07:48:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:48,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:48,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:48,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:48,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737236828] [2022-03-19 07:48:48,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737236828] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:48,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:48,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:48:48,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:48,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060976294] [2022-03-19 07:48:48,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060976294] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:48,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:48,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:48:48,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447260972] [2022-03-19 07:48:48,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:48,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 07:48:48,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:48,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 07:48:48,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 07:48:48,444 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:48,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:48,529 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2022-03-19 07:48:48,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 07:48:48,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 07:48:48,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:48,530 INFO L225 Difference]: With dead ends: 58 [2022-03-19 07:48:48,530 INFO L226 Difference]: Without dead ends: 43 [2022-03-19 07:48:48,531 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 07:48:48,532 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:48,532 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 29 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:48:48,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-19 07:48:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-19 07:48:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-03-19 07:48:48,544 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 27 [2022-03-19 07:48:48,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:48,545 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-03-19 07:48:48,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-03-19 07:48:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 07:48:48,546 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:48,546 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:48,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 07:48:48,546 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:48,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2120308874, now seen corresponding path program 1 times [2022-03-19 07:48:48,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:48,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1740095981] [2022-03-19 07:48:48,548 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:48,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2120308874, now seen corresponding path program 2 times [2022-03-19 07:48:48,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:48,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729676734] [2022-03-19 07:48:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:48,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:48,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:48,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:48,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729676734] [2022-03-19 07:48:48,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729676734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:48,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:48,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 07:48:48,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:48,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1740095981] [2022-03-19 07:48:48,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1740095981] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:48,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:48,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 07:48:48,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977893429] [2022-03-19 07:48:48,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:48,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 07:48:48,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:48,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 07:48:48,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 07:48:48,600 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:48,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:48,726 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2022-03-19 07:48:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 07:48:48,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 07:48:48,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:48,731 INFO L225 Difference]: With dead ends: 58 [2022-03-19 07:48:48,731 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 07:48:48,731 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-19 07:48:48,732 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:48,732 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:48:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 07:48:48,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-19 07:48:48,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-19 07:48:48,738 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 27 [2022-03-19 07:48:48,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:48,738 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-19 07:48:48,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-19 07:48:48,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 07:48:48,739 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:48,739 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:48,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 07:48:48,739 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:48,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:48,740 INFO L85 PathProgramCache]: Analyzing trace with hash 80992202, now seen corresponding path program 1 times [2022-03-19 07:48:48,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:48,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [915216168] [2022-03-19 07:48:48,740 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:48,740 INFO L85 PathProgramCache]: Analyzing trace with hash 80992202, now seen corresponding path program 2 times [2022-03-19 07:48:48,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:48,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713191744] [2022-03-19 07:48:48,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:48,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:48,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:48,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:48,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713191744] [2022-03-19 07:48:48,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713191744] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:48,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:48,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 07:48:48,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:48,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [915216168] [2022-03-19 07:48:48,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [915216168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:48,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:48,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 07:48:48,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339082554] [2022-03-19 07:48:48,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:48,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 07:48:48,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:48,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 07:48:48,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-19 07:48:48,797 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:48,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:48,898 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-03-19 07:48:48,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 07:48:48,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 07:48:48,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:48,900 INFO L225 Difference]: With dead ends: 52 [2022-03-19 07:48:48,900 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 07:48:48,902 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-03-19 07:48:48,908 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:48,909 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 41 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:48:48,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 07:48:48,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-19 07:48:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:48,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-03-19 07:48:48,920 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-03-19 07:48:48,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:48,920 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-03-19 07:48:48,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:48,922 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-03-19 07:48:48,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 07:48:48,923 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:48,923 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:48,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 07:48:48,923 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:48,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:48,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2094273526, now seen corresponding path program 1 times [2022-03-19 07:48:48,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:48,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [746627489] [2022-03-19 07:48:48,927 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:48,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2094273526, now seen corresponding path program 2 times [2022-03-19 07:48:48,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:48,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468232559] [2022-03-19 07:48:48,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:48,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:49,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:49,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:49,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468232559] [2022-03-19 07:48:49,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468232559] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:49,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:49,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 07:48:49,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:49,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [746627489] [2022-03-19 07:48:49,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [746627489] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:49,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:49,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 07:48:49,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701527744] [2022-03-19 07:48:49,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:49,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 07:48:49,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:49,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 07:48:49,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-19 07:48:49,025 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:49,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:49,146 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-03-19 07:48:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 07:48:49,146 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 07:48:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:49,148 INFO L225 Difference]: With dead ends: 44 [2022-03-19 07:48:49,148 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 07:48:49,148 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-03-19 07:48:49,149 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:49,149 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:48:49,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 07:48:49,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 07:48:49,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-03-19 07:48:49,158 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 27 [2022-03-19 07:48:49,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:49,158 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-03-19 07:48:49,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:49,158 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-03-19 07:48:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 07:48:49,161 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:49,161 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:49,161 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 07:48:49,161 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:49,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:49,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2013335789, now seen corresponding path program 1 times [2022-03-19 07:48:49,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:49,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1804567980] [2022-03-19 07:48:49,162 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:49,162 INFO L85 PathProgramCache]: Analyzing trace with hash 2013335789, now seen corresponding path program 2 times [2022-03-19 07:48:49,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:49,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162786454] [2022-03-19 07:48:49,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:49,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:49,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:49,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:49,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162786454] [2022-03-19 07:48:49,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162786454] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:49,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:49,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:48:49,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:49,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1804567980] [2022-03-19 07:48:49,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1804567980] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:49,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:49,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:48:49,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214192831] [2022-03-19 07:48:49,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:49,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 07:48:49,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:49,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 07:48:49,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 07:48:49,224 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:49,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:49,268 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-03-19 07:48:49,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 07:48:49,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 07:48:49,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:49,269 INFO L225 Difference]: With dead ends: 36 [2022-03-19 07:48:49,269 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 07:48:49,269 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 07:48:49,270 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:49,271 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 16 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:48:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 07:48:49,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 07:48:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-03-19 07:48:49,280 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 27 [2022-03-19 07:48:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:49,281 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-03-19 07:48:49,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-03-19 07:48:49,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 07:48:49,281 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:49,281 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:49,281 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 07:48:49,281 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:49,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:49,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2013901818, now seen corresponding path program 1 times [2022-03-19 07:48:49,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:49,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [99115425] [2022-03-19 07:48:49,282 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:49,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2013901818, now seen corresponding path program 2 times [2022-03-19 07:48:49,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:49,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418601201] [2022-03-19 07:48:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:49,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:49,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:49,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:49,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418601201] [2022-03-19 07:48:49,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418601201] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:49,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:49,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 07:48:49,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:49,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [99115425] [2022-03-19 07:48:49,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [99115425] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:49,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:49,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 07:48:49,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746098085] [2022-03-19 07:48:49,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:49,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 07:48:49,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:49,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 07:48:49,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-03-19 07:48:49,388 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:49,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:49,504 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-03-19 07:48:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 07:48:49,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 07:48:49,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:49,506 INFO L225 Difference]: With dead ends: 38 [2022-03-19 07:48:49,506 INFO L226 Difference]: Without dead ends: 31 [2022-03-19 07:48:49,507 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-03-19 07:48:49,507 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:49,507 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 29 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:48:49,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-19 07:48:49,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-19 07:48:49,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:49,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-03-19 07:48:49,517 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2022-03-19 07:48:49,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:49,517 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-03-19 07:48:49,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:49,517 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-03-19 07:48:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 07:48:49,521 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:49,521 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:49,521 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-19 07:48:49,521 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:49,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:49,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2072871847, now seen corresponding path program 1 times [2022-03-19 07:48:49,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:49,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [826099978] [2022-03-19 07:48:49,523 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:49,523 INFO L85 PathProgramCache]: Analyzing trace with hash 2072871847, now seen corresponding path program 2 times [2022-03-19 07:48:49,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:49,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631652372] [2022-03-19 07:48:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:49,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:49,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:49,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:49,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631652372] [2022-03-19 07:48:49,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631652372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:49,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:49,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 07:48:49,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:49,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [826099978] [2022-03-19 07:48:49,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [826099978] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:49,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:49,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 07:48:49,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049367123] [2022-03-19 07:48:49,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:49,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 07:48:49,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 07:48:49,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-03-19 07:48:49,628 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:49,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:49,761 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2022-03-19 07:48:49,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 07:48:49,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 07:48:49,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:49,762 INFO L225 Difference]: With dead ends: 38 [2022-03-19 07:48:49,762 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 07:48:49,763 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-03-19 07:48:49,763 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:49,763 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 32 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:48:49,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 07:48:49,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 07:48:49,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:49,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-03-19 07:48:49,767 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2022-03-19 07:48:49,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:49,767 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-03-19 07:48:49,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:49,767 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-03-19 07:48:49,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 07:48:49,768 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:49,768 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:49,768 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-19 07:48:49,768 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:49,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:49,769 INFO L85 PathProgramCache]: Analyzing trace with hash -928406012, now seen corresponding path program 1 times [2022-03-19 07:48:49,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:49,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [651511810] [2022-03-19 07:48:49,769 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:49,769 INFO L85 PathProgramCache]: Analyzing trace with hash -928406012, now seen corresponding path program 2 times [2022-03-19 07:48:49,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:49,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214690408] [2022-03-19 07:48:49,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:49,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:49,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:49,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:49,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214690408] [2022-03-19 07:48:49,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214690408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:48:49,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749358546] [2022-03-19 07:48:49,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:48:49,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:48:49,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:48:49,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:48:49,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 07:48:49,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:48:49,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:48:49,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 07:48:49,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:48:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:49,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:48:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:50,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749358546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:48:50,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:48:50,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-19 07:48:50,178 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:50,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [651511810] [2022-03-19 07:48:50,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [651511810] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:50,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:50,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:48:50,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498672062] [2022-03-19 07:48:50,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:50,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:48:50,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:50,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:48:50,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-19 07:48:50,180 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:50,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:50,329 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-03-19 07:48:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 07:48:50,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-19 07:48:50,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:50,330 INFO L225 Difference]: With dead ends: 40 [2022-03-19 07:48:50,330 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 07:48:50,330 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 07:48:50,332 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:50,332 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 22 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:48:50,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 07:48:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-19 07:48:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-03-19 07:48:50,335 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2022-03-19 07:48:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:50,335 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-03-19 07:48:50,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-03-19 07:48:50,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 07:48:50,337 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:50,337 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:50,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 07:48:50,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:48:50,569 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:50,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:50,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1061594401, now seen corresponding path program 3 times [2022-03-19 07:48:50,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:50,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2045633088] [2022-03-19 07:48:50,571 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:50,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1061594401, now seen corresponding path program 4 times [2022-03-19 07:48:50,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:50,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153803279] [2022-03-19 07:48:50,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:50,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:50,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:50,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:50,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153803279] [2022-03-19 07:48:50,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153803279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:48:50,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656261938] [2022-03-19 07:48:50,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:48:50,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:48:50,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:48:50,665 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:48:50,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 07:48:50,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:48:50,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:48:50,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 07:48:50,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:48:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:50,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:48:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:50,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656261938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:48:50,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:48:50,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-19 07:48:50,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:50,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2045633088] [2022-03-19 07:48:50,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2045633088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:50,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:50,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 07:48:50,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170670493] [2022-03-19 07:48:50,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:50,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 07:48:50,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:50,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 07:48:50,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-03-19 07:48:50,931 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:51,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:51,037 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-03-19 07:48:51,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:48:51,038 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-19 07:48:51,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:51,038 INFO L225 Difference]: With dead ends: 42 [2022-03-19 07:48:51,038 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 07:48:51,039 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=678, Invalid=882, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 07:48:51,039 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:51,039 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 27 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:48:51,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 07:48:51,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-19 07:48:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-03-19 07:48:51,043 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2022-03-19 07:48:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:51,043 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-03-19 07:48:51,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-03-19 07:48:51,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 07:48:51,043 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:51,043 INFO L500 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2022-03-19 07:48:51,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 07:48:51,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 07:48:51,252 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:51,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:51,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2103422722, now seen corresponding path program 5 times [2022-03-19 07:48:51,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:51,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1994515361] [2022-03-19 07:48:51,253 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:51,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2103422722, now seen corresponding path program 6 times [2022-03-19 07:48:51,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:51,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611653086] [2022-03-19 07:48:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:51,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:51,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:51,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:51,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611653086] [2022-03-19 07:48:51,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611653086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:48:51,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096753298] [2022-03-19 07:48:51,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:48:51,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:48:51,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:48:51,384 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:48:51,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 07:48:51,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 07:48:51,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:48:51,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 07:48:51,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:48:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 07:48:51,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:48:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 07:48:51,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096753298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:48:51,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:48:51,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5] total 22 [2022-03-19 07:48:51,574 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:51,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1994515361] [2022-03-19 07:48:51,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1994515361] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:51,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:51,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 07:48:51,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582905410] [2022-03-19 07:48:51,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:51,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 07:48:51,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:51,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 07:48:51,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-03-19 07:48:51,575 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:51,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:51,751 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-03-19 07:48:51,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 07:48:51,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-19 07:48:51,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:51,752 INFO L225 Difference]: With dead ends: 44 [2022-03-19 07:48:51,752 INFO L226 Difference]: Without dead ends: 39 [2022-03-19 07:48:51,753 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=692, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:48:51,753 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:51,754 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 27 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:48:51,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-19 07:48:51,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-19 07:48:51,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-03-19 07:48:51,766 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2022-03-19 07:48:51,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:51,766 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-03-19 07:48:51,766 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:51,766 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-03-19 07:48:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 07:48:51,767 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:51,767 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:51,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 07:48:51,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:48:51,984 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:51,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:51,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1446934939, now seen corresponding path program 7 times [2022-03-19 07:48:51,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:51,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [690982473] [2022-03-19 07:48:51,985 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:51,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1446934939, now seen corresponding path program 8 times [2022-03-19 07:48:51,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:51,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913445786] [2022-03-19 07:48:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:51,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:52,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:52,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:52,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913445786] [2022-03-19 07:48:52,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913445786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:48:52,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202459528] [2022-03-19 07:48:52,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:48:52,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:48:52,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:48:52,113 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) [2022-03-19 07:48:52,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 07:48:52,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:48:52,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:48:52,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 07:48:52,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:48:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:52,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:48:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:52,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202459528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:48:52,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:48:52,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-03-19 07:48:52,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:52,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [690982473] [2022-03-19 07:48:52,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [690982473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:52,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:52,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 07:48:52,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900085060] [2022-03-19 07:48:52,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:52,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 07:48:52,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:52,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 07:48:52,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 07:48:52,494 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:52,695 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-03-19 07:48:52,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 07:48:52,696 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-19 07:48:52,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:52,696 INFO L225 Difference]: With dead ends: 46 [2022-03-19 07:48:52,696 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 07:48:52,697 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=993, Invalid=1263, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 07:48:52,697 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:52,698 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 22 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:48:52,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 07:48:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-19 07:48:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:52,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-03-19 07:48:52,700 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2022-03-19 07:48:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:52,701 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-03-19 07:48:52,701 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:52,701 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-03-19 07:48:52,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 07:48:52,701 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:52,701 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:52,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 07:48:52,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:48:52,915 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:52,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:52,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1158353160, now seen corresponding path program 9 times [2022-03-19 07:48:52,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:52,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [745734158] [2022-03-19 07:48:52,916 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:52,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1158353160, now seen corresponding path program 10 times [2022-03-19 07:48:52,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:52,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082327915] [2022-03-19 07:48:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:52,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:53,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:53,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:53,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082327915] [2022-03-19 07:48:53,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082327915] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:48:53,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612347796] [2022-03-19 07:48:53,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:48:53,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:48:53,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:48:53,056 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) [2022-03-19 07:48:53,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 07:48:53,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:48:53,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:48:53,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 07:48:53,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:48:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:53,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:48:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:53,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612347796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:48:53,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:48:53,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-19 07:48:53,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:53,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [745734158] [2022-03-19 07:48:53,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [745734158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:53,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:53,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 07:48:53,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31339534] [2022-03-19 07:48:53,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:53,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 07:48:53,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:53,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 07:48:53,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 07:48:53,466 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:53,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:53,684 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-03-19 07:48:53,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 07:48:53,684 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-19 07:48:53,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:53,684 INFO L225 Difference]: With dead ends: 48 [2022-03-19 07:48:53,684 INFO L226 Difference]: Without dead ends: 43 [2022-03-19 07:48:53,685 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1026, Invalid=1326, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 07:48:53,685 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 53 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:53,686 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 27 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:48:53,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-19 07:48:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-19 07:48:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-03-19 07:48:53,688 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2022-03-19 07:48:53,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:53,689 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-03-19 07:48:53,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:53,689 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-03-19 07:48:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 07:48:53,689 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:53,689 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:53,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 07:48:53,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 07:48:53,906 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:53,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:53,907 INFO L85 PathProgramCache]: Analyzing trace with hash -874282731, now seen corresponding path program 11 times [2022-03-19 07:48:53,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:53,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1336678949] [2022-03-19 07:48:53,907 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:53,907 INFO L85 PathProgramCache]: Analyzing trace with hash -874282731, now seen corresponding path program 12 times [2022-03-19 07:48:53,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:53,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004418744] [2022-03-19 07:48:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:53,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:54,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:54,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:54,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004418744] [2022-03-19 07:48:54,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004418744] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:48:54,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576870405] [2022-03-19 07:48:54,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:48:54,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:48:54,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:48:54,046 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) [2022-03-19 07:48:54,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 07:48:54,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 07:48:54,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:48:54,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:48:54,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:48:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 07:48:54,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:48:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 07:48:54,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576870405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:48:54,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:48:54,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 6] total 27 [2022-03-19 07:48:54,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:54,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1336678949] [2022-03-19 07:48:54,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1336678949] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:54,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:54,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 07:48:54,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327600819] [2022-03-19 07:48:54,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:54,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 07:48:54,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:54,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 07:48:54,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-03-19 07:48:54,281 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:54,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:54,509 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-03-19 07:48:54,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 07:48:54,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-19 07:48:54,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:54,510 INFO L225 Difference]: With dead ends: 50 [2022-03-19 07:48:54,510 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 07:48:54,511 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1047, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 07:48:54,511 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:54,511 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 22 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:48:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 07:48:54,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-19 07:48:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-03-19 07:48:54,514 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2022-03-19 07:48:54,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:54,514 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-03-19 07:48:54,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:54,514 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-03-19 07:48:54,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 07:48:54,514 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:54,514 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:54,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 07:48:54,726 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:48:54,727 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:54,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:54,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1534459890, now seen corresponding path program 13 times [2022-03-19 07:48:54,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:54,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1545393805] [2022-03-19 07:48:54,728 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:54,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1534459890, now seen corresponding path program 14 times [2022-03-19 07:48:54,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:54,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992065509] [2022-03-19 07:48:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:54,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:54,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:54,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:54,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992065509] [2022-03-19 07:48:54,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992065509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:48:54,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688498461] [2022-03-19 07:48:54,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:48:54,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:48:54,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:48:54,956 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) [2022-03-19 07:48:54,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 07:48:54,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:48:54,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:48:54,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 07:48:54,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:48:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 07:48:55,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:48:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 07:48:55,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688498461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:48:55,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:48:55,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6, 6] total 28 [2022-03-19 07:48:55,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:55,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1545393805] [2022-03-19 07:48:55,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1545393805] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:55,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:55,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 07:48:55,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145115340] [2022-03-19 07:48:55,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:55,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 07:48:55,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:55,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 07:48:55,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-03-19 07:48:55,186 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:55,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:55,425 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-03-19 07:48:55,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 07:48:55,426 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-19 07:48:55,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:55,426 INFO L225 Difference]: With dead ends: 52 [2022-03-19 07:48:55,426 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 07:48:55,428 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=829, Invalid=1151, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 07:48:55,429 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:55,429 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 27 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:48:55,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 07:48:55,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-19 07:48:55,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-03-19 07:48:55,432 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2022-03-19 07:48:55,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:55,432 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-03-19 07:48:55,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:55,432 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-03-19 07:48:55,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 07:48:55,432 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:55,433 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:55,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 07:48:55,640 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:48:55,641 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:55,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1348746127, now seen corresponding path program 15 times [2022-03-19 07:48:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:55,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [625824197] [2022-03-19 07:48:55,642 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:55,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1348746127, now seen corresponding path program 16 times [2022-03-19 07:48:55,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:55,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718996331] [2022-03-19 07:48:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:55,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:55,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:55,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:55,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718996331] [2022-03-19 07:48:55,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718996331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:48:55,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378432971] [2022-03-19 07:48:55,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:48:55,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:48:55,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:48:55,810 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) [2022-03-19 07:48:55,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 07:48:55,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:48:55,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:48:55,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 07:48:55,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:48:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:55,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:48:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:56,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378432971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:48:56,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:48:56,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-03-19 07:48:56,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:56,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [625824197] [2022-03-19 07:48:56,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [625824197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:56,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:56,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 07:48:56,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748623137] [2022-03-19 07:48:56,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:56,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 07:48:56,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:56,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 07:48:56,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 07:48:56,334 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:56,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:56,611 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2022-03-19 07:48:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 07:48:56,612 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-19 07:48:56,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:56,612 INFO L225 Difference]: With dead ends: 54 [2022-03-19 07:48:56,612 INFO L226 Difference]: Without dead ends: 49 [2022-03-19 07:48:56,613 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-03-19 07:48:56,614 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:56,614 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:48:56,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-19 07:48:56,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-19 07:48:56,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:56,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-03-19 07:48:56,617 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2022-03-19 