/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-simple/nested_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 21:03:17,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 21:03:17,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 21:03:17,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 21:03:17,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 21:03:17,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 21:03:17,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 21:03:17,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 21:03:17,424 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 21:03:17,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 21:03:17,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 21:03:17,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 21:03:17,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 21:03:17,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 21:03:17,