07:48:56,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:56,618 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-03-19 07:48:56,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-03-19 07:48:56,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 07:48:56,618 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:56,618 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:56,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 07:48:56,829 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 07:48:56,830 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:56,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:56,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1028520980, now seen corresponding path program 17 times [2022-03-19 07:48:56,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:56,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1794422908] [2022-03-19 07:48:56,831 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:56,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1028520980, now seen corresponding path program 18 times [2022-03-19 07:48:56,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:56,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622511714] [2022-03-19 07:48:56,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:56,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:56,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:56,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:56,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622511714] [2022-03-19 07:48:56,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622511714] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:48:56,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70499383] [2022-03-19 07:48:57,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:48:57,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:48:57,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:48:57,001 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) [2022-03-19 07:48:57,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 07:48:57,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 07:48:57,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:48:57,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 07:48:57,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:48:57,124 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 07:48:57,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:48:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 07:48:57,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70499383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:48:57,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:48:57,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 4, 4] total 26 [2022-03-19 07:48:57,195 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:57,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1794422908] [2022-03-19 07:48:57,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1794422908] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:57,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:57,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 07:48:57,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120010480] [2022-03-19 07:48:57,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:57,196 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 07:48:57,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:57,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 07:48:57,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-19 07:48:57,196 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:57,461 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2022-03-19 07:48:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 07:48:57,462 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-19 07:48:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:57,462 INFO L225 Difference]: With dead ends: 56 [2022-03-19 07:48:57,462 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 07:48:57,463 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1184, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 07:48:57,463 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 53 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:57,463 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 32 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:48:57,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 07:48:57,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-19 07:48:57,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-03-19 07:48:57,466 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 47 [2022-03-19 07:48:57,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:57,466 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-03-19 07:48:57,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:57,466 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-03-19 07:48:57,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 07:48:57,466 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:57,466 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:57,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 07:48:57,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 07:48:57,667 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:57,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:57,667 INFO L85 PathProgramCache]: Analyzing trace with hash -659609335, now seen corresponding path program 19 times [2022-03-19 07:48:57,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:57,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1695113875] [2022-03-19 07:48:57,668 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:57,668 INFO L85 PathProgramCache]: Analyzing trace with hash -659609335, now seen corresponding path program 20 times [2022-03-19 07:48:57,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:57,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121243808] [2022-03-19 07:48:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:57,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:57,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:57,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:57,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121243808] [2022-03-19 07:48:57,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121243808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:48:57,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078340585] [2022-03-19 07:48:57,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:48:57,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:48:57,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:48:57,852 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) [2022-03-19 07:48:57,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 07:48:57,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:48:57,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:48:57,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 07:48:57,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:48:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 65 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 07:48:58,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:48:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 65 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 07:48:58,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078340585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:48:58,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:48:58,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9, 9] total 37 [2022-03-19 07:48:58,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:58,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1695113875] [2022-03-19 07:48:58,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1695113875] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:58,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:58,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 07:48:58,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330177980] [2022-03-19 07:48:58,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:58,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 07:48:58,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:58,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 07:48:58,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 07:48:58,238 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:58,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:58,534 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-03-19 07:48:58,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 07:48:58,534 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-03-19 07:48:58,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:58,534 INFO L225 Difference]: With dead ends: 58 [2022-03-19 07:48:58,534 INFO L226 Difference]: Without dead ends: 53 [2022-03-19 07:48:58,535 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1372, Invalid=1820, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 07:48:58,536 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:58,536 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 17 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:48:58,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-19 07:48:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-19 07:48:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-03-19 07:48:58,538 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2022-03-19 07:48:58,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:58,539 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-03-19 07:48:58,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:58,539 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-03-19 07:48:58,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 07:48:58,539 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:58,539 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:58,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 07:48:58,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 07:48:58,740 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:48:58,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:48:58,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1677163238, now seen corresponding path program 21 times [2022-03-19 07:48:58,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:58,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2124139358] [2022-03-19 07:48:58,741 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:48:58,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1677163238, now seen corresponding path program 22 times [2022-03-19 07:48:58,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:48:58,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184506845] [2022-03-19 07:48:58,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:48:58,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:48:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:58,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:48:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:48:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:58,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:48:58,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184506845] [2022-03-19 07:48:58,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184506845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:48:58,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028771632] [2022-03-19 07:48:58,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:48:58,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:48:58,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:48:58,954 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) [2022-03-19 07:48:58,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 07:48:58,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:48:58,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:48:58,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 07:48:58,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:48:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:59,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:48:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:48:59,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028771632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:48:59,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:48:59,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-03-19 07:48:59,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:48:59,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2124139358] [2022-03-19 07:48:59,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2124139358] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:48:59,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:48:59,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 07:48:59,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201413932] [2022-03-19 07:48:59,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:48:59,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 07:48:59,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:48:59,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 07:48:59,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 07:48:59,590 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:48:59,799 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-03-19 07:48:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 07:48:59,799 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-19 07:48:59,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:48:59,800 INFO L225 Difference]: With dead ends: 60 [2022-03-19 07:48:59,800 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 07:48:59,801 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-03-19 07:48:59,802 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 69 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:48:59,802 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 27 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:48:59,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 07:48:59,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-19 07:48:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:59,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-03-19 07:48:59,821 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2022-03-19 07:48:59,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:48:59,821 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-03-19 07:48:59,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:48:59,821 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-03-19 07:48:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 07:48:59,821 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:48:59,821 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:48:59,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:00,038 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:00,038 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:00,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:00,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1047710083, now seen corresponding path program 23 times [2022-03-19 07:49:00,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:00,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1517755770] [2022-03-19 07:49:00,040 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:00,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1047710083, now seen corresponding path program 24 times [2022-03-19 07:49:00,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:00,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996602016] [2022-03-19 07:49:00,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:00,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:00,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:00,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:00,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996602016] [2022-03-19 07:49:00,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996602016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:00,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979366700] [2022-03-19 07:49:00,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:49:00,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:00,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:00,242 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) [2022-03-19 07:49:00,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 07:49:00,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 07:49:00,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:00,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 07:49:00,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-19 07:49:00,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-19 07:49:00,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979366700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:00,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:00,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 4, 4] total 29 [2022-03-19 07:49:00,473 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:00,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1517755770] [2022-03-19 07:49:00,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1517755770] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:00,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:00,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 07:49:00,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848942310] [2022-03-19 07:49:00,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:00,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 07:49:00,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:00,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 07:49:00,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-03-19 07:49:00,480 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:00,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:00,850 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2022-03-19 07:49:00,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 07:49:00,851 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-19 07:49:00,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:00,851 INFO L225 Difference]: With dead ends: 62 [2022-03-19 07:49:00,851 INFO L226 Difference]: Without dead ends: 57 [2022-03-19 07:49:00,852 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1018, Invalid=1532, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 07:49:00,852 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:00,852 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 37 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:00,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-19 07:49:00,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-19 07:49:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-03-19 07:49:00,855 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2022-03-19 07:49:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:00,855 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-03-19 07:49:00,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:00,855 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-03-19 07:49:00,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 07:49:00,856 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:00,856 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:00,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:01,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:01,079 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:01,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:01,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1733616864, now seen corresponding path program 25 times [2022-03-19 07:49:01,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:01,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1804309443] [2022-03-19 07:49:01,080 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:01,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1733616864, now seen corresponding path program 26 times [2022-03-19 07:49:01,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:01,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99036790] [2022-03-19 07:49:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:01,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:01,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:01,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:01,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99036790] [2022-03-19 07:49:01,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99036790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:01,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778411683] [2022-03-19 07:49:01,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:49:01,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:01,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:01,247 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) [2022-03-19 07:49:01,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 07:49:01,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:49:01,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:01,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 07:49:01,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:01,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:01,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778411683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:01,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:01,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-19 07:49:01,971 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:01,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1804309443] [2022-03-19 07:49:01,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1804309443] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:01,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:01,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 07:49:01,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689544827] [2022-03-19 07:49:01,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:01,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 07:49:01,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:01,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 07:49:01,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 07:49:01,972 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:02,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:02,300 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-03-19 07:49:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 07:49:02,300 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-03-19 07:49:02,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:02,301 INFO L225 Difference]: With dead ends: 64 [2022-03-19 07:49:02,301 INFO L226 Difference]: Without dead ends: 59 [2022-03-19 07:49:02,302 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-03-19 07:49:02,302 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 69 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:02,303 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 27 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-19 07:49:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-03-19 07:49:02,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:02,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-03-19 07:49:02,307 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 55 [2022-03-19 07:49:02,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:02,307 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-03-19 07:49:02,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:02,307 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-03-19 07:49:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 07:49:02,307 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:02,308 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:02,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:02,524 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 07:49:02,525 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:02,525 INFO L85 PathProgramCache]: Analyzing trace with hash -534930179, now seen corresponding path program 27 times [2022-03-19 07:49:02,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:02,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [107412276] [2022-03-19 07:49:02,527 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash -534930179, now seen corresponding path program 28 times [2022-03-19 07:49:02,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:02,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613489923] [2022-03-19 07:49:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:02,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:02,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:02,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:02,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613489923] [2022-03-19 07:49:02,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613489923] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:02,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171392842] [2022-03-19 07:49:02,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:49:02,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:02,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:02,686 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) [2022-03-19 07:49:02,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 07:49:02,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:49:02,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:02,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 07:49:02,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:02,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:03,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171392842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:03,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:03,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-03-19 07:49:03,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:03,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [107412276] [2022-03-19 07:49:03,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [107412276] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:03,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:03,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 07:49:03,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925123493] [2022-03-19 07:49:03,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:03,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 07:49:03,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:03,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 07:49:03,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 07:49:03,217 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:03,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:03,493 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2022-03-19 07:49:03,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 07:49:03,493 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-03-19 07:49:03,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:03,494 INFO L225 Difference]: With dead ends: 66 [2022-03-19 07:49:03,494 INFO L226 Difference]: Without dead ends: 61 [2022-03-19 07:49:03,495 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2502, Invalid=3198, Unknown=0, NotChecked=0, Total=5700 [2022-03-19 07:49:03,496 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:03,496 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 32 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:49:03,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-19 07:49:03,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-19 07:49:03,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:03,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-03-19 07:49:03,500 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2022-03-19 07:49:03,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:03,500 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-03-19 07:49:03,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:03,500 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-03-19 07:49:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 07:49:03,500 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:03,501 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:03,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:03,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:03,715 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:03,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1234747866, now seen corresponding path program 29 times [2022-03-19 07:49:03,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:03,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1339947168] [2022-03-19 07:49:03,716 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:03,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1234747866, now seen corresponding path program 30 times [2022-03-19 07:49:03,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:03,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332449274] [2022-03-19 07:49:03,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:03,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:03,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:03,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:03,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332449274] [2022-03-19 07:49:03,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332449274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:03,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237006239] [2022-03-19 07:49:03,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:49:03,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:03,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:03,982 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:03,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 07:49:04,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 07:49:04,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:04,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 07:49:04,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 07:49:04,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 07:49:04,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237006239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:04,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:04,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 4, 4] total 32 [2022-03-19 07:49:04,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:04,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1339947168] [2022-03-19 07:49:04,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1339947168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:04,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:04,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 07:49:04,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546613086] [2022-03-19 07:49:04,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:04,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 07:49:04,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:04,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 07:49:04,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-19 07:49:04,230 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:04,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:04,558 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2022-03-19 07:49:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 07:49:04,558 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-03-19 07:49:04,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:04,559 INFO L225 Difference]: With dead ends: 68 [2022-03-19 07:49:04,559 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 07:49:04,560 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1267, Invalid=1925, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 07:49:04,560 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 66 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:04,560 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 27 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:04,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 07:49:04,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-03-19 07:49:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-03-19 07:49:04,564 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 59 [2022-03-19 07:49:04,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:04,564 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-03-19 07:49:04,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:04,564 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-03-19 07:49:04,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 07:49:04,564 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:04,564 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:04,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:04,781 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:04,781 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:04,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1088299895, now seen corresponding path program 31 times [2022-03-19 07:49:04,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:04,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [405980941] [2022-03-19 07:49:04,782 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:04,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1088299895, now seen corresponding path program 32 times [2022-03-19 07:49:04,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:04,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204768358] [2022-03-19 07:49:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:04,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:04,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:04,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:04,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204768358] [2022-03-19 07:49:04,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204768358] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:04,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024149970] [2022-03-19 07:49:04,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:49:04,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:04,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:04,998 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:05,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 07:49:05,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:49:05,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:05,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 07:49:05,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:05,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:05,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024149970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:05,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:05,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 54 [2022-03-19 07:49:05,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:05,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [405980941] [2022-03-19 07:49:05,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [405980941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:05,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:05,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-19 07:49:05,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864720621] [2022-03-19 07:49:05,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:05,784 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 07:49:05,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:05,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 07:49:05,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:49:05,786 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:06,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:06,225 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2022-03-19 07:49:06,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 07:49:06,225 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-03-19 07:49:06,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:06,225 INFO L225 Difference]: With dead ends: 70 [2022-03-19 07:49:06,225 INFO L226 Difference]: Without dead ends: 65 [2022-03-19 07:49:06,226 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2759, Invalid=3561, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 07:49:06,228 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:06,228 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 42 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:06,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-19 07:49:06,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-19 07:49:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-03-19 07:49:06,232 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2022-03-19 07:49:06,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:06,232 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-03-19 07:49:06,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-03-19 07:49:06,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 07:49:06,233 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:06,233 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:06,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:06,449 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-19 07:49:06,450 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:06,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:06,450 INFO L85 PathProgramCache]: Analyzing trace with hash 2085720532, now seen corresponding path program 33 times [2022-03-19 07:49:06,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:06,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1055437054] [2022-03-19 07:49:06,451 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:06,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2085720532, now seen corresponding path program 34 times [2022-03-19 07:49:06,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:06,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46001304] [2022-03-19 07:49:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:06,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:06,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:06,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:06,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46001304] [2022-03-19 07:49:06,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46001304] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:06,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151028438] [2022-03-19 07:49:06,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:49:06,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:06,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:06,760 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:06,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 07:49:06,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:49:06,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:06,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 07:49:06,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:06,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:07,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151028438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:07,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:07,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 54 [2022-03-19 07:49:07,458 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:07,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1055437054] [2022-03-19 07:49:07,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1055437054] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:07,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:07,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-19 07:49:07,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032167955] [2022-03-19 07:49:07,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:07,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 07:49:07,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:07,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 07:49:07,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:49:07,460 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:07,759 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2022-03-19 07:49:07,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 07:49:07,759 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-03-19 07:49:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:07,760 INFO L225 Difference]: With dead ends: 72 [2022-03-19 07:49:07,760 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 07:49:07,761 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2812, Invalid=3668, Unknown=0, NotChecked=0, Total=6480 [2022-03-19 07:49:07,761 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:07,761 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 32 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:49:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 07:49:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-19 07:49:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-03-19 07:49:07,764 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 63 [2022-03-19 07:49:07,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:07,764 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-03-19 07:49:07,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:07,764 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-03-19 07:49:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 07:49:07,765 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:07,765 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:07,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:07,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:07,976 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:07,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:07,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1465721615, now seen corresponding path program 35 times [2022-03-19 07:49:07,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:07,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [72558018] [2022-03-19 07:49:07,977 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:07,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1465721615, now seen corresponding path program 36 times [2022-03-19 07:49:07,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:07,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172356506] [2022-03-19 07:49:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:07,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:08,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:08,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:08,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172356506] [2022-03-19 07:49:08,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172356506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:08,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335408031] [2022-03-19 07:49:08,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:49:08,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:08,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:08,297 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:08,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 07:49:08,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 07:49:08,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:08,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 07:49:08,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-03-19 07:49:08,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-03-19 07:49:08,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335408031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:08,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:08,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 4, 4] total 35 [2022-03-19 07:49:08,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:08,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [72558018] [2022-03-19 07:49:08,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [72558018] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:08,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:08,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-19 07:49:08,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604992160] [2022-03-19 07:49:08,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:08,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 07:49:08,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:08,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 07:49:08,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:49:08,508 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:08,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:08,963 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2022-03-19 07:49:08,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 07:49:08,964 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-19 07:49:08,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:08,965 INFO L225 Difference]: With dead ends: 74 [2022-03-19 07:49:08,965 INFO L226 Difference]: Without dead ends: 69 [2022-03-19 07:49:08,966 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1543, Invalid=2363, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 07:49:08,966 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:08,966 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 22 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:08,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-19 07:49:08,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-03-19 07:49:08,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-03-19 07:49:08,969 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2022-03-19 07:49:08,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:08,970 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-03-19 07:49:08,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:08,970 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-03-19 07:49:08,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 07:49:08,970 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:08,970 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:08,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:09,188 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:09,188 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:09,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:09,188 INFO L85 PathProgramCache]: Analyzing trace with hash 97375438, now seen corresponding path program 37 times [2022-03-19 07:49:09,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:09,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1645955440] [2022-03-19 07:49:09,189 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:09,189 INFO L85 PathProgramCache]: Analyzing trace with hash 97375438, now seen corresponding path program 38 times [2022-03-19 07:49:09,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:09,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963235789] [2022-03-19 07:49:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:09,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:09,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:09,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:09,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963235789] [2022-03-19 07:49:09,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963235789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:09,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336032806] [2022-03-19 07:49:09,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:49:09,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:09,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:09,475 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:09,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 07:49:09,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:49:09,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:09,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 07:49:09,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:09,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:10,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336032806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:10,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:10,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 54 [2022-03-19 07:49:10,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:10,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1645955440] [2022-03-19 07:49:10,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1645955440] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:10,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:10,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-19 07:49:10,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244553066] [2022-03-19 07:49:10,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:10,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 07:49:10,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:10,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 07:49:10,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:49:10,051 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:10,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:10,474 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2022-03-19 07:49:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 07:49:10,475 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-03-19 07:49:10,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:10,476 INFO L225 Difference]: With dead ends: 76 [2022-03-19 07:49:10,476 INFO L226 Difference]: Without dead ends: 71 [2022-03-19 07:49:10,478 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2918, Invalid=3888, Unknown=0, NotChecked=0, Total=6806 [2022-03-19 07:49:10,478 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:10,479 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 57 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:10,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-19 07:49:10,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-19 07:49:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-03-19 07:49:10,485 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 67 [2022-03-19 07:49:10,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:10,485 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-03-19 07:49:10,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:10,490 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-03-19 07:49:10,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 07:49:10,490 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:10,490 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:10,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-19 07:49:10,706 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:10,706 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:10,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:10,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1004910229, now seen corresponding path program 39 times [2022-03-19 07:49:10,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:10,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1913456279] [2022-03-19 07:49:10,707 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:10,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1004910229, now seen corresponding path program 40 times [2022-03-19 07:49:10,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:10,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008203619] [2022-03-19 07:49:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:10,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:10,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:10,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:10,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008203619] [2022-03-19 07:49:10,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008203619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:10,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220565033] [2022-03-19 07:49:10,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:49:10,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:10,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:10,943 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:10,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 07:49:10,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:49:10,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:10,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 07:49:10,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:11,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:11,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220565033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:11,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:11,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 54 [2022-03-19 07:49:11,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:11,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1913456279] [2022-03-19 07:49:11,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1913456279] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:11,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:11,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-19 07:49:11,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241226475] [2022-03-19 07:49:11,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:11,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 07:49:11,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:11,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 07:49:11,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:49:11,705 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:12,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:12,061 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2022-03-19 07:49:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 07:49:12,061 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-03-19 07:49:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:12,061 INFO L225 Difference]: With dead ends: 78 [2022-03-19 07:49:12,061 INFO L226 Difference]: Without dead ends: 73 [2022-03-19 07:49:12,062 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2971, Invalid=4001, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 07:49:12,063 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 63 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:12,063 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 42 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:12,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-19 07:49:12,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-19 07:49:12,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:12,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-03-19 07:49:12,066 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 69 [2022-03-19 07:49:12,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:12,066 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-03-19 07:49:12,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:12,067 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-03-19 07:49:12,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 07:49:12,067 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:12,067 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:12,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:12,284 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 07:49:12,284 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:12,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:12,284 INFO L85 PathProgramCache]: Analyzing trace with hash 555485896, now seen corresponding path program 41 times [2022-03-19 07:49:12,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:12,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [762545669] [2022-03-19 07:49:12,285 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:12,285 INFO L85 PathProgramCache]: Analyzing trace with hash 555485896, now seen corresponding path program 42 times [2022-03-19 07:49:12,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:12,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298894345] [2022-03-19 07:49:12,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:12,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:12,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:12,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:12,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298894345] [2022-03-19 07:49:12,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298894345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:12,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016145807] [2022-03-19 07:49:12,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:49:12,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:12,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:12,556 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:12,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 07:49:12,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 07:49:12,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:12,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 07:49:12,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 07:49:12,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 07:49:12,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016145807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:12,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:12,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 4, 4] total 38 [2022-03-19 07:49:12,721 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:12,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [762545669] [2022-03-19 07:49:12,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [762545669] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:12,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:12,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-19 07:49:12,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472220656] [2022-03-19 07:49:12,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:12,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 07:49:12,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:12,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 07:49:12,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:49:12,723 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:13,112 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2022-03-19 07:49:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 07:49:13,113 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-19 07:49:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:13,113 INFO L225 Difference]: With dead ends: 80 [2022-03-19 07:49:13,113 INFO L226 Difference]: Without dead ends: 75 [2022-03-19 07:49:13,114 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1846, Invalid=2846, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 07:49:13,118 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:13,118 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 27 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-19 07:49:13,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-03-19 07:49:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-03-19 07:49:13,123 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2022-03-19 07:49:13,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:13,123 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-03-19 07:49:13,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:13,123 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-03-19 07:49:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 07:49:13,124 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:13,124 INFO L500 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:13,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-19 07:49:13,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 07:49:13,340 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:13,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:13,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1152575717, now seen corresponding path program 43 times [2022-03-19 07:49:13,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:13,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1965281828] [2022-03-19 07:49:13,341 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:13,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1152575717, now seen corresponding path program 44 times [2022-03-19 07:49:13,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:13,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576527500] [2022-03-19 07:49:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:13,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:13,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:13,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:13,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576527500] [2022-03-19 07:49:13,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576527500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:13,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161621034] [2022-03-19 07:49:13,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:49:13,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:13,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:13,651 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:13,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 07:49:13,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:49:13,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:13,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 07:49:13,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 105 proven. 4 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 07:49:13,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 105 proven. 4 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 07:49:13,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161621034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:13,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:13,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 5, 5] total 41 [2022-03-19 07:49:13,863 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:13,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1965281828] [2022-03-19 07:49:13,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1965281828] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:13,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:13,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-19 07:49:13,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399377863] [2022-03-19 07:49:13,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:13,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 07:49:13,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:13,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 07:49:13,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 07:49:13,864 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:14,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:14,403 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2022-03-19 07:49:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 07:49:14,403 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-03-19 07:49:14,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:14,404 INFO L225 Difference]: With dead ends: 82 [2022-03-19 07:49:14,404 INFO L226 Difference]: Without dead ends: 77 [2022-03-19 07:49:14,404 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2094, Invalid=3162, Unknown=0, NotChecked=0, Total=5256 [2022-03-19 07:49:14,405 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:14,405 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 27 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:14,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-19 07:49:14,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-03-19 07:49:14,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-03-19 07:49:14,408 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2022-03-19 07:49:14,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:14,409 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-03-19 07:49:14,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-03-19 07:49:14,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 07:49:14,409 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:14,409 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:14,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:14,625 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:14,626 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:14,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:14,626 INFO L85 PathProgramCache]: Analyzing trace with hash -569723966, now seen corresponding path program 45 times [2022-03-19 07:49:14,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:14,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [657554239] [2022-03-19 07:49:14,627 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:14,627 INFO L85 PathProgramCache]: Analyzing trace with hash -569723966, now seen corresponding path program 46 times [2022-03-19 07:49:14,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:14,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788221457] [2022-03-19 07:49:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:14,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:14,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:14,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:14,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788221457] [2022-03-19 07:49:14,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788221457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:14,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143857117] [2022-03-19 07:49:14,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:49:14,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:14,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:14,946 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:14,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 07:49:14,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:49:14,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:14,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 07:49:14,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:15,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:15,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143857117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:15,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:15,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 54 [2022-03-19 07:49:15,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:15,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [657554239] [2022-03-19 07:49:15,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [657554239] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:15,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:15,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-19 07:49:15,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240143924] [2022-03-19 07:49:15,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:15,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 07:49:15,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:15,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 07:49:15,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:49:15,562 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:16,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:16,034 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2022-03-19 07:49:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 07:49:16,035 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-03-19 07:49:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:16,036 INFO L225 Difference]: With dead ends: 84 [2022-03-19 07:49:16,036 INFO L226 Difference]: Without dead ends: 79 [2022-03-19 07:49:16,037 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3130, Invalid=4352, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 07:49:16,038 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 78 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:16,038 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 42 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:16,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-19 07:49:16,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-19 07:49:16,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-03-19 07:49:16,042 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 75 [2022-03-19 07:49:16,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:16,042 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-03-19 07:49:16,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:16,043 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-03-19 07:49:16,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 07:49:16,043 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:16,043 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:16,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-19 07:49:16,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:16,260 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:16,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2137310369, now seen corresponding path program 47 times [2022-03-19 07:49:16,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:16,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1774279900] [2022-03-19 07:49:16,261 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2137310369, now seen corresponding path program 48 times [2022-03-19 07:49:16,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:16,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099902963] [2022-03-19 07:49:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:16,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:16,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:16,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:16,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099902963] [2022-03-19 07:49:16,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099902963] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:16,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223780797] [2022-03-19 07:49:16,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:49:16,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:16,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:16,552 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:16,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 07:49:16,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 07:49:16,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:16,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 07:49:16,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-03-19 07:49:16,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-03-19 07:49:16,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223780797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:16,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:16,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 4, 4] total 41 [2022-03-19 07:49:16,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:16,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1774279900] [2022-03-19 07:49:16,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1774279900] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:16,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:16,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-19 07:49:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449188038] [2022-03-19 07:49:16,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:16,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 07:49:16,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:16,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 07:49:16,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 07:49:16,783 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:17,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:17,305 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-03-19 07:49:17,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 07:49:17,306 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-03-19 07:49:17,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:17,306 INFO L225 Difference]: With dead ends: 86 [2022-03-19 07:49:17,306 INFO L226 Difference]: Without dead ends: 81 [2022-03-19 07:49:17,307 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2176, Invalid=3374, Unknown=0, NotChecked=0, Total=5550 [2022-03-19 07:49:17,307 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 77 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:17,307 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 27 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:17,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-19 07:49:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-19 07:49:17,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-03-19 07:49:17,311 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2022-03-19 07:49:17,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:17,311 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-03-19 07:49:17,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:17,311 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-03-19 07:49:17,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 07:49:17,311 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:17,311 INFO L500 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:17,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:17,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:17,523 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:17,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:17,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1054322756, now seen corresponding path program 49 times [2022-03-19 07:49:17,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:17,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [851021489] [2022-03-19 07:49:17,524 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:17,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1054322756, now seen corresponding path program 50 times [2022-03-19 07:49:17,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:17,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895565472] [2022-03-19 07:49:17,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:17,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:17,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:17,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:17,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895565472] [2022-03-19 07:49:17,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895565472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:17,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989882477] [2022-03-19 07:49:17,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:49:17,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:17,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:17,999 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:18,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 07:49:18,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:49:18,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:18,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 07:49:18,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:18,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:18,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989882477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:18,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:18,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 54 [2022-03-19 07:49:18,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:18,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [851021489] [2022-03-19 07:49:18,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [851021489] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:18,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:18,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-19 07:49:18,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783987251] [2022-03-19 07:49:18,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:18,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 07:49:18,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:18,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 07:49:18,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:49:18,666 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:19,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:19,113 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2022-03-19 07:49:19,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 07:49:19,113 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-03-19 07:49:19,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:19,114 INFO L225 Difference]: With dead ends: 88 [2022-03-19 07:49:19,114 INFO L226 Difference]: Without dead ends: 83 [2022-03-19 07:49:19,114 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3236, Invalid=4596, Unknown=0, NotChecked=0, Total=7832 [2022-03-19 07:49:19,115 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 99 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:19,115 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 27 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:19,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-19 07:49:19,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-19 07:49:19,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-03-19 07:49:19,118 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 79 [2022-03-19 07:49:19,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:19,118 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-03-19 07:49:19,118 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-03-19 07:49:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 07:49:19,119 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:19,119 INFO L500 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:19,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:19,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-19 07:49:19,336 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:19,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:19,336 INFO L85 PathProgramCache]: Analyzing trace with hash 314687705, now seen corresponding path program 51 times [2022-03-19 07:49:19,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:19,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [746630642] [2022-03-19 07:49:19,337 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:19,337 INFO L85 PathProgramCache]: Analyzing trace with hash 314687705, now seen corresponding path program 52 times [2022-03-19 07:49:19,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:19,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333040429] [2022-03-19 07:49:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:19,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:19,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:19,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:19,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333040429] [2022-03-19 07:49:19,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333040429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:19,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117168665] [2022-03-19 07:49:19,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:49:19,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:19,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:19,663 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:19,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 07:49:19,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:49:19,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:19,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 07:49:19,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:19,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:20,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117168665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:20,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:20,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 54 [2022-03-19 07:49:20,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:20,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [746630642] [2022-03-19 07:49:20,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [746630642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:20,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:20,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-19 07:49:20,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430208875] [2022-03-19 07:49:20,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:20,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 07:49:20,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:20,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 07:49:20,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:49:20,137 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:20,835 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2022-03-19 07:49:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 07:49:20,835 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-03-19 07:49:20,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:20,836 INFO L225 Difference]: With dead ends: 90 [2022-03-19 07:49:20,836 INFO L226 Difference]: Without dead ends: 85 [2022-03-19 07:49:20,836 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3289, Invalid=4721, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 07:49:20,837 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 87 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:20,837 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 42 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:20,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-19 07:49:20,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-19 07:49:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-03-19 07:49:20,840 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 81 [2022-03-19 07:49:20,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:20,840 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-03-19 07:49:20,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:20,840 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-03-19 07:49:20,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-19 07:49:20,841 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:20,841 INFO L500 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:20,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:21,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-19 07:49:21,051 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:21,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:21,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1673748150, now seen corresponding path program 53 times [2022-03-19 07:49:21,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:21,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1355972665] [2022-03-19 07:49:21,052 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:21,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1673748150, now seen corresponding path program 54 times [2022-03-19 07:49:21,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:21,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010473785] [2022-03-19 07:49:21,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:21,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:21,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:21,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:21,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010473785] [2022-03-19 07:49:21,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010473785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:21,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725283526] [2022-03-19 07:49:21,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:49:21,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:21,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:21,538 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:21,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 07:49:21,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 07:49:21,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:21,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 07:49:21,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 81 proven. 1 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-03-19 07:49:21,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 81 proven. 1 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-03-19 07:49:21,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725283526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:21,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:21,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 4, 4] total 44 [2022-03-19 07:49:21,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:21,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1355972665] [2022-03-19 07:49:21,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1355972665] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:21,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:21,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-19 07:49:21,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834950409] [2022-03-19 07:49:21,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:21,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-19 07:49:21,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:21,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-19 07:49:21,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 07:49:21,836 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:22,540 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2022-03-19 07:49:22,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 07:49:22,540 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-19 07:49:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:22,541 INFO L225 Difference]: With dead ends: 92 [2022-03-19 07:49:22,541 INFO L226 Difference]: Without dead ends: 87 [2022-03-19 07:49:22,542 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2533, Invalid=3947, Unknown=0, NotChecked=0, Total=6480 [2022-03-19 07:49:22,543 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 83 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:22,543 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 42 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:22,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-19 07:49:22,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-03-19 07:49:22,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-03-19 07:49:22,546 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 83 [2022-03-19 07:49:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:22,546 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-03-19 07:49:22,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-03-19 07:49:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 07:49:22,547 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:22,547 INFO L500 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:22,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:22,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-19 07:49:22,763 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:22,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:22,763 INFO L85 PathProgramCache]: Analyzing trace with hash 2060777811, now seen corresponding path program 55 times [2022-03-19 07:49:22,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:22,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [757519813] [2022-03-19 07:49:22,764 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:22,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2060777811, now seen corresponding path program 56 times [2022-03-19 07:49:22,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:22,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667625133] [2022-03-19 07:49:22,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:22,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:23,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:23,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:23,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667625133] [2022-03-19 07:49:23,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667625133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:23,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357636222] [2022-03-19 07:49:23,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:49:23,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:23,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:23,135 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:23,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 07:49:23,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:49:23,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:23,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 07:49:23,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:23,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:23,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357636222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:23,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:23,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 54 [2022-03-19 07:49:23,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:23,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [757519813] [2022-03-19 07:49:23,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [757519813] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:23,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:23,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-19 07:49:23,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613541031] [2022-03-19 07:49:23,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:23,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 07:49:23,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:23,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 07:49:23,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:49:23,583 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:24,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:24,084 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2022-03-19 07:49:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 07:49:24,084 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-03-19 07:49:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:24,085 INFO L225 Difference]: With dead ends: 94 [2022-03-19 07:49:24,085 INFO L226 Difference]: Without dead ends: 89 [2022-03-19 07:49:24,086 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3395, Invalid=4977, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 07:49:24,086 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 84 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:24,086 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 37 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-19 07:49:24,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-03-19 07:49:24,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:24,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-03-19 07:49:24,089 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2022-03-19 07:49:24,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:24,089 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-03-19 07:49:24,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:24,090 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-03-19 07:49:24,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-19 07:49:24,090 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:24,090 INFO L500 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:24,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:24,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:24,307 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:24,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:24,307 INFO L85 PathProgramCache]: Analyzing trace with hash 334127280, now seen corresponding path program 57 times [2022-03-19 07:49:24,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:24,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [872682916] [2022-03-19 07:49:24,308 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:24,308 INFO L85 PathProgramCache]: Analyzing trace with hash 334127280, now seen corresponding path program 58 times [2022-03-19 07:49:24,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:24,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166327348] [2022-03-19 07:49:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:24,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:24,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:24,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:24,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166327348] [2022-03-19 07:49:24,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166327348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:24,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122564004] [2022-03-19 07:49:24,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:49:24,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:24,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:24,679 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:24,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 07:49:24,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:49:24,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:24,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 07:49:24,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:24,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:25,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122564004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:25,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:25,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 54 [2022-03-19 07:49:25,227 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:25,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [872682916] [2022-03-19 07:49:25,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [872682916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:25,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:25,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-19 07:49:25,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069590730] [2022-03-19 07:49:25,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:25,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-19 07:49:25,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:25,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-19 07:49:25,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:49:25,228 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:25,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:25,756 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2022-03-19 07:49:25,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 07:49:25,756 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-03-19 07:49:25,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:25,757 INFO L225 Difference]: With dead ends: 96 [2022-03-19 07:49:25,757 INFO L226 Difference]: Without dead ends: 91 [2022-03-19 07:49:25,758 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3448, Invalid=5108, Unknown=0, NotChecked=0, Total=8556 [2022-03-19 07:49:25,759 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 74 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:25,759 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 32 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:25,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-19 07:49:25,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-19 07:49:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-03-19 07:49:25,762 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 87 [2022-03-19 07:49:25,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:25,762 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-03-19 07:49:25,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:25,763 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-03-19 07:49:25,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 07:49:25,763 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:25,763 INFO L500 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:25,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:25,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-19 07:49:25,964 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:25,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1119656755, now seen corresponding path program 59 times [2022-03-19 07:49:25,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:25,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [721591760] [2022-03-19 07:49:25,965 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:25,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1119656755, now seen corresponding path program 60 times [2022-03-19 07:49:25,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:25,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495627359] [2022-03-19 07:49:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:25,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:26,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:26,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:26,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495627359] [2022-03-19 07:49:26,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495627359] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:26,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846773181] [2022-03-19 07:49:26,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:49:26,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:26,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:26,321 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:26,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 07:49:26,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 07:49:26,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:26,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 07:49:26,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-03-19 07:49:26,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-03-19 07:49:26,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846773181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:26,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:26,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 4, 4] total 47 [2022-03-19 07:49:26,608 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:26,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [721591760] [2022-03-19 07:49:26,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [721591760] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:26,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:26,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-19 07:49:26,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781459409] [2022-03-19 07:49:26,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:26,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 07:49:26,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:26,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 07:49:26,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 07:49:26,610 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:27,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:27,169 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2022-03-19 07:49:27,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 07:49:27,169 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-03-19 07:49:27,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:27,175 INFO L225 Difference]: With dead ends: 98 [2022-03-19 07:49:27,175 INFO L226 Difference]: Without dead ends: 93 [2022-03-19 07:49:27,176 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2917, Invalid=4565, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 07:49:27,176 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 88 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:27,177 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 32 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:27,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-19 07:49:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-19 07:49:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:27,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-03-19 07:49:27,192 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 89 [2022-03-19 07:49:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:27,194 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-03-19 07:49:27,194 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:27,194 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-03-19 07:49:27,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 07:49:27,195 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:27,195 INFO L500 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:27,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:27,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-19 07:49:27,411 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:27,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:27,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1953224106, now seen corresponding path program 61 times [2022-03-19 07:49:27,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:27,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [8301145] [2022-03-19 07:49:27,413 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:27,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1953224106, now seen corresponding path program 62 times [2022-03-19 07:49:27,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:27,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468911934] [2022-03-19 07:49:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:27,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:27,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:27,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:27,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468911934] [2022-03-19 07:49:27,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468911934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:27,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158238276] [2022-03-19 07:49:27,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:49:27,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:27,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:27,991 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:27,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 07:49:28,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:49:28,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:28,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 07:49:28,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:28,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:28,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158238276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:28,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:28,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 54 [2022-03-19 07:49:28,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:28,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [8301145] [2022-03-19 07:49:28,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [8301145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:28,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:28,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-19 07:49:28,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521475286] [2022-03-19 07:49:28,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:28,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-19 07:49:28,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:28,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-19 07:49:28,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:49:28,589 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:29,360 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-03-19 07:49:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 07:49:29,361 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-03-19 07:49:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:29,361 INFO L225 Difference]: With dead ends: 100 [2022-03-19 07:49:29,361 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 07:49:29,364 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3554, Invalid=5376, Unknown=0, NotChecked=0, Total=8930 [2022-03-19 07:49:29,368 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:29,368 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 37 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:29,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 07:49:29,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-03-19 07:49:29,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-03-19 07:49:29,387 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 91 [2022-03-19 07:49:29,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:29,387 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-03-19 07:49:29,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:29,387 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-03-19 07:49:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-19 07:49:29,387 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:29,388 INFO L500 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:29,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:29,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 07:49:29,591 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:29,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:29,592 INFO L85 PathProgramCache]: Analyzing trace with hash 54231879, now seen corresponding path program 63 times [2022-03-19 07:49:29,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:29,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2129648486] [2022-03-19 07:49:29,593 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:29,593 INFO L85 PathProgramCache]: Analyzing trace with hash 54231879, now seen corresponding path program 64 times [2022-03-19 07:49:29,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:29,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193272358] [2022-03-19 07:49:29,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:29,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:29,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:29,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:29,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193272358] [2022-03-19 07:49:29,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193272358] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:29,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917195147] [2022-03-19 07:49:29,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:49:29,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:29,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:29,986 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:29,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 07:49:30,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:49:30,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:30,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 07:49:30,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:30,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:30,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917195147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:30,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:30,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 54 [2022-03-19 07:49:30,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:30,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2129648486] [2022-03-19 07:49:30,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2129648486] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:30,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:30,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-19 07:49:30,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716351851] [2022-03-19 07:49:30,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:30,413 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 07:49:30,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:30,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 07:49:30,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:49:30,414 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:31,137 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2022-03-19 07:49:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-19 07:49:31,138 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-19 07:49:31,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:31,139 INFO L225 Difference]: With dead ends: 102 [2022-03-19 07:49:31,139 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 07:49:31,140 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3607, Invalid=5513, Unknown=0, NotChecked=0, Total=9120 [2022-03-19 07:49:31,143 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 79 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:31,143 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 22 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 07:49:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-19 07:49:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-03-19 07:49:31,147 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 93 [2022-03-19 07:49:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:31,147 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-03-19 07:49:31,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:31,147 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-03-19 07:49:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-19 07:49:31,147 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:31,147 INFO L500 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:31,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-19 07:49:31,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 07:49:31,363 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:31,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:31,364 INFO L85 PathProgramCache]: Analyzing trace with hash 483802532, now seen corresponding path program 65 times [2022-03-19 07:49:31,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:31,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [675073842] [2022-03-19 07:49:31,365 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:31,365 INFO L85 PathProgramCache]: Analyzing trace with hash 483802532, now seen corresponding path program 66 times [2022-03-19 07:49:31,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:31,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141943303] [2022-03-19 07:49:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:31,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:31,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:31,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:31,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141943303] [2022-03-19 07:49:31,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141943303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:31,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992983278] [2022-03-19 07:49:31,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:49:31,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:31,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:31,769 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:31,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 07:49:31,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 07:49:31,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:31,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 07:49:31,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 99 proven. 1 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2022-03-19 07:49:31,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 99 proven. 1 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2022-03-19 07:49:31,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992983278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:31,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:31,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 4, 4] total 50 [2022-03-19 07:49:31,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:31,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [675073842] [2022-03-19 07:49:31,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [675073842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:31,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:31,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-19 07:49:31,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790463202] [2022-03-19 07:49:31,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:31,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-19 07:49:31,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:31,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-19 07:49:31,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 07:49:31,981 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:32,686 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2022-03-19 07:49:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 07:49:32,687 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-03-19 07:49:32,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:32,687 INFO L225 Difference]: With dead ends: 104 [2022-03-19 07:49:32,687 INFO L226 Difference]: Without dead ends: 99 [2022-03-19 07:49:32,689 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3328, Invalid=5228, Unknown=0, NotChecked=0, Total=8556 [2022-03-19 07:49:32,689 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 90 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:32,689 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 22 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-19 07:49:32,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-03-19 07:49:32,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-03-19 07:49:32,693 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 95 [2022-03-19 07:49:32,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:32,693 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-03-19 07:49:32,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:32,693 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-03-19 07:49:32,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 07:49:32,693 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:32,693 INFO L500 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:32,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:32,910 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-19 07:49:32,910 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:32,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:32,910 INFO L85 PathProgramCache]: Analyzing trace with hash 984339649, now seen corresponding path program 67 times [2022-03-19 07:49:32,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:32,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1098527220] [2022-03-19 07:49:32,911 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:32,911 INFO L85 PathProgramCache]: Analyzing trace with hash 984339649, now seen corresponding path program 68 times [2022-03-19 07:49:32,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:32,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639212427] [2022-03-19 07:49:32,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:32,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:33,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:33,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:33,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639212427] [2022-03-19 07:49:33,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639212427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:33,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022628473] [2022-03-19 07:49:33,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:49:33,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:33,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:33,655 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:33,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 07:49:33,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:49:33,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:33,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 07:49:33,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:33,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:34,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022628473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:34,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:34,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 54 [2022-03-19 07:49:34,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:34,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1098527220] [2022-03-19 07:49:34,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1098527220] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:34,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:34,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-19 07:49:34,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701973427] [2022-03-19 07:49:34,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:34,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 07:49:34,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:34,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 07:49:34,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:49:34,250 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:34,870 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2022-03-19 07:49:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 07:49:34,870 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-03-19 07:49:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:34,871 INFO L225 Difference]: With dead ends: 106 [2022-03-19 07:49:34,871 INFO L226 Difference]: Without dead ends: 101 [2022-03-19 07:49:34,872 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3713, Invalid=5793, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 07:49:34,872 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 83 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:34,872 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 37 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:34,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-19 07:49:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-19 07:49:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-03-19 07:49:34,879 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 97 [2022-03-19 07:49:34,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:34,879 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-03-19 07:49:34,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:34,879 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-03-19 07:49:34,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-19 07:49:34,880 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:34,880 INFO L500 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:34,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-19 07:49:35,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:35,095 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:35,096 INFO L85 PathProgramCache]: Analyzing trace with hash 964171934, now seen corresponding path program 69 times [2022-03-19 07:49:35,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:35,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2094222366] [2022-03-19 07:49:35,097 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:35,097 INFO L85 PathProgramCache]: Analyzing trace with hash 964171934, now seen corresponding path program 70 times [2022-03-19 07:49:35,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:35,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739592482] [2022-03-19 07:49:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:35,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:35,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:35,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:35,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739592482] [2022-03-19 07:49:35,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739592482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:35,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258437531] [2022-03-19 07:49:35,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:49:35,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:35,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:35,800 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:35,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 07:49:35,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:49:35,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:35,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-19 07:49:35,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:36,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:36,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258437531] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:36,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:36,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 54 [2022-03-19 07:49:36,371 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:36,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2094222366] [2022-03-19 07:49:36,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2094222366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:36,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:36,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-19 07:49:36,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612316963] [2022-03-19 07:49:36,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:36,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-19 07:49:36,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:36,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-19 07:49:36,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:49:36,373 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:37,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:37,394 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2022-03-19 07:49:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 07:49:37,394 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-03-19 07:49:37,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:37,395 INFO L225 Difference]: With dead ends: 108 [2022-03-19 07:49:37,395 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 07:49:37,396 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3766, Invalid=5936, Unknown=0, NotChecked=0, Total=9702 [2022-03-19 07:49:37,397 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:37,397 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 22 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:37,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 07:49:37,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-19 07:49:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:37,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-03-19 07:49:37,401 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 99 [2022-03-19 07:49:37,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:37,401 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-03-19 07:49:37,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:37,401 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-03-19 07:49:37,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-19 07:49:37,401 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:37,401 INFO L500 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:37,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:37,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-19 07:49:37,610 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:37,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1237132997, now seen corresponding path program 71 times [2022-03-19 07:49:37,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:37,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1554195096] [2022-03-19 07:49:37,612 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:37,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1237132997, now seen corresponding path program 72 times [2022-03-19 07:49:37,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:37,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470755813] [2022-03-19 07:49:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:37,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:38,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:38,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:38,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470755813] [2022-03-19 07:49:38,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470755813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:38,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578923439] [2022-03-19 07:49:38,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:49:38,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:38,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:38,350 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:38,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 07:49:38,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 07:49:38,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:38,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 07:49:38,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-03-19 07:49:38,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-03-19 07:49:38,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578923439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:38,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:38,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 53 [2022-03-19 07:49:38,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:38,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1554195096] [2022-03-19 07:49:38,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1554195096] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:38,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:38,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-19 07:49:38,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200327464] [2022-03-19 07:49:38,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:38,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 07:49:38,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:38,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 07:49:38,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 07:49:38,715 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:39,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:39,769 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2022-03-19 07:49:39,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-19 07:49:39,769 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-03-19 07:49:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:39,770 INFO L225 Difference]: With dead ends: 110 [2022-03-19 07:49:39,770 INFO L226 Difference]: Without dead ends: 105 [2022-03-19 07:49:39,771 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3766, Invalid=5936, Unknown=0, NotChecked=0, Total=9702 [2022-03-19 07:49:39,771 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 98 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:39,771 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 32 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:39,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-19 07:49:39,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-03-19 07:49:39,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:39,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-03-19 07:49:39,775 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 101 [2022-03-19 07:49:39,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:39,775 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-03-19 07:49:39,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:39,775 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-03-19 07:49:39,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 07:49:39,776 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:39,776 INFO L500 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:39,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:39,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:39,987 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:39,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:39,988 INFO L85 PathProgramCache]: Analyzing trace with hash 727705240, now seen corresponding path program 73 times [2022-03-19 07:49:39,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:39,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [829904004] [2022-03-19 07:49:39,989 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:39,989 INFO L85 PathProgramCache]: Analyzing trace with hash 727705240, now seen corresponding path program 74 times [2022-03-19 07:49:39,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:39,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106536732] [2022-03-19 07:49:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:39,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:40,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:40,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:40,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106536732] [2022-03-19 07:49:40,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106536732] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:40,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489506303] [2022-03-19 07:49:40,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:49:40,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:40,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:40,740 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:40,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 07:49:40,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:49:40,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:40,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 07:49:40,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:40,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:41,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489506303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:41,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:41,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 54 [2022-03-19 07:49:41,252 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:41,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [829904004] [2022-03-19 07:49:41,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [829904004] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:41,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:41,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-19 07:49:41,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445418759] [2022-03-19 07:49:41,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:41,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 07:49:41,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:41,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 07:49:41,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:49:41,253 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:42,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:42,345 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2022-03-19 07:49:42,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-19 07:49:42,345 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-03-19 07:49:42,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:42,345 INFO L225 Difference]: With dead ends: 112 [2022-03-19 07:49:42,345 INFO L226 Difference]: Without dead ends: 107 [2022-03-19 07:49:42,347 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3872, Invalid=6228, Unknown=0, NotChecked=0, Total=10100 [2022-03-19 07:49:42,347 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 87 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:42,347 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 32 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:42,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-19 07:49:42,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-03-19 07:49:42,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:42,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-03-19 07:49:42,351 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 103 [2022-03-19 07:49:42,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:42,351 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-03-19 07:49:42,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:42,351 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-03-19 07:49:42,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 07:49:42,351 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:42,351 INFO L500 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:42,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-19 07:49:42,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-19 07:49:42,563 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:42,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:42,564 INFO L85 PathProgramCache]: Analyzing trace with hash -848359243, now seen corresponding path program 75 times [2022-03-19 07:49:42,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:42,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1297308093] [2022-03-19 07:49:42,565 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:42,565 INFO L85 PathProgramCache]: Analyzing trace with hash -848359243, now seen corresponding path program 76 times [2022-03-19 07:49:42,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:42,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809651059] [2022-03-19 07:49:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:42,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:43,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:43,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:43,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809651059] [2022-03-19 07:49:43,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809651059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:43,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95146268] [2022-03-19 07:49:43,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:49:43,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:43,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:43,341 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:43,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 07:49:43,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:49:43,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:43,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 07:49:43,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:43,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:43,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95146268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:43,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:43,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 54 [2022-03-19 07:49:43,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:43,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1297308093] [2022-03-19 07:49:43,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1297308093] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:43,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:43,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-19 07:49:43,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095275243] [2022-03-19 07:49:43,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:43,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 07:49:43,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:43,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 07:49:43,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:49:43,815 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:44,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:44,975 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2022-03-19 07:49:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 07:49:44,975 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-03-19 07:49:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:44,976 INFO L225 Difference]: With dead ends: 114 [2022-03-19 07:49:44,976 INFO L226 Difference]: Without dead ends: 109 [2022-03-19 07:49:44,977 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3925, Invalid=6377, Unknown=0, NotChecked=0, Total=10302 [2022-03-19 07:49:44,977 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 114 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:44,978 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 32 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:44,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-19 07:49:44,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-19 07:49:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-03-19 07:49:44,981 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 105 [2022-03-19 07:49:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:44,982 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-03-19 07:49:44,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-03-19 07:49:44,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-19 07:49:44,982 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:44,982 INFO L500 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:45,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:45,188 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-19 07:49:45,188 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:45,189 INFO L85 PathProgramCache]: Analyzing trace with hash 677128082, now seen corresponding path program 77 times [2022-03-19 07:49:45,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:45,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [798383648] [2022-03-19 07:49:45,190 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:45,190 INFO L85 PathProgramCache]: Analyzing trace with hash 677128082, now seen corresponding path program 78 times [2022-03-19 07:49:45,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:45,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244823274] [2022-03-19 07:49:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:45,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:46,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:46,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:46,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244823274] [2022-03-19 07:49:46,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244823274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:46,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207827051] [2022-03-19 07:49:46,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:49:46,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:46,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:46,027 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:46,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 07:49:46,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 07:49:46,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:46,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 07:49:46,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 117 proven. 1 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-03-19 07:49:46,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 117 proven. 1 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-03-19 07:49:46,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207827051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:46,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:46,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 4, 4] total 56 [2022-03-19 07:49:46,331 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:46,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [798383648] [2022-03-19 07:49:46,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [798383648] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:46,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:46,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-19 07:49:46,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195870693] [2022-03-19 07:49:46,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:46,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-19 07:49:46,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:46,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-19 07:49:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 07:49:46,332 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:47,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:47,109 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2022-03-19 07:49:47,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-19 07:49:47,109 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-03-19 07:49:47,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:47,110 INFO L225 Difference]: With dead ends: 116 [2022-03-19 07:49:47,110 INFO L226 Difference]: Without dead ends: 111 [2022-03-19 07:49:47,111 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4231, Invalid=6689, Unknown=0, NotChecked=0, Total=10920 [2022-03-19 07:49:47,111 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 81 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:47,111 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 37 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-19 07:49:47,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-19 07:49:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-03-19 07:49:47,115 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 107 [2022-03-19 07:49:47,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:47,115 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-03-19 07:49:47,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:47,115 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-03-19 07:49:47,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-19 07:49:47,115 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:47,116 INFO L500 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:47,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:47,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-19 07:49:47,332 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:47,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:47,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2086599471, now seen corresponding path program 79 times [2022-03-19 07:49:47,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:47,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [110781000] [2022-03-19 07:49:47,333 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:47,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2086599471, now seen corresponding path program 80 times [2022-03-19 07:49:47,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:47,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796256730] [2022-03-19 07:49:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:47,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:47,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:47,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:47,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796256730] [2022-03-19 07:49:47,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796256730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:47,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702714689] [2022-03-19 07:49:47,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:49:47,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:47,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:47,980 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:47,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 07:49:48,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:49:48,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:48,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 07:49:48,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:48,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:48,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702714689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:48,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:48,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 54 [2022-03-19 07:49:48,271 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:48,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [110781000] [2022-03-19 07:49:48,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [110781000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:48,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:48,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-19 07:49:48,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839532104] [2022-03-19 07:49:48,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:48,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 07:49:48,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:48,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 07:49:48,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 07:49:48,273 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:49,052 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2022-03-19 07:49:49,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-19 07:49:49,053 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-03-19 07:49:49,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:49,053 INFO L225 Difference]: With dead ends: 118 [2022-03-19 07:49:49,053 INFO L226 Difference]: Without dead ends: 113 [2022-03-19 07:49:49,055 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:49:49,056 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 92 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:49,056 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 32 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:49,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-19 07:49:49,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-03-19 07:49:49,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2022-03-19 07:49:49,075 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 109 [2022-03-19 07:49:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:49,075 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2022-03-19 07:49:49,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:49,075 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2022-03-19 07:49:49,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 07:49:49,076 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:49,076 INFO L500 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:49,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-19 07:49:49,300 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-19 07:49:49,300 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:49,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:49,300 INFO L85 PathProgramCache]: Analyzing trace with hash -621061236, now seen corresponding path program 81 times [2022-03-19 07:49:49,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:49,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1812631213] [2022-03-19 07:49:49,301 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:49,301 INFO L85 PathProgramCache]: Analyzing trace with hash -621061236, now seen corresponding path program 82 times [2022-03-19 07:49:49,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:49,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246047139] [2022-03-19 07:49:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:49,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:49,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:49,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:49,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246047139] [2022-03-19 07:49:49,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246047139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:49,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612648409] [2022-03-19 07:49:49,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:49:49,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:49,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:49,874 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:49,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 07:49:49,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:49:49,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:49,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 07:49:49,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:50,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:52,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612648409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:52,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:52,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 104 [2022-03-19 07:49:52,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:52,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1812631213] [2022-03-19 07:49:52,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1812631213] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:52,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:52,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-19 07:49:52,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865483485] [2022-03-19 07:49:52,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:52,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 07:49:52,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:52,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 07:49:52,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:49:52,442 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 55 states, 55 states have (on average 1.9636363636363636) internal successors, (108), 54 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:53,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:53,663 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2022-03-19 07:49:53,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-19 07:49:53,663 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.9636363636363636) internal successors, (108), 54 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-03-19 07:49:53,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:53,664 INFO L225 Difference]: With dead ends: 118 [2022-03-19 07:49:53,664 INFO L226 Difference]: Without dead ends: 115 [2022-03-19 07:49:53,666 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=10612, Invalid=13568, Unknown=0, NotChecked=0, Total=24180 [2022-03-19 07:49:53,666 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 126 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:53,666 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 41 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:53,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-19 07:49:53,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-03-19 07:49:53,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:53,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-03-19 07:49:53,670 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2022-03-19 07:49:53,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:53,671 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-03-19 07:49:53,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.9636363636363636) internal successors, (108), 54 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:53,671 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-03-19 07:49:53,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 07:49:53,671 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:53,671 INFO L500 BasicCegarLoop]: trace histogram [43, 41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:53,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:53,888 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-19 07:49:53,889 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:53,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:53,889 INFO L85 PathProgramCache]: Analyzing trace with hash 153068166, now seen corresponding path program 83 times [2022-03-19 07:49:53,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:53,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [891985124] [2022-03-19 07:49:53,890 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:53,890 INFO L85 PathProgramCache]: Analyzing trace with hash 153068166, now seen corresponding path program 84 times [2022-03-19 07:49:53,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:53,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882082451] [2022-03-19 07:49:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:53,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:54,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:54,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:54,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882082451] [2022-03-19 07:49:54,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882082451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:54,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444726529] [2022-03-19 07:49:54,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:49:54,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:54,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:54,632 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:54,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 07:49:54,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-19 07:49:54,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:54,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 07:49:54,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 205 proven. 4 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-19 07:49:54,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 205 proven. 4 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-19 07:49:55,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444726529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:55,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:55,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 5, 5] total 59 [2022-03-19 07:49:55,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:55,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [891985124] [2022-03-19 07:49:55,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [891985124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:55,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:55,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-19 07:49:55,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120191553] [2022-03-19 07:49:55,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:55,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-19 07:49:55,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:55,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-19 07:49:55,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 07:49:55,040 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 56 states, 56 states have (on average 1.9642857142857142) internal successors, (110), 55 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:56,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:56,205 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2022-03-19 07:49:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-19 07:49:56,205 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9642857142857142) internal successors, (110), 55 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-03-19 07:49:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:56,206 INFO L225 Difference]: With dead ends: 120 [2022-03-19 07:49:56,206 INFO L226 Difference]: Without dead ends: 117 [2022-03-19 07:49:56,207 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4782, Invalid=7650, Unknown=0, NotChecked=0, Total=12432 [2022-03-19 07:49:56,207 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 148 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:56,208 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 31 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:56,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-19 07:49:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-03-19 07:49:56,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2022-03-19 07:49:56,211 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 113 [2022-03-19 07:49:56,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:56,212 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2022-03-19 07:49:56,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9642857142857142) internal successors, (110), 55 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:56,212 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2022-03-19 07:49:56,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 07:49:56,212 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:56,212 INFO L500 BasicCegarLoop]: trace histogram [44, 41, 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, 1, 1, 1] [2022-03-19 07:49:56,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 07:49:56,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-19 07:49:56,428 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:49:56,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:49:56,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1062081280, now seen corresponding path program 85 times [2022-03-19 07:49:56,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:56,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [707002406] [2022-03-19 07:49:56,430 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:49:56,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1062081280, now seen corresponding path program 86 times [2022-03-19 07:49:56,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:49:56,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350828310] [2022-03-19 07:49:56,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:49:56,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:49:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:57,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:49:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:49:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:57,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:49:57,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350828310] [2022-03-19 07:49:57,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350828310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:49:57,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867913444] [2022-03-19 07:49:57,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:49:57,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:49:57,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:49:57,347 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:49:57,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 07:49:57,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:49:57,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:49:57,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 07:49:57,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:49:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:57,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:49:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:49:58,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867913444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:49:58,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:49:58,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 104 [2022-03-19 07:49:58,860 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:49:58,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [707002406] [2022-03-19 07:49:58,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [707002406] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:49:58,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:49:58,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-19 07:49:58,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702610365] [2022-03-19 07:49:58,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:49:58,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 07:49:58,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:49:58,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 07:49:58,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:49:58,864 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 57 states, 57 states have (on average 1.9649122807017543) internal successors, (112), 56 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:59,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:49:59,824 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2022-03-19 07:49:59,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-19 07:49:59,824 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9649122807017543) internal successors, (112), 56 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-03-19 07:49:59,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:49:59,825 INFO L225 Difference]: With dead ends: 122 [2022-03-19 07:49:59,825 INFO L226 Difference]: Without dead ends: 119 [2022-03-19 07:49:59,828 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=10818, Invalid=13988, Unknown=0, NotChecked=0, Total=24806 [2022-03-19 07:49:59,828 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 136 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:49:59,828 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 36 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:49:59,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-19 07:49:59,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-03-19 07:49:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-03-19 07:49:59,833 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 115 [2022-03-19 07:49:59,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:49:59,833 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-03-19 07:49:59,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9649122807017543) internal successors, (112), 56 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:49:59,834 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-03-19 07:49:59,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-19 07:49:59,834 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:49:59,834 INFO L500 BasicCegarLoop]: trace histogram [45, 41, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:49:59,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-19 07:50:00,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-03-19 07:50:00,049 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:00,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1549644550, now seen corresponding path program 87 times [2022-03-19 07:50:00,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:00,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [326271356] [2022-03-19 07:50:00,055 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:50:00,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1549644550, now seen corresponding path program 88 times [2022-03-19 07:50:00,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:00,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643191951] [2022-03-19 07:50:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:00,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:00,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:00,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:00,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643191951] [2022-03-19 07:50:00,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643191951] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:50:00,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803526262] [2022-03-19 07:50:00,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:50:00,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:00,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:50:00,903 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:50:00,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 07:50:00,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:50:00,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:50:00,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 07:50:00,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:50:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:01,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:50:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:02,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803526262] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:50:02,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:50:02,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 104 [2022-03-19 07:50:02,818 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:02,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [326271356] [2022-03-19 07:50:02,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [326271356] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:02,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:02,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-19 07:50:02,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866345836] [2022-03-19 07:50:02,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:02,818 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-19 07:50:02,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:02,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-19 07:50:02,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:50:02,820 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 58 states, 58 states have (on average 1.9655172413793103) internal successors, (114), 57 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:03,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:03,774 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2022-03-19 07:50:03,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-19 07:50:03,775 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9655172413793103) internal successors, (114), 57 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-03-19 07:50:03,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:03,775 INFO L225 Difference]: With dead ends: 124 [2022-03-19 07:50:03,775 INFO L226 Difference]: Without dead ends: 121 [2022-03-19 07:50:03,777 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1835 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=10921, Invalid=14201, Unknown=0, NotChecked=0, Total=25122 [2022-03-19 07:50:03,777 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 138 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:03,777 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 41 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:50:03,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-19 07:50:03,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-03-19 07:50:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2022-03-19 07:50:03,781 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2022-03-19 07:50:03,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:03,781 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2022-03-19 07:50:03,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9655172413793103) internal successors, (114), 57 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:03,782 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2022-03-19 07:50:03,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-19 07:50:03,782 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:03,782 INFO L500 BasicCegarLoop]: trace histogram [46, 41, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:03,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-19 07:50:03,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:03,999 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:03,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:03,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1137700980, now seen corresponding path program 89 times [2022-03-19 07:50:03,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:03,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2043321410] [2022-03-19 07:50:04,000 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:50:04,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1137700980, now seen corresponding path program 90 times [2022-03-19 07:50:04,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:04,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569217965] [2022-03-19 07:50:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:04,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:04,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:04,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:04,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569217965] [2022-03-19 07:50:04,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569217965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:50:04,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779583218] [2022-03-19 07:50:04,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:50:04,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:04,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:50:04,856 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:50:04,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 07:50:04,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-03-19 07:50:04,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:50:04,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 07:50:04,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:50:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 451 proven. 25 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-19 07:50:05,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:50:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 451 proven. 25 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-19 07:50:05,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779583218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:50:05,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:50:05,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 8, 8] total 65 [2022-03-19 07:50:05,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:05,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2043321410] [2022-03-19 07:50:05,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2043321410] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:05,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:05,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-19 07:50:05,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229180664] [2022-03-19 07:50:05,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:05,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 07:50:05,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:05,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 07:50:05,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-03-19 07:50:05,345 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 59 states, 59 states have (on average 1.9661016949152543) internal successors, (116), 58 states have internal predecessors, (116), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:06,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:06,448 INFO L93 Difference]: Finished difference Result 126 states and 127 transitions. [2022-03-19 07:50:06,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-19 07:50:06,448 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.9661016949152543) internal successors, (116), 58 states have internal predecessors, (116), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-03-19 07:50:06,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:06,449 INFO L225 Difference]: With dead ends: 126 [2022-03-19 07:50:06,449 INFO L226 Difference]: Without dead ends: 123 [2022-03-19 07:50:06,450 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5658, Invalid=8862, Unknown=0, NotChecked=0, Total=14520 [2022-03-19 07:50:06,451 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 139 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:06,451 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 41 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:50:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-19 07:50:06,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-03-19 07:50:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:06,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2022-03-19 07:50:06,455 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 119 [2022-03-19 07:50:06,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:06,455 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2022-03-19 07:50:06,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.9661016949152543) internal successors, (116), 58 states have internal predecessors, (116), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:06,456 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2022-03-19 07:50:06,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-19 07:50:06,456 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:06,456 INFO L500 BasicCegarLoop]: trace histogram [47, 41, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:06,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-19 07:50:06,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-19 07:50:06,671 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:06,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:06,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1893556882, now seen corresponding path program 91 times [2022-03-19 07:50:06,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:06,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [563718425] [2022-03-19 07:50:06,672 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:50:06,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1893556882, now seen corresponding path program 92 times [2022-03-19 07:50:06,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:06,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206309212] [2022-03-19 07:50:06,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:06,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:07,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:07,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:07,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206309212] [2022-03-19 07:50:07,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206309212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:50:07,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666895267] [2022-03-19 07:50:07,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:50:07,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:07,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:50:07,542 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:50:07,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 07:50:07,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:50:07,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:50:07,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-19 07:50:07,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:50:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:07,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:50:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:09,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666895267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:50:09,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:50:09,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 104 [2022-03-19 07:50:09,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:09,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [563718425] [2022-03-19 07:50:09,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [563718425] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:09,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:09,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-19 07:50:09,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320889445] [2022-03-19 07:50:09,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:09,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-19 07:50:09,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:09,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-19 07:50:09,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:50:09,075 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 60 states, 60 states have (on average 1.9666666666666666) internal successors, (118), 59 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:10,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:10,082 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2022-03-19 07:50:10,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-19 07:50:10,082 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9666666666666666) internal successors, (118), 59 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-03-19 07:50:10,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:10,082 INFO L225 Difference]: With dead ends: 128 [2022-03-19 07:50:10,082 INFO L226 Difference]: Without dead ends: 125 [2022-03-19 07:50:10,085 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1948 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=11127, Invalid=14633, Unknown=0, NotChecked=0, Total=25760 [2022-03-19 07:50:10,085 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 152 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:10,085 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 36 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:50:10,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-19 07:50:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-03-19 07:50:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-03-19 07:50:10,090 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 121 [2022-03-19 07:50:10,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:10,090 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-03-19 07:50:10,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9666666666666666) internal successors, (118), 59 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:10,090 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-03-19 07:50:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-19 07:50:10,090 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:10,091 INFO L500 BasicCegarLoop]: trace histogram [48, 41, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:10,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-19 07:50:10,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:10,308 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:10,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:10,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1350431720, now seen corresponding path program 93 times [2022-03-19 07:50:10,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:10,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2016761732] [2022-03-19 07:50:10,309 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:50:10,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1350431720, now seen corresponding path program 94 times [2022-03-19 07:50:10,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:10,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766973132] [2022-03-19 07:50:10,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:10,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:11,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:11,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:11,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766973132] [2022-03-19 07:50:11,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766973132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:50:11,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49528163] [2022-03-19 07:50:11,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:50:11,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:11,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:50:11,231 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:50:11,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 07:50:11,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:50:11,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:50:11,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 07:50:11,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:50:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:11,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:50:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:13,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49528163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:50:13,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:50:13,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 104 [2022-03-19 07:50:13,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:13,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2016761732] [2022-03-19 07:50:13,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2016761732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:13,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:13,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-19 07:50:13,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126374015] [2022-03-19 07:50:13,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:13,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-19 07:50:13,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:13,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-19 07:50:13,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:50:13,682 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 61 states, 61 states have (on average 1.9672131147540983) internal successors, (120), 60 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:15,304 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2022-03-19 07:50:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-19 07:50:15,304 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9672131147540983) internal successors, (120), 60 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-03-19 07:50:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:15,305 INFO L225 Difference]: With dead ends: 130 [2022-03-19 07:50:15,305 INFO L226 Difference]: Without dead ends: 127 [2022-03-19 07:50:15,307 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11230, Invalid=14852, Unknown=0, NotChecked=0, Total=26082 [2022-03-19 07:50:15,308 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 173 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:15,308 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 26 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:50:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-19 07:50:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-03-19 07:50:15,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:15,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2022-03-19 07:50:15,312 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2022-03-19 07:50:15,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:15,312 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2022-03-19 07:50:15,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9672131147540983) internal successors, (120), 60 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2022-03-19 07:50:15,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-19 07:50:15,313 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:15,313 INFO L500 BasicCegarLoop]: trace histogram [49, 41, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:15,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-19 07:50:15,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:15,515 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:15,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:15,515 INFO L85 PathProgramCache]: Analyzing trace with hash 677221346, now seen corresponding path program 95 times [2022-03-19 07:50:15,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:15,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [739442841] [2022-03-19 07:50:15,516 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:50:15,516 INFO L85 PathProgramCache]: Analyzing trace with hash 677221346, now seen corresponding path program 96 times [2022-03-19 07:50:15,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:15,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432643620] [2022-03-19 07:50:15,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:15,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:16,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:16,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:16,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432643620] [2022-03-19 07:50:16,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432643620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:50:16,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736335524] [2022-03-19 07:50:16,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:50:16,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:16,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:50:16,724 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:50:16,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 07:50:16,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2022-03-19 07:50:16,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:50:16,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 07:50:16,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:50:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 697 proven. 64 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-19 07:50:16,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:50:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 697 proven. 64 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-19 07:50:17,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736335524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:50:17,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:50:17,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 11, 11] total 71 [2022-03-19 07:50:17,153 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:17,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [739442841] [2022-03-19 07:50:17,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [739442841] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:17,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:17,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-19 07:50:17,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528701155] [2022-03-19 07:50:17,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:17,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-19 07:50:17,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:17,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-19 07:50:17,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-03-19 07:50:17,155 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 62 states, 62 states have (on average 1.967741935483871) internal successors, (122), 61 states have internal predecessors, (122), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:18,336 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2022-03-19 07:50:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-19 07:50:18,336 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.967741935483871) internal successors, (122), 61 states have internal predecessors, (122), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-03-19 07:50:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:18,337 INFO L225 Difference]: With dead ends: 132 [2022-03-19 07:50:18,337 INFO L226 Difference]: Without dead ends: 129 [2022-03-19 07:50:18,338 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6606, Invalid=10164, Unknown=0, NotChecked=0, Total=16770 [2022-03-19 07:50:18,338 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 140 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:18,338 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 51 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:50:18,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-19 07:50:18,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-03-19 07:50:18,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:18,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2022-03-19 07:50:18,343 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 125 [2022-03-19 07:50:18,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:18,343 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2022-03-19 07:50:18,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.967741935483871) internal successors, (122), 61 states have internal predecessors, (122), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2022-03-19 07:50:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 07:50:18,344 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:18,344 INFO L500 BasicCegarLoop]: trace histogram [50, 41, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:18,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-19 07:50:18,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-19 07:50:18,560 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:18,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:18,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2032853668, now seen corresponding path program 97 times [2022-03-19 07:50:18,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:18,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [770412355] [2022-03-19 07:50:18,560 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:50:18,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2032853668, now seen corresponding path program 98 times [2022-03-19 07:50:18,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:18,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56678063] [2022-03-19 07:50:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:18,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:19,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:19,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:19,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56678063] [2022-03-19 07:50:19,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56678063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:50:19,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049770524] [2022-03-19 07:50:19,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:50:19,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:19,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:50:19,401 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:50:19,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 07:50:19,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:50:19,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:50:19,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 07:50:19,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:50:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:19,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:50:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:21,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049770524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:50:21,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:50:21,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 104 [2022-03-19 07:50:21,108 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:21,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [770412355] [2022-03-19 07:50:21,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [770412355] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:21,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:21,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-19 07:50:21,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57568051] [2022-03-19 07:50:21,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:21,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-19 07:50:21,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:21,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-19 07:50:21,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:50:21,110 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 63 states, 63 states have (on average 1.9682539682539681) internal successors, (124), 62 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:22,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:22,453 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2022-03-19 07:50:22,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-19 07:50:22,454 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9682539682539681) internal successors, (124), 62 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-03-19 07:50:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:22,454 INFO L225 Difference]: With dead ends: 134 [2022-03-19 07:50:22,454 INFO L226 Difference]: Without dead ends: 131 [2022-03-19 07:50:22,456 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2125 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=11436, Invalid=15296, Unknown=0, NotChecked=0, Total=26732 [2022-03-19 07:50:22,456 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 152 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:22,456 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 21 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:50:22,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-19 07:50:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-03-19 07:50:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2022-03-19 07:50:22,461 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 127 [2022-03-19 07:50:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:22,461 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2022-03-19 07:50:22,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9682539682539681) internal successors, (124), 62 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:22,461 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2022-03-19 07:50:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-19 07:50:22,462 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:22,462 INFO L500 BasicCegarLoop]: trace histogram [51, 41, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:22,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-19 07:50:22,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-19 07:50:22,678 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:22,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:22,679 INFO L85 PathProgramCache]: Analyzing trace with hash 630206550, now seen corresponding path program 99 times [2022-03-19 07:50:22,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:22,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1149582624] [2022-03-19 07:50:22,679 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:50:22,680 INFO L85 PathProgramCache]: Analyzing trace with hash 630206550, now seen corresponding path program 100 times [2022-03-19 07:50:22,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:22,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571480823] [2022-03-19 07:50:22,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:22,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:23,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:23,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:23,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571480823] [2022-03-19 07:50:23,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571480823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:50:23,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910819399] [2022-03-19 07:50:23,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:50:23,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:23,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:50:23,507 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:50:23,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 07:50:23,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:50:23,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:50:23,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-19 07:50:23,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:50:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:23,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:50:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:24,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910819399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:50:24,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:50:24,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 104 [2022-03-19 07:50:24,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:24,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1149582624] [2022-03-19 07:50:24,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1149582624] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:24,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:24,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-19 07:50:24,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799383189] [2022-03-19 07:50:24,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:24,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-19 07:50:24,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:24,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-19 07:50:24,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:50:24,916 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 64 states, 64 states have (on average 1.96875) internal successors, (126), 63 states have internal predecessors, (126), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:26,119 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2022-03-19 07:50:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-19 07:50:26,119 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.96875) internal successors, (126), 63 states have internal predecessors, (126), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-03-19 07:50:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:26,133 INFO L225 Difference]: With dead ends: 136 [2022-03-19 07:50:26,133 INFO L226 Difference]: Without dead ends: 133 [2022-03-19 07:50:26,135 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=11539, Invalid=15521, Unknown=0, NotChecked=0, Total=27060 [2022-03-19 07:50:26,151 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 154 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:26,151 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 41 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:50:26,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-19 07:50:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-03-19 07:50:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2022-03-19 07:50:26,157 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2022-03-19 07:50:26,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:26,158 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2022-03-19 07:50:26,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.96875) internal successors, (126), 63 states have internal predecessors, (126), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2022-03-19 07:50:26,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-19 07:50:26,158 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:26,158 INFO L500 BasicCegarLoop]: trace histogram [52, 41, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:26,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-19 07:50:26,361 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-19 07:50:26,361 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:26,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:26,362 INFO L85 PathProgramCache]: Analyzing trace with hash 30567632, now seen corresponding path program 101 times [2022-03-19 07:50:26,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:26,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1287927610] [2022-03-19 07:50:26,362 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:50:26,362 INFO L85 PathProgramCache]: Analyzing trace with hash 30567632, now seen corresponding path program 102 times [2022-03-19 07:50:26,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:26,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750804826] [2022-03-19 07:50:26,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:26,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:27,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:27,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:27,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750804826] [2022-03-19 07:50:27,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750804826] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:50:27,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117714145] [2022-03-19 07:50:27,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:50:27,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:27,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:50:27,658 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:50:27,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 07:50:27,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2022-03-19 07:50:27,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:50:27,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 07:50:27,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:50:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 121 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-19 07:50:27,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:50:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 121 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-19 07:50:28,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117714145] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:50:28,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:50:28,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 14, 14] total 77 [2022-03-19 07:50:28,300 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:28,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1287927610] [2022-03-19 07:50:28,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1287927610] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:28,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:28,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-19 07:50:28,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621754740] [2022-03-19 07:50:28,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:28,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-19 07:50:28,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:28,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-19 07:50:28,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-03-19 07:50:28,302 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 65 states, 65 states have (on average 1.9692307692307693) internal successors, (128), 64 states have internal predecessors, (128), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:29,434 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2022-03-19 07:50:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-19 07:50:29,434 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9692307692307693) internal successors, (128), 64 states have internal predecessors, (128), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-03-19 07:50:29,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:29,435 INFO L225 Difference]: With dead ends: 138 [2022-03-19 07:50:29,435 INFO L226 Difference]: Without dead ends: 135 [2022-03-19 07:50:29,435 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7626, Invalid=11556, Unknown=0, NotChecked=0, Total=19182 [2022-03-19 07:50:29,436 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 151 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:29,436 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 31 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:50:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-19 07:50:29,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-03-19 07:50:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2022-03-19 07:50:29,442 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 131 [2022-03-19 07:50:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:29,442 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2022-03-19 07:50:29,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9692307692307693) internal successors, (128), 64 states have internal predecessors, (128), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2022-03-19 07:50:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-19 07:50:29,442 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:29,442 INFO L500 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:29,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-19 07:50:29,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-19 07:50:29,655 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:29,656 INFO L85 PathProgramCache]: Analyzing trace with hash -696814902, now seen corresponding path program 103 times [2022-03-19 07:50:29,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:29,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1671318898] [2022-03-19 07:50:29,656 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:50:29,656 INFO L85 PathProgramCache]: Analyzing trace with hash -696814902, now seen corresponding path program 104 times [2022-03-19 07:50:29,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:29,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582154016] [2022-03-19 07:50:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:29,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:30,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:30,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:30,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582154016] [2022-03-19 07:50:30,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582154016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:50:30,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839529947] [2022-03-19 07:50:30,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:50:30,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:30,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:50:30,801 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:50:30,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-19 07:50:30,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:50:30,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:50:30,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-19 07:50:30,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:50:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:30,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:50:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:32,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839529947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:50:32,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:50:32,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 104 [2022-03-19 07:50:32,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:32,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1671318898] [2022-03-19 07:50:32,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1671318898] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:32,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:32,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-19 07:50:32,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640668714] [2022-03-19 07:50:32,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:32,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-19 07:50:32,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:32,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-19 07:50:32,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:50:32,205 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 66 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 65 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:33,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:33,398 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2022-03-19 07:50:33,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-19 07:50:33,398 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 65 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-03-19 07:50:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:33,399 INFO L225 Difference]: With dead ends: 140 [2022-03-19 07:50:33,399 INFO L226 Difference]: Without dead ends: 137 [2022-03-19 07:50:33,400 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2311 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=11745, Invalid=15977, Unknown=0, NotChecked=0, Total=27722 [2022-03-19 07:50:33,400 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 161 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:33,400 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 31 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:50:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-19 07:50:33,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-03-19 07:50:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2022-03-19 07:50:33,405 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 133 [2022-03-19 07:50:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:33,405 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2022-03-19 07:50:33,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 65 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:33,406 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2022-03-19 07:50:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 07:50:33,406 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:33,406 INFO L500 BasicCegarLoop]: trace histogram [54, 41, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:33,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-19 07:50:33,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-19 07:50:33,622 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:33,623 INFO L85 PathProgramCache]: Analyzing trace with hash 368239172, now seen corresponding path program 105 times [2022-03-19 07:50:33,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:33,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [908326976] [2022-03-19 07:50:33,624 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:50:33,624 INFO L85 PathProgramCache]: Analyzing trace with hash 368239172, now seen corresponding path program 106 times [2022-03-19 07:50:33,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:33,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816886477] [2022-03-19 07:50:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:33,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:34,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:34,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:34,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816886477] [2022-03-19 07:50:34,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816886477] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:50:34,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783493986] [2022-03-19 07:50:34,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:50:34,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:34,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:50:34,595 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:50:34,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-19 07:50:34,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:50:34,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:50:34,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-19 07:50:34,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:50:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:34,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:50:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:36,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783493986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:50:36,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:50:36,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 104 [2022-03-19 07:50:36,113 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:36,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [908326976] [2022-03-19 07:50:36,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [908326976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:36,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:36,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-19 07:50:36,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752744885] [2022-03-19 07:50:36,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:36,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-19 07:50:36,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:36,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-19 07:50:36,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:50:36,115 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 67 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 66 states have internal predecessors, (132), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:37,654 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2022-03-19 07:50:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-19 07:50:37,654 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 66 states have internal predecessors, (132), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-03-19 07:50:37,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:37,654 INFO L225 Difference]: With dead ends: 142 [2022-03-19 07:50:37,654 INFO L226 Difference]: Without dead ends: 139 [2022-03-19 07:50:37,656 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=11848, Invalid=16208, Unknown=0, NotChecked=0, Total=28056 [2022-03-19 07:50:37,656 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 172 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:37,656 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 36 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:50:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-19 07:50:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-03-19 07:50:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-03-19 07:50:37,662 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 135 [2022-03-19 07:50:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:37,662 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-03-19 07:50:37,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 66 states have internal predecessors, (132), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-03-19 07:50:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-19 07:50:37,663 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:37,663 INFO L500 BasicCegarLoop]: trace histogram [55, 41, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:37,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-19 07:50:37,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:37,880 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:37,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:37,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1682987838, now seen corresponding path program 107 times [2022-03-19 07:50:37,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:37,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1446490110] [2022-03-19 07:50:37,880 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:50:37,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1682987838, now seen corresponding path program 108 times [2022-03-19 07:50:37,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:37,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959030131] [2022-03-19 07:50:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:37,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:38,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:38,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:38,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959030131] [2022-03-19 07:50:38,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959030131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:50:38,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588779708] [2022-03-19 07:50:38,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:50:38,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:38,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:50:38,706 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:50:38,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-19 07:50:38,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-03-19 07:50:38,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:50:38,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 07:50:38,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:50:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 729 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2022-03-19 07:50:39,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:50:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 729 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2022-03-19 07:50:40,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588779708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:50:40,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:50:40,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 30, 30] total 103 [2022-03-19 07:50:40,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:40,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1446490110] [2022-03-19 07:50:40,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1446490110] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:40,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:40,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-19 07:50:40,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390472305] [2022-03-19 07:50:40,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:40,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-19 07:50:40,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:40,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-19 07:50:40,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 07:50:40,357 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 68 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 67 states have internal predecessors, (134), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:41,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:41,760 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2022-03-19 07:50:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-19 07:50:41,761 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 67 states have internal predecessors, (134), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-03-19 07:50:41,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:41,762 INFO L225 Difference]: With dead ends: 144 [2022-03-19 07:50:41,762 INFO L226 Difference]: Without dead ends: 141 [2022-03-19 07:50:41,763 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 239 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=11848, Invalid=16208, Unknown=0, NotChecked=0, Total=28056 [2022-03-19 07:50:41,764 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 189 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:41,764 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 26 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:50:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-19 07:50:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-03-19 07:50:41,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2022-03-19 07:50:41,781 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 137 [2022-03-19 07:50:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:41,781 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2022-03-19 07:50:41,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 67 states have internal predecessors, (134), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2022-03-19 07:50:41,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-19 07:50:41,782 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:41,782 INFO L500 BasicCegarLoop]: trace histogram [56, 41, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:41,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-19 07:50:41,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:41,995 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1858896456, now seen corresponding path program 109 times [2022-03-19 07:50:41,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:41,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1458582889] [2022-03-19 07:50:41,996 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:50:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1858896456, now seen corresponding path program 110 times [2022-03-19 07:50:41,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:41,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033319195] [2022-03-19 07:50:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:41,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:42,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:42,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:42,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033319195] [2022-03-19 07:50:42,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033319195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:50:42,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933833904] [2022-03-19 07:50:42,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:50:42,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:42,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:50:42,865 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:50:42,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-19 07:50:42,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:50:42,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:50:42,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 07:50:42,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:50:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:43,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:50:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:44,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933833904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:50:44,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:50:44,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 104 [2022-03-19 07:50:44,236 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:44,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1458582889] [2022-03-19 07:50:44,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1458582889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:44,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:44,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-19 07:50:44,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766579009] [2022-03-19 07:50:44,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:44,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-19 07:50:44,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:44,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-19 07:50:44,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:50:44,238 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 69 states, 69 states have (on average 1.9710144927536233) internal successors, (136), 68 states have internal predecessors, (136), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:45,539 INFO L93 Difference]: Finished difference Result 146 states and 147 transitions. [2022-03-19 07:50:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-19 07:50:45,539 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9710144927536233) internal successors, (136), 68 states have internal predecessors, (136), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-03-19 07:50:45,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:45,540 INFO L225 Difference]: With dead ends: 146 [2022-03-19 07:50:45,540 INFO L226 Difference]: Without dead ends: 143 [2022-03-19 07:50:45,543 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2506 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=12054, Invalid=16676, Unknown=0, NotChecked=0, Total=28730 [2022-03-19 07:50:45,543 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 170 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:45,543 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 41 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:50:45,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-19 07:50:45,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-03-19 07:50:45,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:45,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2022-03-19 07:50:45,549 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 139 [2022-03-19 07:50:45,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:45,549 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2022-03-19 07:50:45,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9710144927536233) internal successors, (136), 68 states have internal predecessors, (136), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2022-03-19 07:50:45,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-19 07:50:45,550 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:45,550 INFO L500 BasicCegarLoop]: trace histogram [57, 41, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:45,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-19 07:50:45,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:45,763 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:45,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:45,764 INFO L85 PathProgramCache]: Analyzing trace with hash 299362738, now seen corresponding path program 111 times [2022-03-19 07:50:45,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:45,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1607719610] [2022-03-19 07:50:45,764 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:50:45,764 INFO L85 PathProgramCache]: Analyzing trace with hash 299362738, now seen corresponding path program 112 times [2022-03-19 07:50:45,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:45,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369184329] [2022-03-19 07:50:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:45,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:46,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:46,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:46,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369184329] [2022-03-19 07:50:46,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369184329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:50:46,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183203319] [2022-03-19 07:50:46,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:50:46,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:46,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:50:46,679 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:50:46,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-19 07:50:46,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:50:46,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:50:46,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-19 07:50:46,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:50:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:46,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:50:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:48,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183203319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:50:48,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:50:48,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 104 [2022-03-19 07:50:48,394 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:48,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1607719610] [2022-03-19 07:50:48,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1607719610] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:48,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:48,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-19 07:50:48,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330368426] [2022-03-19 07:50:48,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:48,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-19 07:50:48,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:48,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-19 07:50:48,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:50:48,396 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 70 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 69 states have internal predecessors, (138), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:49,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:49,744 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2022-03-19 07:50:49,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-19 07:50:49,745 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 69 states have internal predecessors, (138), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-03-19 07:50:49,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:49,753 INFO L225 Difference]: With dead ends: 148 [2022-03-19 07:50:49,753 INFO L226 Difference]: Without dead ends: 145 [2022-03-19 07:50:49,755 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2573 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=12157, Invalid=16913, Unknown=0, NotChecked=0, Total=29070 [2022-03-19 07:50:49,755 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 170 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:49,759 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 56 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:50:49,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-19 07:50:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-03-19 07:50:49,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2022-03-19 07:50:49,789 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2022-03-19 07:50:49,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:49,789 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2022-03-19 07:50:49,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 69 states have internal predecessors, (138), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:49,790 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2022-03-19 07:50:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-19 07:50:49,790 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:49,790 INFO L500 BasicCegarLoop]: trace histogram [58, 41, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:49,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-19 07:50:50,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:50,003 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:50,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:50,004 INFO L85 PathProgramCache]: Analyzing trace with hash -82755796, now seen corresponding path program 113 times [2022-03-19 07:50:50,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:50,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2042284777] [2022-03-19 07:50:50,004 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:50:50,004 INFO L85 PathProgramCache]: Analyzing trace with hash -82755796, now seen corresponding path program 114 times [2022-03-19 07:50:50,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:50,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272524629] [2022-03-19 07:50:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:50,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:50,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:50,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:50,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272524629] [2022-03-19 07:50:50,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272524629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:50:50,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965118694] [2022-03-19 07:50:50,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:50:50,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:50,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:50:50,912 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:50:50,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-19 07:50:50,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 59 check-sat command(s) [2022-03-19 07:50:50,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:50:50,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 07:50:50,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:50:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1711 proven. 841 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-03-19 07:50:51,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:50:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1711 proven. 841 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-03-19 07:50:52,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965118694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:50:52,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:50:52,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 32, 32] total 103 [2022-03-19 07:50:52,166 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:52,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2042284777] [2022-03-19 07:50:52,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2042284777] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:52,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:52,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-19 07:50:52,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817703578] [2022-03-19 07:50:52,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:52,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-19 07:50:52,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:52,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-19 07:50:52,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 07:50:52,168 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 71 states, 71 states have (on average 1.971830985915493) internal successors, (140), 70 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:53,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:53,565 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2022-03-19 07:50:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-19 07:50:53,566 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.971830985915493) internal successors, (140), 70 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-19 07:50:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:53,577 INFO L225 Difference]: With dead ends: 150 [2022-03-19 07:50:53,577 INFO L226 Difference]: Without dead ends: 147 [2022-03-19 07:50:53,579 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 254 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2382 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=12157, Invalid=16913, Unknown=0, NotChecked=0, Total=29070 [2022-03-19 07:50:53,579 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 190 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:53,579 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 41 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:50:53,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-19 07:50:53,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-03-19 07:50:53,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:53,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2022-03-19 07:50:53,602 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 143 [2022-03-19 07:50:53,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:53,602 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2022-03-19 07:50:53,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.971830985915493) internal successors, (140), 70 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:53,602 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2022-03-19 07:50:53,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-19 07:50:53,603 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:53,603 INFO L500 BasicCegarLoop]: trace histogram [59, 41, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:53,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-19 07:50:53,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-19 07:50:53,820 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:53,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:53,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2068520486, now seen corresponding path program 115 times [2022-03-19 07:50:53,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:53,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [682605965] [2022-03-19 07:50:53,821 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:50:53,821 INFO L85 PathProgramCache]: Analyzing trace with hash 2068520486, now seen corresponding path program 116 times [2022-03-19 07:50:53,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:53,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768815946] [2022-03-19 07:50:53,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:53,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:54,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:54,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:54,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768815946] [2022-03-19 07:50:54,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768815946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:50:54,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114045565] [2022-03-19 07:50:54,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:50:54,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:54,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:50:54,922 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:50:54,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-19 07:50:54,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:50:54,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:50:54,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-19 07:50:54,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:50:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:55,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:50:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:56,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114045565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:50:56,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:50:56,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 104 [2022-03-19 07:50:56,526 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:50:56,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [682605965] [2022-03-19 07:50:56,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [682605965] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:50:56,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:50:56,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-19 07:50:56,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930187325] [2022-03-19 07:50:56,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:50:56,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-19 07:50:56,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:56,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-19 07:50:56,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:50:56,529 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 72 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 71 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:50:58,039 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2022-03-19 07:50:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-19 07:50:58,039 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 71 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-03-19 07:50:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:50:58,040 INFO L225 Difference]: With dead ends: 152 [2022-03-19 07:50:58,040 INFO L226 Difference]: Without dead ends: 149 [2022-03-19 07:50:58,043 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2710 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=12363, Invalid=17393, Unknown=0, NotChecked=0, Total=29756 [2022-03-19 07:50:58,043 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 183 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:50:58,043 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 26 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:50:58,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-19 07:50:58,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-03-19 07:50:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-03-19 07:50:58,059 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 145 [2022-03-19 07:50:58,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:50:58,059 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-03-19 07:50:58,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 71 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:50:58,059 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-03-19 07:50:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-19 07:50:58,060 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:50:58,060 INFO L500 BasicCegarLoop]: trace histogram [60, 41, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:50:58,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-19 07:50:58,277 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-19 07:50:58,278 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:50:58,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:50:58,278 INFO L85 PathProgramCache]: Analyzing trace with hash -729209184, now seen corresponding path program 117 times [2022-03-19 07:50:58,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:50:58,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [315607627] [2022-03-19 07:50:58,278 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:50:58,278 INFO L85 PathProgramCache]: Analyzing trace with hash -729209184, now seen corresponding path program 118 times [2022-03-19 07:50:58,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:50:58,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698805241] [2022-03-19 07:50:58,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:50:58,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:50:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:59,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:50:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:50:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:59,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:50:59,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698805241] [2022-03-19 07:50:59,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698805241] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:50:59,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002388813] [2022-03-19 07:50:59,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:50:59,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:50:59,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:50:59,277 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:50:59,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-19 07:50:59,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:50:59,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:50:59,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 07:50:59,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:50:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:50:59,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:51:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:01,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002388813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:51:01,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:51:01,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 104 [2022-03-19 07:51:01,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:01,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [315607627] [2022-03-19 07:51:01,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [315607627] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:01,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:01,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-19 07:51:01,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528212026] [2022-03-19 07:51:01,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:01,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-19 07:51:01,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:01,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-19 07:51:01,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:51:01,296 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 73 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 72 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:02,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:51:02,996 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2022-03-19 07:51:02,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-19 07:51:02,997 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 72 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-03-19 07:51:02,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:51:02,997 INFO L225 Difference]: With dead ends: 154 [2022-03-19 07:51:02,997 INFO L226 Difference]: Without dead ends: 151 [2022-03-19 07:51:02,999 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=12466, Invalid=17636, Unknown=0, NotChecked=0, Total=30102 [2022-03-19 07:51:02,999 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 164 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:51:02,999 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 46 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:51:02,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-19 07:51:03,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-03-19 07:51:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2022-03-19 07:51:03,007 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2022-03-19 07:51:03,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:51:03,007 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2022-03-19 07:51:03,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 72 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2022-03-19 07:51:03,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-19 07:51:03,007 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:51:03,007 INFO L500 BasicCegarLoop]: trace histogram [61, 41, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:51:03,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-19 07:51:03,217 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-19 07:51:03,217 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:51:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:51:03,218 INFO L85 PathProgramCache]: Analyzing trace with hash -697894758, now seen corresponding path program 119 times [2022-03-19 07:51:03,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:03,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1716574886] [2022-03-19 07:51:03,218 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:51:03,218 INFO L85 PathProgramCache]: Analyzing trace with hash -697894758, now seen corresponding path program 120 times [2022-03-19 07:51:03,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:51:03,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048898689] [2022-03-19 07:51:03,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:51:03,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:51:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:04,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:51:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:04,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:51:04,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048898689] [2022-03-19 07:51:04,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048898689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:51:04,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566229870] [2022-03-19 07:51:04,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:51:04,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:04,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:51:04,248 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:51:04,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-19 07:51:04,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2022-03-19 07:51:04,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:51:04,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 07:51:04,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:51:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1891 proven. 900 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2022-03-19 07:51:04,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:51:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1891 proven. 900 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2022-03-19 07:51:05,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566229870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:51:05,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:51:05,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 33, 33] total 103 [2022-03-19 07:51:05,807 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:05,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1716574886] [2022-03-19 07:51:05,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1716574886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:05,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:05,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-19 07:51:05,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249050126] [2022-03-19 07:51:05,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:05,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-19 07:51:05,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:05,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-19 07:51:05,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 07:51:05,809 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 74 states, 74 states have (on average 1.972972972972973) internal successors, (146), 73 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:07,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:51:07,455 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2022-03-19 07:51:07,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-19 07:51:07,462 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.972972972972973) internal successors, (146), 73 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-03-19 07:51:07,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:51:07,463 INFO L225 Difference]: With dead ends: 156 [2022-03-19 07:51:07,463 INFO L226 Difference]: Without dead ends: 153 [2022-03-19 07:51:07,465 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 269 SyntacticMatches, 2 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=12466, Invalid=17636, Unknown=0, NotChecked=0, Total=30102 [2022-03-19 07:51:07,466 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 168 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:51:07,466 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 31 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:51:07,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-19 07:51:07,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2022-03-19 07:51:07,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2022-03-19 07:51:07,473 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 149 [2022-03-19 07:51:07,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:51:07,473 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2022-03-19 07:51:07,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.972972972972973) internal successors, (146), 73 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:07,473 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2022-03-19 07:51:07,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-19 07:51:07,474 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:51:07,474 INFO L500 BasicCegarLoop]: trace histogram [62, 41, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:51:07,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-19 07:51:07,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:07,693 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:51:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:51:07,693 INFO L85 PathProgramCache]: Analyzing trace with hash -669502444, now seen corresponding path program 121 times [2022-03-19 07:51:07,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:07,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [983389464] [2022-03-19 07:51:07,694 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:51:07,694 INFO L85 PathProgramCache]: Analyzing trace with hash -669502444, now seen corresponding path program 122 times [2022-03-19 07:51:07,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:51:07,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42440321] [2022-03-19 07:51:07,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:51:07,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:51:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:08,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:51:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:08,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:51:08,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42440321] [2022-03-19 07:51:08,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42440321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:51:08,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967950532] [2022-03-19 07:51:08,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:51:08,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:08,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:51:08,670 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:51:08,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-19 07:51:08,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:51:08,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:51:08,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-19 07:51:08,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:51:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:08,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:51:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:10,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967950532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:51:10,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:51:10,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 104 [2022-03-19 07:51:10,475 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:10,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [983389464] [2022-03-19 07:51:10,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [983389464] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:10,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:10,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-19 07:51:10,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095957486] [2022-03-19 07:51:10,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:10,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-19 07:51:10,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:10,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-19 07:51:10,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:51:10,477 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 75 states, 75 states have (on average 1.9733333333333334) internal successors, (148), 74 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:12,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:51:12,051 INFO L93 Difference]: Finished difference Result 158 states and 159 transitions. [2022-03-19 07:51:12,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-19 07:51:12,051 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9733333333333334) internal successors, (148), 74 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-03-19 07:51:12,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:51:12,052 INFO L225 Difference]: With dead ends: 158 [2022-03-19 07:51:12,052 INFO L226 Difference]: Without dead ends: 155 [2022-03-19 07:51:12,053 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2923 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=12672, Invalid=18128, Unknown=0, NotChecked=0, Total=30800 [2022-03-19 07:51:12,054 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 182 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:51:12,054 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 31 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:51:12,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-19 07:51:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-03-19 07:51:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2022-03-19 07:51:12,062 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 151 [2022-03-19 07:51:12,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:51:12,062 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2022-03-19 07:51:12,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9733333333333334) internal successors, (148), 74 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:12,062 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2022-03-19 07:51:12,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-19 07:51:12,062 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:51:12,062 INFO L500 BasicCegarLoop]: trace histogram [63, 41, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:51:12,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-19 07:51:12,272 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:12,272 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:51:12,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:51:12,272 INFO L85 PathProgramCache]: Analyzing trace with hash 845707534, now seen corresponding path program 123 times [2022-03-19 07:51:12,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:12,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [917753923] [2022-03-19 07:51:12,273 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:51:12,273 INFO L85 PathProgramCache]: Analyzing trace with hash 845707534, now seen corresponding path program 124 times [2022-03-19 07:51:12,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:51:12,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858074122] [2022-03-19 07:51:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:51:12,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:51:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:13,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:51:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:13,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:51:13,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858074122] [2022-03-19 07:51:13,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858074122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:51:13,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766454470] [2022-03-19 07:51:13,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:51:13,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:13,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:51:13,744 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:51:13,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-19 07:51:13,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:51:13,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:51:13,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-19 07:51:13,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:51:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:14,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:51:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:15,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766454470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:51:15,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:51:15,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 104 [2022-03-19 07:51:15,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:15,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [917753923] [2022-03-19 07:51:15,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [917753923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:15,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:15,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-19 07:51:15,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774992206] [2022-03-19 07:51:15,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:15,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-19 07:51:15,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:15,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-19 07:51:15,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:51:15,455 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 76 states, 76 states have (on average 1.9736842105263157) internal successors, (150), 75 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:51:17,668 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2022-03-19 07:51:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-19 07:51:17,669 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9736842105263157) internal successors, (150), 75 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-03-19 07:51:17,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:51:17,669 INFO L225 Difference]: With dead ends: 160 [2022-03-19 07:51:17,669 INFO L226 Difference]: Without dead ends: 157 [2022-03-19 07:51:17,672 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2996 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=12775, Invalid=18377, Unknown=0, NotChecked=0, Total=31152 [2022-03-19 07:51:17,672 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 177 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:51:17,672 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 41 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:51:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-19 07:51:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-03-19 07:51:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2022-03-19 07:51:17,698 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 153 [2022-03-19 07:51:17,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:51:17,698 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2022-03-19 07:51:17,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.9736842105263157) internal successors, (150), 75 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2022-03-19 07:51:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-19 07:51:17,699 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:51:17,699 INFO L500 BasicCegarLoop]: trace histogram [64, 41, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:51:17,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-19 07:51:17,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-19 07:51:17,907 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:51:17,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:51:17,907 INFO L85 PathProgramCache]: Analyzing trace with hash 968583048, now seen corresponding path program 125 times [2022-03-19 07:51:17,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:17,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1980951214] [2022-03-19 07:51:17,908 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:51:17,908 INFO L85 PathProgramCache]: Analyzing trace with hash 968583048, now seen corresponding path program 126 times [2022-03-19 07:51:17,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:51:17,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450041472] [2022-03-19 07:51:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:51:17,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:51:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:18,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:51:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:18,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:51:18,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450041472] [2022-03-19 07:51:18,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450041472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:51:18,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006073785] [2022-03-19 07:51:18,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:51:18,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:18,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:51:18,934 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:51:18,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-19 07:51:19,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2022-03-19 07:51:19,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:51:19,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 07:51:19,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:51:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2080 proven. 1024 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-03-19 07:51:19,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:51:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2080 proven. 1024 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-03-19 07:51:20,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006073785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:51:20,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:51:20,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 35, 35] total 103 [2022-03-19 07:51:20,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:20,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1980951214] [2022-03-19 07:51:20,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1980951214] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:20,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:20,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-19 07:51:20,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998861885] [2022-03-19 07:51:20,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:20,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-19 07:51:20,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:20,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-19 07:51:20,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 07:51:20,220 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 77 states, 77 states have (on average 1.974025974025974) internal successors, (152), 76 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:21,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:51:21,819 INFO L93 Difference]: Finished difference Result 162 states and 163 transitions. [2022-03-19 07:51:21,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-19 07:51:21,819 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.974025974025974) internal successors, (152), 76 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-03-19 07:51:21,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:51:21,820 INFO L225 Difference]: With dead ends: 162 [2022-03-19 07:51:21,820 INFO L226 Difference]: Without dead ends: 159 [2022-03-19 07:51:21,821 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 284 SyntacticMatches, 2 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2814 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=12775, Invalid=18377, Unknown=0, NotChecked=0, Total=31152 [2022-03-19 07:51:21,822 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 171 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:51:21,822 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 41 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:51:21,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-19 07:51:21,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-03-19 07:51:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2022-03-19 07:51:21,830 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 155 [2022-03-19 07:51:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:51:21,830 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2022-03-19 07:51:21,830 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.974025974025974) internal successors, (152), 76 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2022-03-19 07:51:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-19 07:51:21,831 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:51:21,831 INFO L500 BasicCegarLoop]: trace histogram [65, 41, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:51:21,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-19 07:51:22,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:22,048 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:51:22,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:51:22,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1207132286, now seen corresponding path program 127 times [2022-03-19 07:51:22,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:22,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [412201554] [2022-03-19 07:51:22,048 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:51:22,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1207132286, now seen corresponding path program 128 times [2022-03-19 07:51:22,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:51:22,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812220623] [2022-03-19 07:51:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:51:22,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:51:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:23,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:51:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:23,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:51:23,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812220623] [2022-03-19 07:51:23,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812220623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:51:23,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991471194] [2022-03-19 07:51:23,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:51:23,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:23,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:51:23,485 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:51:23,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-19 07:51:23,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:51:23,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:51:23,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-19 07:51:23,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:51:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:23,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:51:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:24,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991471194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:51:24,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:51:24,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 104 [2022-03-19 07:51:24,608 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:24,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [412201554] [2022-03-19 07:51:24,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [412201554] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:24,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:24,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-19 07:51:24,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442038549] [2022-03-19 07:51:24,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:24,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-19 07:51:24,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:24,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-19 07:51:24,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:51:24,613 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand has 78 states, 78 states have (on average 1.9743589743589745) internal successors, (154), 77 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:26,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:51:26,275 INFO L93 Difference]: Finished difference Result 164 states and 165 transitions. [2022-03-19 07:51:26,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-19 07:51:26,275 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9743589743589745) internal successors, (154), 77 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-03-19 07:51:26,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:51:26,276 INFO L225 Difference]: With dead ends: 164 [2022-03-19 07:51:26,276 INFO L226 Difference]: Without dead ends: 161 [2022-03-19 07:51:26,277 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3145 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=12981, Invalid=18881, Unknown=0, NotChecked=0, Total=31862 [2022-03-19 07:51:26,278 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 186 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:51:26,278 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 21 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:51:26,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-19 07:51:26,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-03-19 07:51:26,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:26,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2022-03-19 07:51:26,302 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 157 [2022-03-19 07:51:26,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:51:26,302 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2022-03-19 07:51:26,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.9743589743589745) internal successors, (154), 77 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:26,302 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2022-03-19 07:51:26,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-19 07:51:26,302 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:51:26,303 INFO L500 BasicCegarLoop]: trace histogram [66, 41, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:51:26,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-19 07:51:26,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:26,503 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:51:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:51:26,503 INFO L85 PathProgramCache]: Analyzing trace with hash -420495108, now seen corresponding path program 129 times [2022-03-19 07:51:26,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:26,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1128247685] [2022-03-19 07:51:26,504 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:51:26,504 INFO L85 PathProgramCache]: Analyzing trace with hash -420495108, now seen corresponding path program 130 times [2022-03-19 07:51:26,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:51:26,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085270761] [2022-03-19 07:51:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:51:26,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:51:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:27,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:51:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:27,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:51:27,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085270761] [2022-03-19 07:51:27,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085270761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:51:27,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551861928] [2022-03-19 07:51:27,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:51:27,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:27,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:51:27,702 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:51:27,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-19 07:51:27,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:51:27,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:51:27,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-19 07:51:27,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:51:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:28,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:51:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:29,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551861928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:51:29,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:51:29,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 104 [2022-03-19 07:51:29,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:29,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1128247685] [2022-03-19 07:51:29,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1128247685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:29,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:29,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-19 07:51:29,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213942585] [2022-03-19 07:51:29,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:29,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-19 07:51:29,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:29,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-19 07:51:29,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:51:29,296 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 79 states, 79 states have (on average 1.9746835443037976) internal successors, (156), 78 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:30,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:51:30,993 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2022-03-19 07:51:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-19 07:51:30,993 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.9746835443037976) internal successors, (156), 78 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-03-19 07:51:30,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:51:30,994 INFO L225 Difference]: With dead ends: 166 [2022-03-19 07:51:30,994 INFO L226 Difference]: Without dead ends: 163 [2022-03-19 07:51:30,996 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3221 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=13084, Invalid=19136, Unknown=0, NotChecked=0, Total=32220 [2022-03-19 07:51:30,996 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 181 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:51:30,996 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 36 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:51:30,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-19 07:51:31,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-03-19 07:51:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2022-03-19 07:51:31,006 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2022-03-19 07:51:31,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:51:31,006 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2022-03-19 07:51:31,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.9746835443037976) internal successors, (156), 78 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:31,006 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2022-03-19 07:51:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-19 07:51:31,007 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:51:31,007 INFO L500 BasicCegarLoop]: trace histogram [67, 41, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:51:31,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-19 07:51:31,208 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-03-19 07:51:31,209 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:51:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:51:31,209 INFO L85 PathProgramCache]: Analyzing trace with hash -376411146, now seen corresponding path program 131 times [2022-03-19 07:51:31,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:31,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1322252247] [2022-03-19 07:51:31,209 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:51:31,209 INFO L85 PathProgramCache]: Analyzing trace with hash -376411146, now seen corresponding path program 132 times [2022-03-19 07:51:31,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:51:31,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538757853] [2022-03-19 07:51:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:51:31,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:51:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:32,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:51:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:32,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:51:32,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538757853] [2022-03-19 07:51:32,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538757853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:51:32,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047250641] [2022-03-19 07:51:32,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:51:32,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:32,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:51:32,928 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:51:32,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-19 07:51:33,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2022-03-19 07:51:33,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:51:33,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 07:51:33,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:51:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2278 proven. 1089 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2022-03-19 07:51:33,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:51:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2278 proven. 1089 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2022-03-19 07:51:34,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047250641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:51:34,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:51:34,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 36, 36] total 103 [2022-03-19 07:51:34,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:34,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1322252247] [2022-03-19 07:51:34,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1322252247] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:34,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:34,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-19 07:51:34,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181540440] [2022-03-19 07:51:34,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:34,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-19 07:51:34,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:34,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-19 07:51:34,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 07:51:34,501 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 80 states, 80 states have (on average 1.975) internal successors, (158), 79 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:37,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:51:37,067 INFO L93 Difference]: Finished difference Result 168 states and 169 transitions. [2022-03-19 07:51:37,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-19 07:51:37,067 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.975) internal successors, (158), 79 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-03-19 07:51:37,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:51:37,068 INFO L225 Difference]: With dead ends: 168 [2022-03-19 07:51:37,068 INFO L226 Difference]: Without dead ends: 165 [2022-03-19 07:51:37,069 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 299 SyntacticMatches, 2 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3044 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13084, Invalid=19136, Unknown=0, NotChecked=0, Total=32220 [2022-03-19 07:51:37,070 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 170 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:51:37,070 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 41 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:51:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-19 07:51:37,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-03-19 07:51:37,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:37,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2022-03-19 07:51:37,079 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 161 [2022-03-19 07:51:37,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:51:37,079 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2022-03-19 07:51:37,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.975) internal successors, (158), 79 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2022-03-19 07:51:37,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-19 07:51:37,080 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:51:37,080 INFO L500 BasicCegarLoop]: trace histogram [68, 41, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:51:37,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-19 07:51:37,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:37,295 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:51:37,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:51:37,296 INFO L85 PathProgramCache]: Analyzing trace with hash -961396624, now seen corresponding path program 133 times [2022-03-19 07:51:37,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:37,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [849218280] [2022-03-19 07:51:37,296 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:51:37,296 INFO L85 PathProgramCache]: Analyzing trace with hash -961396624, now seen corresponding path program 134 times [2022-03-19 07:51:37,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:51:37,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118830578] [2022-03-19 07:51:37,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:51:37,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:51:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:38,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:51:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:38,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:51:38,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118830578] [2022-03-19 07:51:38,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118830578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:51:38,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158967243] [2022-03-19 07:51:38,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:51:38,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:38,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:51:38,467 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:51:38,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-19 07:51:38,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:51:38,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:51:38,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-19 07:51:38,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:51:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:38,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:51:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:39,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158967243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:51:39,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:51:39,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 104 [2022-03-19 07:51:39,544 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:39,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [849218280] [2022-03-19 07:51:39,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [849218280] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:39,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:39,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-19 07:51:39,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826509601] [2022-03-19 07:51:39,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:39,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-19 07:51:39,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:39,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-19 07:51:39,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:51:39,546 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 81 states, 81 states have (on average 1.9753086419753085) internal successors, (160), 80 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:41,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:51:41,414 INFO L93 Difference]: Finished difference Result 170 states and 171 transitions. [2022-03-19 07:51:41,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-19 07:51:41,415 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9753086419753085) internal successors, (160), 80 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-03-19 07:51:41,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:51:41,415 INFO L225 Difference]: With dead ends: 170 [2022-03-19 07:51:41,415 INFO L226 Difference]: Without dead ends: 167 [2022-03-19 07:51:41,417 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3376 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=13290, Invalid=19652, Unknown=0, NotChecked=0, Total=32942 [2022-03-19 07:51:41,417 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 210 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:51:41,417 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 46 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:51:41,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-19 07:51:41,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-03-19 07:51:41,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 162 states have internal predecessors, (164), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:41,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2022-03-19 07:51:41,427 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 163 [2022-03-19 07:51:41,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:51:41,427 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2022-03-19 07:51:41,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9753086419753085) internal successors, (160), 80 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:41,427 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2022-03-19 07:51:41,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-19 07:51:41,428 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:51:41,428 INFO L500 BasicCegarLoop]: trace histogram [69, 41, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:51:41,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-19 07:51:41,645 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-19 07:51:41,645 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:51:41,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:51:41,646 INFO L85 PathProgramCache]: Analyzing trace with hash -491725206, now seen corresponding path program 135 times [2022-03-19 07:51:41,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:41,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [104882884] [2022-03-19 07:51:41,646 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:51:41,646 INFO L85 PathProgramCache]: Analyzing trace with hash -491725206, now seen corresponding path program 136 times [2022-03-19 07:51:41,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:51:41,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535804981] [2022-03-19 07:51:41,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:51:41,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:51:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:43,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:51:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:43,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:51:43,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535804981] [2022-03-19 07:51:43,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535804981] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:51:43,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009477276] [2022-03-19 07:51:43,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:51:43,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:43,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:51:43,652 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:51:43,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-19 07:51:43,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:51:43,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:51:43,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-19 07:51:43,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:51:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:43,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:51:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:44,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009477276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:51:44,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:51:44,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 104 [2022-03-19 07:51:44,798 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:44,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [104882884] [2022-03-19 07:51:44,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [104882884] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:44,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:44,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-19 07:51:44,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293595530] [2022-03-19 07:51:44,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:44,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-19 07:51:44,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:44,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-19 07:51:44,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:51:44,800 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 82 states, 82 states have (on average 1.975609756097561) internal successors, (162), 81 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:46,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:51:46,724 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2022-03-19 07:51:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-19 07:51:46,724 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.975609756097561) internal successors, (162), 81 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-03-19 07:51:46,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:51:46,724 INFO L225 Difference]: With dead ends: 172 [2022-03-19 07:51:46,724 INFO L226 Difference]: Without dead ends: 169 [2022-03-19 07:51:46,726 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 309 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3455 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=13393, Invalid=19913, Unknown=0, NotChecked=0, Total=33306 [2022-03-19 07:51:46,726 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 180 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:51:46,726 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 31 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:51:46,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-19 07:51:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-03-19 07:51:46,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2022-03-19 07:51:46,741 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2022-03-19 07:51:46,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:51:46,741 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2022-03-19 07:51:46,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.975609756097561) internal successors, (162), 81 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2022-03-19 07:51:46,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-19 07:51:46,742 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:51:46,742 INFO L500 BasicCegarLoop]: trace histogram [70, 41, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:51:46,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-19 07:51:46,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-19 07:51:46,960 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:51:46,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:51:46,960 INFO L85 PathProgramCache]: Analyzing trace with hash -109058588, now seen corresponding path program 137 times [2022-03-19 07:51:46,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:46,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [632853231] [2022-03-19 07:51:46,961 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:51:46,961 INFO L85 PathProgramCache]: Analyzing trace with hash -109058588, now seen corresponding path program 138 times [2022-03-19 07:51:46,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:51:46,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106608410] [2022-03-19 07:51:46,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:51:46,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:51:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:48,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:51:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:48,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:51:48,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106608410] [2022-03-19 07:51:48,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106608410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:51:48,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171846171] [2022-03-19 07:51:48,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:51:48,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:48,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:51:48,366 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:51:48,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-19 07:51:48,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2022-03-19 07:51:48,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:51:48,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 07:51:48,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:51:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2485 proven. 1225 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-03-19 07:51:48,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:51:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2485 proven. 1225 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-03-19 07:51:49,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171846171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:51:49,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:51:49,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 38, 38] total 103 [2022-03-19 07:51:49,547 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:49,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [632853231] [2022-03-19 07:51:49,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [632853231] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:49,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:49,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-19 07:51:49,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112748773] [2022-03-19 07:51:49,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:49,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-19 07:51:49,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:49,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-19 07:51:49,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 07:51:49,549 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 83 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 82 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:51,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:51:51,370 INFO L93 Difference]: Finished difference Result 174 states and 175 transitions. [2022-03-19 07:51:51,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-19 07:51:51,371 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 82 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-03-19 07:51:51,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:51:51,371 INFO L225 Difference]: With dead ends: 174 [2022-03-19 07:51:51,371 INFO L226 Difference]: Without dead ends: 171 [2022-03-19 07:51:51,373 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 314 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=13393, Invalid=19913, Unknown=0, NotChecked=0, Total=33306 [2022-03-19 07:51:51,373 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 200 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:51:51,373 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 21 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:51:51,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-19 07:51:51,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-03-19 07:51:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2022-03-19 07:51:51,384 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 167 [2022-03-19 07:51:51,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:51:51,384 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2022-03-19 07:51:51,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 82 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:51,396 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2022-03-19 07:51:51,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-19 07:51:51,397 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:51:51,397 INFO L500 BasicCegarLoop]: trace histogram [71, 41, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:51:51,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-19 07:51:51,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:51,604 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:51:51,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:51:51,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1733626146, now seen corresponding path program 139 times [2022-03-19 07:51:51,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:51,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [494895499] [2022-03-19 07:51:51,605 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:51:51,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1733626146, now seen corresponding path program 140 times [2022-03-19 07:51:51,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:51:51,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355494811] [2022-03-19 07:51:51,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:51:51,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:51:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:52,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:51:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:52,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:51:52,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355494811] [2022-03-19 07:51:52,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355494811] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:51:52,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871738919] [2022-03-19 07:51:52,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:51:52,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:52,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:51:52,924 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:51:52,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-19 07:51:52,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:51:52,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:51:52,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-19 07:51:52,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:51:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:53,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:51:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:53,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871738919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:51:53,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:51:53,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 104 [2022-03-19 07:51:53,951 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:53,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [494895499] [2022-03-19 07:51:53,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [494895499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:53,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:53,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-19 07:51:53,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175827077] [2022-03-19 07:51:53,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:53,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-19 07:51:53,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:53,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-19 07:51:53,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:51:53,953 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand has 84 states, 84 states have (on average 1.9761904761904763) internal successors, (166), 83 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:56,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:51:56,098 INFO L93 Difference]: Finished difference Result 176 states and 177 transitions. [2022-03-19 07:51:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-19 07:51:56,098 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9761904761904763) internal successors, (166), 83 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-03-19 07:51:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:51:56,099 INFO L225 Difference]: With dead ends: 176 [2022-03-19 07:51:56,099 INFO L226 Difference]: Without dead ends: 173 [2022-03-19 07:51:56,101 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3616 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=13599, Invalid=20441, Unknown=0, NotChecked=0, Total=34040 [2022-03-19 07:51:56,101 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 184 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:51:56,101 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 36 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:51:56,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-19 07:51:56,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-03-19 07:51:56,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:56,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2022-03-19 07:51:56,113 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 169 [2022-03-19 07:51:56,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:51:56,113 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2022-03-19 07:51:56,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.9761904761904763) internal successors, (166), 83 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:51:56,113 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2022-03-19 07:51:56,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-19 07:51:56,114 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:51:56,114 INFO L500 BasicCegarLoop]: trace histogram [72, 41, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:51:56,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-19 07:51:56,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:56,327 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:51:56,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:51:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash 425046360, now seen corresponding path program 141 times [2022-03-19 07:51:56,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:56,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [240605893] [2022-03-19 07:51:56,328 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:51:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash 425046360, now seen corresponding path program 142 times [2022-03-19 07:51:56,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:51:56,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472622508] [2022-03-19 07:51:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:51:56,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:51:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:57,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:51:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:51:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:57,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:51:57,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472622508] [2022-03-19 07:51:57,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472622508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:51:57,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087262131] [2022-03-19 07:51:57,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:51:57,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:51:57,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:51:57,796 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:51:57,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-19 07:51:57,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:51:57,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:51:57,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-19 07:51:57,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:51:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:58,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:51:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:51:58,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087262131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:51:58,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:51:58,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 104 [2022-03-19 07:51:58,763 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:51:58,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [240605893] [2022-03-19 07:51:58,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [240605893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:51:58,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:51:58,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-19 07:51:58,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489837305] [2022-03-19 07:51:58,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:51:58,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-19 07:51:58,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:51:58,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-19 07:51:58,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:51:58,765 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 85 states, 85 states have (on average 1.9764705882352942) internal successors, (168), 84 states have internal predecessors, (168), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:01,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:52:01,659 INFO L93 Difference]: Finished difference Result 178 states and 179 transitions. [2022-03-19 07:52:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-19 07:52:01,660 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.9764705882352942) internal successors, (168), 84 states have internal predecessors, (168), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-03-19 07:52:01,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:52:01,660 INFO L225 Difference]: With dead ends: 178 [2022-03-19 07:52:01,660 INFO L226 Difference]: Without dead ends: 175 [2022-03-19 07:52:01,662 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 324 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3698 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=13702, Invalid=20708, Unknown=0, NotChecked=0, Total=34410 [2022-03-19 07:52:01,663 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 217 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:52:01,663 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 36 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:52:01,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-19 07:52:01,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-03-19 07:52:01,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2022-03-19 07:52:01,676 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2022-03-19 07:52:01,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:52:01,677 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2022-03-19 07:52:01,677 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.9764705882352942) internal successors, (168), 84 states have internal predecessors, (168), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2022-03-19 07:52:01,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-19 07:52:01,682 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:52:01,682 INFO L500 BasicCegarLoop]: trace histogram [73, 41, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:52:01,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-19 07:52:01,901 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-19 07:52:01,901 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:52:01,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:52:01,901 INFO L85 PathProgramCache]: Analyzing trace with hash 440120658, now seen corresponding path program 143 times [2022-03-19 07:52:01,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:01,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1373740732] [2022-03-19 07:52:01,902 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:52:01,902 INFO L85 PathProgramCache]: Analyzing trace with hash 440120658, now seen corresponding path program 144 times [2022-03-19 07:52:01,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:52:01,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31552956] [2022-03-19 07:52:01,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:52:01,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:52:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:03,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:52:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:03,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:52:03,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31552956] [2022-03-19 07:52:03,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31552956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:52:03,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383438051] [2022-03-19 07:52:03,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:52:03,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:52:03,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:52:03,370 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:52:03,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-19 07:52:03,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2022-03-19 07:52:03,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:52:03,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 07:52:03,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:52:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2701 proven. 1296 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2022-03-19 07:52:03,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:52:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2701 proven. 1296 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2022-03-19 07:52:04,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383438051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:52:04,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:52:04,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 39, 39] total 103 [2022-03-19 07:52:04,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:52:04,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1373740732] [2022-03-19 07:52:04,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1373740732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:04,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:04,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-19 07:52:04,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769944414] [2022-03-19 07:52:04,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:52:04,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-19 07:52:04,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:04,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-19 07:52:04,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 07:52:04,605 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 86 states, 86 states have (on average 1.9767441860465116) internal successors, (170), 85 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:06,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:52:06,731 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2022-03-19 07:52:06,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-19 07:52:06,732 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9767441860465116) internal successors, (170), 85 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-03-19 07:52:06,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:52:06,732 INFO L225 Difference]: With dead ends: 180 [2022-03-19 07:52:06,732 INFO L226 Difference]: Without dead ends: 177 [2022-03-19 07:52:06,734 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 329 SyntacticMatches, 2 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3530 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=13702, Invalid=20708, Unknown=0, NotChecked=0, Total=34410 [2022-03-19 07:52:06,735 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 190 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:52:06,735 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 41 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:52:06,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-19 07:52:06,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-03-19 07:52:06,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2022-03-19 07:52:06,747 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 173 [2022-03-19 07:52:06,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:52:06,747 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2022-03-19 07:52:06,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9767441860465116) internal successors, (170), 85 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2022-03-19 07:52:06,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-19 07:52:06,748 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:52:06,748 INFO L500 BasicCegarLoop]: trace histogram [74, 41, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:52:06,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-19 07:52:06,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-19 07:52:06,965 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:52:06,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:52:06,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2041619148, now seen corresponding path program 145 times [2022-03-19 07:52:06,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:06,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [928231912] [2022-03-19 07:52:06,966 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:52:06,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2041619148, now seen corresponding path program 146 times [2022-03-19 07:52:06,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:52:06,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828684640] [2022-03-19 07:52:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:52:06,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:52:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:08,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:52:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:08,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:52:08,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828684640] [2022-03-19 07:52:08,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828684640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:52:08,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888948649] [2022-03-19 07:52:08,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:52:08,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:52:08,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:52:08,612 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:52:08,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-19 07:52:08,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:52:08,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:52:08,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-19 07:52:08,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:52:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:08,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:52:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:09,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888948649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:52:09,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:52:09,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 104 [2022-03-19 07:52:09,865 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:52:09,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [928231912] [2022-03-19 07:52:09,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [928231912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:09,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:09,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-19 07:52:09,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393553163] [2022-03-19 07:52:09,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:52:09,865 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-19 07:52:09,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:09,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-19 07:52:09,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:52:09,866 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 87 states, 87 states have (on average 1.9770114942528736) internal successors, (172), 86 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:11,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:52:11,855 INFO L93 Difference]: Finished difference Result 182 states and 183 transitions. [2022-03-19 07:52:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-19 07:52:11,855 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9770114942528736) internal successors, (172), 86 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-03-19 07:52:11,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:52:11,855 INFO L225 Difference]: With dead ends: 182 [2022-03-19 07:52:11,855 INFO L226 Difference]: Without dead ends: 179 [2022-03-19 07:52:11,857 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 334 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3865 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=13908, Invalid=21248, Unknown=0, NotChecked=0, Total=35156 [2022-03-19 07:52:11,858 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 202 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:52:11,858 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 31 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:52:11,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-19 07:52:11,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-03-19 07:52:11,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2022-03-19 07:52:11,870 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 175 [2022-03-19 07:52:11,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:52:11,870 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2022-03-19 07:52:11,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9770114942528736) internal successors, (172), 86 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:11,870 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2022-03-19 07:52:11,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-19 07:52:11,871 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:52:11,871 INFO L500 BasicCegarLoop]: trace histogram [75, 41, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:52:11,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-19 07:52:12,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:52:12,088 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:52:12,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:52:12,088 INFO L85 PathProgramCache]: Analyzing trace with hash -811591226, now seen corresponding path program 147 times [2022-03-19 07:52:12,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:12,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1850494732] [2022-03-19 07:52:12,088 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:52:12,088 INFO L85 PathProgramCache]: Analyzing trace with hash -811591226, now seen corresponding path program 148 times [2022-03-19 07:52:12,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:52:12,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058757022] [2022-03-19 07:52:12,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:52:12,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:52:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:13,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:52:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:13,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:52:13,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058757022] [2022-03-19 07:52:13,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058757022] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:52:13,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401327323] [2022-03-19 07:52:13,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:52:13,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:52:13,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:52:13,405 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:52:13,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-19 07:52:13,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:52:13,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:52:13,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-19 07:52:13,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:52:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:13,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:52:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:14,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401327323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:52:14,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:52:14,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 104 [2022-03-19 07:52:14,503 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:52:14,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1850494732] [2022-03-19 07:52:14,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1850494732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:14,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:14,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-19 07:52:14,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451722729] [2022-03-19 07:52:14,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:52:14,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-19 07:52:14,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:14,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-19 07:52:14,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:52:14,505 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand has 88 states, 88 states have (on average 1.9772727272727273) internal successors, (174), 87 states have internal predecessors, (174), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:17,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:52:17,129 INFO L93 Difference]: Finished difference Result 184 states and 185 transitions. [2022-03-19 07:52:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-19 07:52:17,129 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9772727272727273) internal successors, (174), 87 states have internal predecessors, (174), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-03-19 07:52:17,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:52:17,130 INFO L225 Difference]: With dead ends: 184 [2022-03-19 07:52:17,130 INFO L226 Difference]: Without dead ends: 181 [2022-03-19 07:52:17,132 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=14011, Invalid=21521, Unknown=0, NotChecked=0, Total=35532 [2022-03-19 07:52:17,133 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 203 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:52:17,133 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 26 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:52:17,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-19 07:52:17,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2022-03-19 07:52:17,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2022-03-19 07:52:17,153 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 177 [2022-03-19 07:52:17,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:52:17,154 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2022-03-19 07:52:17,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.9772727272727273) internal successors, (174), 87 states have internal predecessors, (174), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:17,154 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2022-03-19 07:52:17,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-19 07:52:17,154 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:52:17,154 INFO L500 BasicCegarLoop]: trace histogram [76, 41, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:52:17,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-19 07:52:17,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:52:17,367 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:52:17,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:52:17,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1737341504, now seen corresponding path program 149 times [2022-03-19 07:52:17,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:17,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [430209669] [2022-03-19 07:52:17,368 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:52:17,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1737341504, now seen corresponding path program 150 times [2022-03-19 07:52:17,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:52:17,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527736711] [2022-03-19 07:52:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:52:17,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:52:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:19,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:52:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:19,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:52:19,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527736711] [2022-03-19 07:52:19,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527736711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:52:19,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331307774] [2022-03-19 07:52:19,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:52:19,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:52:19,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:52:19,365 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:52:19,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-19 07:52:19,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2022-03-19 07:52:19,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:52:19,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 07:52:19,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:52:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2926 proven. 1444 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-03-19 07:52:19,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:52:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2926 proven. 1444 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-03-19 07:52:20,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331307774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:52:20,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:52:20,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 41, 41] total 103 [2022-03-19 07:52:20,555 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:52:20,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [430209669] [2022-03-19 07:52:20,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [430209669] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:20,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:20,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-19 07:52:20,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911159354] [2022-03-19 07:52:20,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:52:20,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-19 07:52:20,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:20,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-19 07:52:20,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 07:52:20,557 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 89 states, 89 states have (on average 1.9775280898876404) internal successors, (176), 88 states have internal predecessors, (176), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:22,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:52:22,664 INFO L93 Difference]: Finished difference Result 186 states and 187 transitions. [2022-03-19 07:52:22,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-19 07:52:22,665 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.9775280898876404) internal successors, (176), 88 states have internal predecessors, (176), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-03-19 07:52:22,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:52:22,665 INFO L225 Difference]: With dead ends: 186 [2022-03-19 07:52:22,665 INFO L226 Difference]: Without dead ends: 183 [2022-03-19 07:52:22,666 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 344 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3786 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=14011, Invalid=21521, Unknown=0, NotChecked=0, Total=35532 [2022-03-19 07:52:22,666 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 211 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:52:22,667 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 46 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:52:22,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-19 07:52:22,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-03-19 07:52:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:22,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2022-03-19 07:52:22,680 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 179 [2022-03-19 07:52:22,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:52:22,681 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2022-03-19 07:52:22,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.9775280898876404) internal successors, (176), 88 states have internal predecessors, (176), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:22,681 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2022-03-19 07:52:22,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-19 07:52:22,681 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:52:22,681 INFO L500 BasicCegarLoop]: trace histogram [77, 41, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:52:22,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-19 07:52:22,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-03-19 07:52:22,895 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:52:22,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:52:22,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1164630982, now seen corresponding path program 151 times [2022-03-19 07:52:22,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:22,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [581839254] [2022-03-19 07:52:22,896 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:52:22,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1164630982, now seen corresponding path program 152 times [2022-03-19 07:52:22,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:52:22,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474872577] [2022-03-19 07:52:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:52:22,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:52:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:24,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:52:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:24,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:52:24,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474872577] [2022-03-19 07:52:24,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474872577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:52:24,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399648549] [2022-03-19 07:52:24,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:52:24,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:52:24,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:52:24,497 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:52:24,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-19 07:52:24,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:52:24,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:52:24,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-19 07:52:24,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:52:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:24,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:52:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:25,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399648549] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:52:25,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:52:25,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89, 89] total 104 [2022-03-19 07:52:25,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:52:25,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [581839254] [2022-03-19 07:52:25,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [581839254] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:25,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:25,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-19 07:52:25,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459406630] [2022-03-19 07:52:25,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:52:25,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-19 07:52:25,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:25,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-19 07:52:25,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:52:25,517 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand has 90 states, 90 states have (on average 1.9777777777777779) internal successors, (178), 89 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:52:27,944 INFO L93 Difference]: Finished difference Result 188 states and 189 transitions. [2022-03-19 07:52:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-19 07:52:27,944 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.9777777777777779) internal successors, (178), 89 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-03-19 07:52:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:52:27,945 INFO L225 Difference]: With dead ends: 188 [2022-03-19 07:52:27,945 INFO L226 Difference]: Without dead ends: 185 [2022-03-19 07:52:27,946 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4123 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=14217, Invalid=22073, Unknown=0, NotChecked=0, Total=36290 [2022-03-19 07:52:27,946 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 221 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 520 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:52:27,946 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 31 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [520 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:52:27,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-19 07:52:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-03-19 07:52:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2022-03-19 07:52:27,960 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 181 [2022-03-19 07:52:27,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:52:27,961 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2022-03-19 07:52:27,961 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.9777777777777779) internal successors, (178), 89 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:27,961 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2022-03-19 07:52:27,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-19 07:52:27,961 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:52:27,961 INFO L500 BasicCegarLoop]: trace histogram [78, 41, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:52:27,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-19 07:52:28,176 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:52:28,176 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:52:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:52:28,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1768552372, now seen corresponding path program 153 times [2022-03-19 07:52:28,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:28,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [934640553] [2022-03-19 07:52:28,177 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:52:28,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1768552372, now seen corresponding path program 154 times [2022-03-19 07:52:28,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:52:28,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305474506] [2022-03-19 07:52:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:52:28,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:52:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:29,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:52:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:29,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:52:29,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305474506] [2022-03-19 07:52:29,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305474506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:52:29,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128692073] [2022-03-19 07:52:29,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:52:29,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:52:29,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:52:29,619 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:52:29,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-19 07:52:29,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:52:29,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:52:29,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-19 07:52:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:52:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:29,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:52:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:30,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128692073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:52:30,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:52:30,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 104 [2022-03-19 07:52:30,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:52:30,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [934640553] [2022-03-19 07:52:30,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [934640553] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:30,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:30,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-19 07:52:30,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448033498] [2022-03-19 07:52:30,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:52:30,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-19 07:52:30,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:30,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-19 07:52:30,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:52:30,604 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 91 states, 91 states have (on average 1.978021978021978) internal successors, (180), 90 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:32,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:52:32,739 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2022-03-19 07:52:32,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-19 07:52:32,740 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.978021978021978) internal successors, (180), 90 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-03-19 07:52:32,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:52:32,740 INFO L225 Difference]: With dead ends: 190 [2022-03-19 07:52:32,740 INFO L226 Difference]: Without dead ends: 187 [2022-03-19 07:52:32,742 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4211 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=14320, Invalid=22352, Unknown=0, NotChecked=0, Total=36672 [2022-03-19 07:52:32,742 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 205 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:52:32,742 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 26 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:52:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-19 07:52:32,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-03-19 07:52:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2022-03-19 07:52:32,757 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 183 [2022-03-19 07:52:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:52:32,758 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2022-03-19 07:52:32,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.978021978021978) internal successors, (180), 90 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:32,758 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2022-03-19 07:52:32,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-19 07:52:32,760 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:52:32,760 INFO L500 BasicCegarLoop]: trace histogram [79, 41, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:52:32,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-19 07:52:32,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:52:32,974 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:52:32,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:52:32,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1235757906, now seen corresponding path program 155 times [2022-03-19 07:52:32,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:32,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [732337159] [2022-03-19 07:52:32,975 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:52:32,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1235757906, now seen corresponding path program 156 times [2022-03-19 07:52:32,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:52:32,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490302734] [2022-03-19 07:52:32,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:52:32,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:52:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:34,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:52:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:34,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:52:34,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490302734] [2022-03-19 07:52:34,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490302734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:52:34,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38945910] [2022-03-19 07:52:34,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:52:34,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:52:34,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:52:34,414 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:52:34,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-19 07:52:34,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2022-03-19 07:52:34,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:52:34,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 07:52:34,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:52:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3160 proven. 1521 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2022-03-19 07:52:34,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:52:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3160 proven. 1521 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2022-03-19 07:52:35,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38945910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:52:35,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:52:35,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 42, 42] total 103 [2022-03-19 07:52:35,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:52:35,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [732337159] [2022-03-19 07:52:35,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [732337159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:35,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:35,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-19 07:52:35,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669470616] [2022-03-19 07:52:35,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:52:35,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-19 07:52:35,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:35,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-19 07:52:35,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 07:52:35,158 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand has 92 states, 92 states have (on average 1.9782608695652173) internal successors, (182), 91 states have internal predecessors, (182), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:37,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:52:37,699 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2022-03-19 07:52:37,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-19 07:52:37,700 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9782608695652173) internal successors, (182), 91 states have internal predecessors, (182), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-03-19 07:52:37,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:52:37,700 INFO L225 Difference]: With dead ends: 192 [2022-03-19 07:52:37,700 INFO L226 Difference]: Without dead ends: 189 [2022-03-19 07:52:37,702 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 359 SyntacticMatches, 2 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4052 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=14320, Invalid=22352, Unknown=0, NotChecked=0, Total=36672 [2022-03-19 07:52:37,702 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 212 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:52:37,702 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 21 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:52:37,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-19 07:52:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2022-03-19 07:52:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2022-03-19 07:52:37,718 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 185 [2022-03-19 07:52:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:52:37,718 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2022-03-19 07:52:37,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.9782608695652173) internal successors, (182), 91 states have internal predecessors, (182), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2022-03-19 07:52:37,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-19 07:52:37,719 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:52:37,719 INFO L500 BasicCegarLoop]: trace histogram [80, 41, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:52:37,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-19 07:52:37,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:52:37,920 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:52:37,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:52:37,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2135055144, now seen corresponding path program 157 times [2022-03-19 07:52:37,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:37,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [869618422] [2022-03-19 07:52:37,921 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:52:37,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2135055144, now seen corresponding path program 158 times [2022-03-19 07:52:37,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:52:37,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001164440] [2022-03-19 07:52:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:52:37,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:52:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:39,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:52:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:39,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:52:39,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001164440] [2022-03-19 07:52:39,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001164440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:52:39,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276900964] [2022-03-19 07:52:39,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:52:39,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:52:39,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:52:39,643 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:52:39,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-19 07:52:39,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:52:39,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:52:39,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-19 07:52:39,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:52:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:39,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:52:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:40,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276900964] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:52:40,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:52:40,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 92] total 104 [2022-03-19 07:52:40,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:52:40,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [869618422] [2022-03-19 07:52:40,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [869618422] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:40,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:40,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-19 07:52:40,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709347220] [2022-03-19 07:52:40,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:52:40,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-19 07:52:40,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:40,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-19 07:52:40,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:52:40,663 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand has 93 states, 93 states have (on average 1.978494623655914) internal successors, (184), 92 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:43,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:52:43,199 INFO L93 Difference]: Finished difference Result 194 states and 195 transitions. [2022-03-19 07:52:43,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-19 07:52:43,200 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.978494623655914) internal successors, (184), 92 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-03-19 07:52:43,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:52:43,200 INFO L225 Difference]: With dead ends: 194 [2022-03-19 07:52:43,200 INFO L226 Difference]: Without dead ends: 191 [2022-03-19 07:52:43,201 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 364 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4390 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=14526, Invalid=22916, Unknown=0, NotChecked=0, Total=37442 [2022-03-19 07:52:43,202 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 209 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:52:43,202 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 51 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:52:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-19 07:52:43,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-03-19 07:52:43,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 186 states have (on average 1.010752688172043) internal successors, (188), 186 states have internal predecessors, (188), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:43,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2022-03-19 07:52:43,217 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 187 [2022-03-19 07:52:43,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:52:43,217 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2022-03-19 07:52:43,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.978494623655914) internal successors, (184), 92 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:43,218 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2022-03-19 07:52:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-19 07:52:43,218 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:52:43,218 INFO L500 BasicCegarLoop]: trace histogram [81, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:52:43,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-19 07:52:43,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-03-19 07:52:43,435 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:52:43,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:52:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1213912286, now seen corresponding path program 159 times [2022-03-19 07:52:43,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:43,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [629370514] [2022-03-19 07:52:43,436 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:52:43,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1213912286, now seen corresponding path program 160 times [2022-03-19 07:52:43,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:52:43,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292104491] [2022-03-19 07:52:43,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:52:43,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:52:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:45,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:52:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:45,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:52:45,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292104491] [2022-03-19 07:52:45,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292104491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:52:45,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766586902] [2022-03-19 07:52:45,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:52:45,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:52:45,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:52:45,254 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:52:45,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-19 07:52:45,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:52:45,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:52:45,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-19 07:52:45,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:52:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:45,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:52:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:45,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766586902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:52:45,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:52:45,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 104 [2022-03-19 07:52:45,964 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:52:45,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [629370514] [2022-03-19 07:52:45,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [629370514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:45,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:45,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-19 07:52:45,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289509458] [2022-03-19 07:52:45,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:52:45,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-19 07:52:45,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:45,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-19 07:52:45,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:52:45,966 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand has 94 states, 94 states have (on average 1.9787234042553192) internal successors, (186), 93 states have internal predecessors, (186), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:48,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:52:48,242 INFO L93 Difference]: Finished difference Result 196 states and 197 transitions. [2022-03-19 07:52:48,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-19 07:52:48,243 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.9787234042553192) internal successors, (186), 93 states have internal predecessors, (186), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-03-19 07:52:48,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:52:48,243 INFO L225 Difference]: With dead ends: 196 [2022-03-19 07:52:48,243 INFO L226 Difference]: Without dead ends: 193 [2022-03-19 07:52:48,245 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 369 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4481 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=14629, Invalid=23201, Unknown=0, NotChecked=0, Total=37830 [2022-03-19 07:52:48,245 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 205 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:52:48,245 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 36 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:52:48,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-19 07:52:48,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-03-19 07:52:48,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2022-03-19 07:52:48,262 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2022-03-19 07:52:48,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:52:48,262 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2022-03-19 07:52:48,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.9787234042553192) internal successors, (186), 93 states have internal predecessors, (186), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:48,262 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2022-03-19 07:52:48,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-19 07:52:48,263 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:52:48,263 INFO L500 BasicCegarLoop]: trace histogram [82, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:52:48,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-19 07:52:48,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-19 07:52:48,464 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:52:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:52:48,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1653859484, now seen corresponding path program 161 times [2022-03-19 07:52:48,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:48,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2101854460] [2022-03-19 07:52:48,465 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:52:48,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1653859484, now seen corresponding path program 162 times [2022-03-19 07:52:48,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:52:48,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534626170] [2022-03-19 07:52:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:52:48,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:52:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:50,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:52:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:50,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:52:50,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534626170] [2022-03-19 07:52:50,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534626170] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:52:50,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650251475] [2022-03-19 07:52:50,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:52:50,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:52:50,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:52:50,817 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:52:50,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-19 07:52:50,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2022-03-19 07:52:50,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:52:50,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 07:52:50,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:52:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 3403 proven. 1681 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-19 07:52:51,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:52:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 3403 proven. 1681 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-19 07:52:51,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650251475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:52:51,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:52:51,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 44, 44] total 103 [2022-03-19 07:52:51,722 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:52:51,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2101854460] [2022-03-19 07:52:51,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2101854460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:51,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:51,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-19 07:52:51,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720993765] [2022-03-19 07:52:51,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:52:51,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-19 07:52:51,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:51,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-19 07:52:51,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 07:52:51,725 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 95 states, 95 states have (on average 1.9789473684210526) internal successors, (188), 94 states have internal predecessors, (188), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:54,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:52:54,668 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2022-03-19 07:52:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-19 07:52:54,668 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9789473684210526) internal successors, (188), 94 states have internal predecessors, (188), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-03-19 07:52:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:52:54,669 INFO L225 Difference]: With dead ends: 198 [2022-03-19 07:52:54,669 INFO L226 Difference]: Without dead ends: 195 [2022-03-19 07:52:54,671 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 374 SyntacticMatches, 2 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4326 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=14629, Invalid=23201, Unknown=0, NotChecked=0, Total=37830 [2022-03-19 07:52:54,671 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 243 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:52:54,671 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 56 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:52:54,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-19 07:52:54,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-03-19 07:52:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 190 states have (on average 1.0105263157894737) internal successors, (192), 190 states have internal predecessors, (192), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2022-03-19 07:52:54,689 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 191 [2022-03-19 07:52:54,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:52:54,689 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2022-03-19 07:52:54,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9789473684210526) internal successors, (188), 94 states have internal predecessors, (188), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:54,689 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2022-03-19 07:52:54,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-19 07:52:54,690 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:52:54,690 INFO L500 BasicCegarLoop]: trace histogram [83, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:52:54,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-19 07:52:54,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-19 07:52:54,906 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:52:54,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:52:54,907 INFO L85 PathProgramCache]: Analyzing trace with hash 213526422, now seen corresponding path program 163 times [2022-03-19 07:52:54,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:54,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [367786039] [2022-03-19 07:52:54,907 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:52:54,907 INFO L85 PathProgramCache]: Analyzing trace with hash 213526422, now seen corresponding path program 164 times [2022-03-19 07:52:54,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:52:54,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756073293] [2022-03-19 07:52:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:52:54,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:52:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:56,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:52:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:52:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:56,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:52:56,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756073293] [2022-03-19 07:52:56,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756073293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:52:56,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853160639] [2022-03-19 07:52:56,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:52:56,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:52:56,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:52:56,476 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:52:56,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-19 07:52:56,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:52:56,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:52:56,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-19 07:52:56,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:52:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:56,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:52:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:52:57,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853160639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:52:57,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:52:57,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 104 [2022-03-19 07:52:57,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:52:57,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [367786039] [2022-03-19 07:52:57,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [367786039] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:52:57,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:52:57,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-19 07:52:57,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262295624] [2022-03-19 07:52:57,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:52:57,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-19 07:52:57,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:52:57,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-19 07:52:57,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:52:57,169 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand has 96 states, 96 states have (on average 1.9791666666666667) internal successors, (190), 95 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:59,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:52:59,848 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2022-03-19 07:52:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-19 07:52:59,848 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9791666666666667) internal successors, (190), 95 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-03-19 07:52:59,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:52:59,849 INFO L225 Difference]: With dead ends: 200 [2022-03-19 07:52:59,849 INFO L226 Difference]: Without dead ends: 197 [2022-03-19 07:52:59,850 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4666 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=14835, Invalid=23777, Unknown=0, NotChecked=0, Total=38612 [2022-03-19 07:52:59,851 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 223 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:52:59,851 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 41 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:52:59,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-19 07:52:59,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-03-19 07:52:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2022-03-19 07:52:59,869 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 193 [2022-03-19 07:52:59,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:52:59,869 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2022-03-19 07:52:59,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.9791666666666667) internal successors, (190), 95 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:52:59,869 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2022-03-19 07:52:59,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-19 07:52:59,870 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:52:59,870 INFO L500 BasicCegarLoop]: trace histogram [84, 43, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:52:59,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-19 07:53:00,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-19 07:53:00,070 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:53:00,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:53:00,071 INFO L85 PathProgramCache]: Analyzing trace with hash -967076848, now seen corresponding path program 165 times [2022-03-19 07:53:00,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:00,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1161058609] [2022-03-19 07:53:00,071 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:53:00,071 INFO L85 PathProgramCache]: Analyzing trace with hash -967076848, now seen corresponding path program 166 times [2022-03-19 07:53:00,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:53:00,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50683813] [2022-03-19 07:53:00,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:53:00,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:53:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:02,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:53:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:02,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:53:02,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50683813] [2022-03-19 07:53:02,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50683813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:53:02,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796950196] [2022-03-19 07:53:02,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:53:02,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:53:02,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:53:02,165 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:53:02,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-19 07:53:02,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:53:02,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:53:02,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-19 07:53:02,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:53:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:02,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:53:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:03,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796950196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:53:03,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:53:03,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 104 [2022-03-19 07:53:03,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:53:03,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1161058609] [2022-03-19 07:53:03,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1161058609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:53:03,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:53:03,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-19 07:53:03,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728032395] [2022-03-19 07:53:03,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:53:03,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-19 07:53:03,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:03,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-19 07:53:03,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:53:03,091 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 97 states, 97 states have (on average 1.9793814432989691) internal successors, (192), 96 states have internal predecessors, (192), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:05,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:53:05,614 INFO L93 Difference]: Finished difference Result 202 states and 203 transitions. [2022-03-19 07:53:05,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-19 07:53:05,614 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.9793814432989691) internal successors, (192), 96 states have internal predecessors, (192), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-03-19 07:53:05,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:53:05,615 INFO L225 Difference]: With dead ends: 202 [2022-03-19 07:53:05,615 INFO L226 Difference]: Without dead ends: 199 [2022-03-19 07:53:05,617 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 384 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4760 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=14938, Invalid=24068, Unknown=0, NotChecked=0, Total=39006 [2022-03-19 07:53:05,618 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 240 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:53:05,618 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 36 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:53:05,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-19 07:53:05,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2022-03-19 07:53:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:05,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2022-03-19 07:53:05,638 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2022-03-19 07:53:05,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:53:05,638 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2022-03-19 07:53:05,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.9793814432989691) internal successors, (192), 96 states have internal predecessors, (192), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:05,638 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2022-03-19 07:53:05,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-19 07:53:05,639 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:53:05,639 INFO L500 BasicCegarLoop]: trace histogram [85, 44, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:53:05,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-19 07:53:05,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:53:05,851 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:53:05,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:53:05,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1655453174, now seen corresponding path program 167 times [2022-03-19 07:53:05,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:05,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1037751567] [2022-03-19 07:53:05,852 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:53:05,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1655453174, now seen corresponding path program 168 times [2022-03-19 07:53:05,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:53:05,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352229736] [2022-03-19 07:53:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:53:05,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:53:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:07,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:53:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:07,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:53:07,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352229736] [2022-03-19 07:53:07,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352229736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:53:07,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413649845] [2022-03-19 07:53:07,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:53:07,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:53:07,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:53:07,876 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:53:07,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-19 07:53:07,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2022-03-19 07:53:07,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:53:07,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 07:53:08,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:53:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3649 proven. 1936 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-19 07:53:08,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:53:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3649 proven. 1936 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-19 07:53:08,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413649845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:53:08,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:53:08,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 47, 47] total 103 [2022-03-19 07:53:08,621 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:53:08,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1037751567] [2022-03-19 07:53:08,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1037751567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:53:08,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:53:08,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-19 07:53:08,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594962216] [2022-03-19 07:53:08,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:53:08,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-19 07:53:08,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:08,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-19 07:53:08,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 07:53:08,622 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand has 98 states, 98 states have (on average 1.9795918367346939) internal successors, (194), 97 states have internal predecessors, (194), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:11,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:53:11,159 INFO L93 Difference]: Finished difference Result 204 states and 205 transitions. [2022-03-19 07:53:11,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-19 07:53:11,159 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.9795918367346939) internal successors, (194), 97 states have internal predecessors, (194), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-03-19 07:53:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:53:11,159 INFO L225 Difference]: With dead ends: 204 [2022-03-19 07:53:11,160 INFO L226 Difference]: Without dead ends: 201 [2022-03-19 07:53:11,161 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 389 SyntacticMatches, 2 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4608 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=14938, Invalid=24068, Unknown=0, NotChecked=0, Total=39006 [2022-03-19 07:53:11,161 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 248 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:53:11,161 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 36 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:53:11,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-19 07:53:11,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-03-19 07:53:11,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:11,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2022-03-19 07:53:11,180 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 197 [2022-03-19 07:53:11,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:53:11,180 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2022-03-19 07:53:11,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.9795918367346939) internal successors, (194), 97 states have internal predecessors, (194), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:11,180 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2022-03-19 07:53:11,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-19 07:53:11,181 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:53:11,181 INFO L500 BasicCegarLoop]: trace histogram [86, 45, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:53:11,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-19 07:53:11,397 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:53:11,398 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:53:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:53:11,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1760138876, now seen corresponding path program 169 times [2022-03-19 07:53:11,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:11,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [974164914] [2022-03-19 07:53:11,399 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:53:11,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1760138876, now seen corresponding path program 170 times [2022-03-19 07:53:11,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:53:11,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574117119] [2022-03-19 07:53:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:53:11,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:53:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:13,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:53:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:13,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:53:13,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574117119] [2022-03-19 07:53:13,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574117119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:53:13,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734194323] [2022-03-19 07:53:13,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:53:13,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:53:13,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:53:13,048 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:53:13,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-19 07:53:13,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:53:13,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:53:13,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-19 07:53:13,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:53:13,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:13,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:53:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:13,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734194323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:53:13,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:53:13,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 104 [2022-03-19 07:53:13,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:53:13,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [974164914] [2022-03-19 07:53:13,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [974164914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:53:13,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:53:13,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-19 07:53:13,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157148864] [2022-03-19 07:53:13,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:53:13,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-19 07:53:13,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:13,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-19 07:53:13,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:53:13,640 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand has 99 states, 99 states have (on average 1.97979797979798) internal successors, (196), 98 states have internal predecessors, (196), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:17,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:53:17,174 INFO L93 Difference]: Finished difference Result 206 states and 207 transitions. [2022-03-19 07:53:17,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-19 07:53:17,174 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.97979797979798) internal successors, (196), 98 states have internal predecessors, (196), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-03-19 07:53:17,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:53:17,175 INFO L225 Difference]: With dead ends: 206 [2022-03-19 07:53:17,175 INFO L226 Difference]: Without dead ends: 203 [2022-03-19 07:53:17,176 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 394 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=15144, Invalid=24656, Unknown=0, NotChecked=0, Total=39800 [2022-03-19 07:53:17,177 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 237 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:53:17,177 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 36 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:53:17,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-19 07:53:17,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-03-19 07:53:17,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 198 states have (on average 1.0101010101010102) internal successors, (200), 198 states have internal predecessors, (200), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2022-03-19 07:53:17,217 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 199 [2022-03-19 07:53:17,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:53:17,217 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2022-03-19 07:53:17,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.97979797979798) internal successors, (196), 98 states have internal predecessors, (196), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:17,217 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2022-03-19 07:53:17,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-19 07:53:17,218 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:53:17,218 INFO L500 BasicCegarLoop]: trace histogram [87, 46, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:53:17,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-19 07:53:17,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:53:17,435 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:53:17,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:53:17,436 INFO L85 PathProgramCache]: Analyzing trace with hash 716116606, now seen corresponding path program 171 times [2022-03-19 07:53:17,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:17,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2087487235] [2022-03-19 07:53:17,436 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:53:17,436 INFO L85 PathProgramCache]: Analyzing trace with hash 716116606, now seen corresponding path program 172 times [2022-03-19 07:53:17,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:53:17,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3690961] [2022-03-19 07:53:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:53:17,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:53:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:19,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:53:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:19,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:53:19,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3690961] [2022-03-19 07:53:19,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3690961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:53:19,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66760517] [2022-03-19 07:53:19,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:53:19,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:53:19,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:53:19,182 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:53:19,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-19 07:53:19,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:53:19,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:53:19,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-19 07:53:19,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:53:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:19,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:53:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:19,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66760517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:53:19,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:53:19,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 104 [2022-03-19 07:53:19,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:53:19,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2087487235] [2022-03-19 07:53:19,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2087487235] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:53:19,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:53:19,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-19 07:53:19,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451527435] [2022-03-19 07:53:19,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:53:19,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-19 07:53:19,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:19,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-19 07:53:19,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:53:19,784 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand has 100 states, 100 states have (on average 1.98) internal successors, (198), 99 states have internal predecessors, (198), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:22,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:53:22,333 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2022-03-19 07:53:22,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-19 07:53:22,334 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 99 states have internal predecessors, (198), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-03-19 07:53:22,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:53:22,334 INFO L225 Difference]: With dead ends: 208 [2022-03-19 07:53:22,334 INFO L226 Difference]: Without dead ends: 205 [2022-03-19 07:53:22,336 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 399 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5048 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=15247, Invalid=24953, Unknown=0, NotChecked=0, Total=40200 [2022-03-19 07:53:22,336 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 238 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:53:22,337 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 21 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:53:22,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-19 07:53:22,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2022-03-19 07:53:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2022-03-19 07:53:22,357 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2022-03-19 07:53:22,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:53:22,357 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2022-03-19 07:53:22,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 99 states have internal predecessors, (198), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:22,358 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2022-03-19 07:53:22,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-19 07:53:22,358 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:53:22,358 INFO L500 BasicCegarLoop]: trace histogram [88, 47, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:53:22,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-19 07:53:22,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:53:22,571 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:53:22,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:53:22,572 INFO L85 PathProgramCache]: Analyzing trace with hash 985752824, now seen corresponding path program 173 times [2022-03-19 07:53:22,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:22,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [192867377] [2022-03-19 07:53:22,572 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:53:22,572 INFO L85 PathProgramCache]: Analyzing trace with hash 985752824, now seen corresponding path program 174 times [2022-03-19 07:53:22,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:53:22,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330273620] [2022-03-19 07:53:22,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:53:22,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:53:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:24,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:53:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:24,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:53:24,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330273620] [2022-03-19 07:53:24,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330273620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:53:24,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515904415] [2022-03-19 07:53:24,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:53:24,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:53:24,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:53:24,377 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:53:24,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-19 07:53:24,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 88 check-sat command(s) [2022-03-19 07:53:24,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:53:24,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-19 07:53:24,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:53:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 3895 proven. 2209 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-19 07:53:24,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:53:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 3895 proven. 2209 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-19 07:53:24,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515904415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:53:24,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:53:24,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 50, 50] total 103 [2022-03-19 07:53:24,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:53:24,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [192867377] [2022-03-19 07:53:24,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [192867377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:53:24,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:53:24,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-19 07:53:24,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422942951] [2022-03-19 07:53:24,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:53:24,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-19 07:53:24,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:24,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-19 07:53:24,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 07:53:24,924 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand has 101 states, 101 states have (on average 1.9801980198019802) internal successors, (200), 100 states have internal predecessors, (200), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:27,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:53:27,556 INFO L93 Difference]: Finished difference Result 210 states and 211 transitions. [2022-03-19 07:53:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-19 07:53:27,557 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.9801980198019802) internal successors, (200), 100 states have internal predecessors, (200), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-03-19 07:53:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:53:27,557 INFO L225 Difference]: With dead ends: 210 [2022-03-19 07:53:27,557 INFO L226 Difference]: Without dead ends: 207 [2022-03-19 07:53:27,559 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 404 SyntacticMatches, 2 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=15247, Invalid=24953, Unknown=0, NotChecked=0, Total=40200 [2022-03-19 07:53:27,560 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 234 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:53:27,560 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 36 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:53:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-19 07:53:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2022-03-19 07:53:27,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 202 states have (on average 1.00990099009901) internal successors, (204), 202 states have internal predecessors, (204), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2022-03-19 07:53:27,581 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 203 [2022-03-19 07:53:27,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:53:27,581 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2022-03-19 07:53:27,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.9801980198019802) internal successors, (200), 100 states have internal predecessors, (200), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:27,581 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2022-03-19 07:53:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-19 07:53:27,595 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:53:27,596 INFO L500 BasicCegarLoop]: trace histogram [89, 48, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:53:27,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-19 07:53:27,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:53:27,799 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:53:27,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:53:27,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1886846734, now seen corresponding path program 175 times [2022-03-19 07:53:27,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:27,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1885197511] [2022-03-19 07:53:27,800 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:53:27,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1886846734, now seen corresponding path program 176 times [2022-03-19 07:53:27,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:53:27,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804163621] [2022-03-19 07:53:27,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:53:27,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:53:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:29,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:53:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:29,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:53:29,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804163621] [2022-03-19 07:53:29,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804163621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:53:29,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671730771] [2022-03-19 07:53:29,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:53:29,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:53:29,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:53:30,000 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:53:30,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-19 07:53:30,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:53:30,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:53:30,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-19 07:53:30,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:53:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:30,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:53:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:30,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671730771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:53:30,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:53:30,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 104 [2022-03-19 07:53:30,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:53:30,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1885197511] [2022-03-19 07:53:30,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1885197511] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:53:30,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:53:30,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-19 07:53:30,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413950696] [2022-03-19 07:53:30,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:53:30,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-19 07:53:30,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:30,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-19 07:53:30,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:53:30,547 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand has 102 states, 102 states have (on average 1.9803921568627452) internal successors, (202), 101 states have internal predecessors, (202), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:33,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:53:33,980 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2022-03-19 07:53:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-19 07:53:33,980 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.9803921568627452) internal successors, (202), 101 states have internal predecessors, (202), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-03-19 07:53:33,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:53:33,981 INFO L225 Difference]: With dead ends: 212 [2022-03-19 07:53:33,981 INFO L226 Difference]: Without dead ends: 209 [2022-03-19 07:53:33,983 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 409 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5245 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-03-19 07:53:33,983 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 229 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:53:33,983 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 41 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:53:33,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-19 07:53:34,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-03-19 07:53:34,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:34,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2022-03-19 07:53:34,006 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 205 [2022-03-19 07:53:34,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:53:34,006 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2022-03-19 07:53:34,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.9803921568627452) internal successors, (202), 101 states have internal predecessors, (202), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:34,006 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2022-03-19 07:53:34,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-03-19 07:53:34,007 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:53:34,007 INFO L500 BasicCegarLoop]: trace histogram [90, 49, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:53:34,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-19 07:53:34,224 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-19 07:53:34,224 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:53:34,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:53:34,224 INFO L85 PathProgramCache]: Analyzing trace with hash -791050644, now seen corresponding path program 177 times [2022-03-19 07:53:34,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:34,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [696588461] [2022-03-19 07:53:34,225 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:53:34,225 INFO L85 PathProgramCache]: Analyzing trace with hash -791050644, now seen corresponding path program 178 times [2022-03-19 07:53:34,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:53:34,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134221083] [2022-03-19 07:53:34,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:53:34,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:53:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:36,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:53:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:36,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:53:36,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134221083] [2022-03-19 07:53:36,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134221083] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:53:36,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305948164] [2022-03-19 07:53:36,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:53:36,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:53:36,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:53:36,244 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:53:36,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-19 07:53:36,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:53:36,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:53:36,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-19 07:53:36,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:53:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:36,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:53:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:53:36,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305948164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:53:36,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:53:36,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 104 [2022-03-19 07:53:36,722 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:53:36,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [696588461] [2022-03-19 07:53:36,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [696588461] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:53:36,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:53:36,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-19 07:53:36,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259124042] [2022-03-19 07:53:36,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:53:36,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-19 07:53:36,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:36,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-19 07:53:36,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 07:53:36,724 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand has 103 states, 103 states have (on average 1.9805825242718447) internal successors, (204), 102 states have internal predecessors, (204), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:39,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:53:39,508 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2022-03-19 07:53:39,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-19 07:53:39,508 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.9805825242718447) internal successors, (204), 102 states have internal predecessors, (204), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-03-19 07:53:39,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:53:39,509 INFO L225 Difference]: With dead ends: 213 [2022-03-19 07:53:39,509 INFO L226 Difference]: Without dead ends: 210 [2022-03-19 07:53:39,511 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 414 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5345 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=15556, Invalid=25856, Unknown=0, NotChecked=0, Total=41412 [2022-03-19 07:53:39,511 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 251 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:53:39,511 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 31 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:53:39,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-19 07:53:39,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-03-19 07:53:39,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 206 states have (on average 1.0097087378640777) internal successors, (208), 206 states have internal predecessors, (208), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:39,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2022-03-19 07:53:39,533 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 207 [2022-03-19 07:53:39,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:53:39,533 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2022-03-19 07:53:39,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.9805825242718447) internal successors, (204), 102 states have internal predecessors, (204), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:39,533 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2022-03-19 07:53:39,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-03-19 07:53:39,534 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:53:39,534 INFO L500 BasicCegarLoop]: trace histogram [91, 50, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:53:39,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-19 07:53:39,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-19 07:53:39,744 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:53:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:53:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2004326, now seen corresponding path program 179 times [2022-03-19 07:53:39,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:39,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [975218584] [2022-03-19 07:53:39,745 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:53:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2004326, now seen corresponding path program 180 times [2022-03-19 07:53:39,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:53:39,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29797703] [2022-03-19 07:53:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:53:39,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:53:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:40,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:53:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-19 07:53:40,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:53:40,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29797703] [2022-03-19 07:53:40,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29797703] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:53:40,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91821148] [2022-03-19 07:53:40,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:53:40,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:53:40,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:53:40,882 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:53:40,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-19 07:53:41,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2022-03-19 07:53:41,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:53:41,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-19 07:53:41,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:53:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-19 07:53:41,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:53:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-19 07:53:42,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91821148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:53:42,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:53:42,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 56 [2022-03-19 07:53:42,547 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:53:42,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [975218584] [2022-03-19 07:53:42,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [975218584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:53:42,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:53:42,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-19 07:53:42,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21426050] [2022-03-19 07:53:42,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:53:42,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 07:53:42,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:42,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 07:53:42,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 07:53:42,548 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand has 55 states, 55 states have (on average 2.272727272727273) internal successors, (125), 54 states have internal predecessors, (125), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:45,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:53:45,015 INFO L93 Difference]: Finished difference Result 216 states and 217 transitions. [2022-03-19 07:53:45,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-19 07:53:45,016 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.272727272727273) internal successors, (125), 54 states have internal predecessors, (125), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-03-19 07:53:45,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:53:45,016 INFO L225 Difference]: With dead ends: 216 [2022-03-19 07:53:45,016 INFO L226 Difference]: Without dead ends: 213 [2022-03-19 07:53:45,017 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 414 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=320, Invalid=11236, Unknown=0, NotChecked=0, Total=11556 [2022-03-19 07:53:45,017 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 79 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 6432 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 6484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 6432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:53:45,017 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 340 Invalid, 6484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 6432 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 07:53:45,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-19 07:53:45,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2022-03-19 07:53:45,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2022-03-19 07:53:45,043 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 209 [2022-03-19 07:53:45,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:53:45,043 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2022-03-19 07:53:45,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.272727272727273) internal successors, (125), 54 states have internal predecessors, (125), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:45,043 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2022-03-19 07:53:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-19 07:53:45,044 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:53:45,044 INFO L500 BasicCegarLoop]: trace histogram [92, 51, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:53:45,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-19 07:53:45,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:53:45,255 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:53:45,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:53:45,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1918619104, now seen corresponding path program 181 times [2022-03-19 07:53:45,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:45,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1560501821] [2022-03-19 07:53:45,256 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:53:45,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1918619104, now seen corresponding path program 182 times [2022-03-19 07:53:45,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:53:45,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446637134] [2022-03-19 07:53:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:53:45,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:53:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:45,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:53:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:53:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 6742 proven. 0 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-19 07:53:45,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:53:45,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446637134] [2022-03-19 07:53:45,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446637134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:53:45,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:53:45,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-19 07:53:45,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:53:45,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1560501821] [2022-03-19 07:53:45,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1560501821] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:53:45,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:53:45,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-19 07:53:45,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367511199] [2022-03-19 07:53:45,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:53:45,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 07:53:45,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:53:45,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 07:53:45,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 07:53:45,856 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 52 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:46,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:53:46,485 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2022-03-19 07:53:46,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-19 07:53:46,485 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 52 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-03-19 07:53:46,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:53:46,485 INFO L225 Difference]: With dead ends: 212 [2022-03-19 07:53:46,485 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 07:53:46,486 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 07:53:46,487 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:53:46,487 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 44 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:53:46,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 07:53:46,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 07:53:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-19 07:53:46,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 07:53:46,487 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 211 [2022-03-19 07:53:46,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:53:46,487 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 07:53:46,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 52 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:53:46,487 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 07:53:46,487 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 07:53:46,489 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 07:53:46,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-03-19 07:53:46,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.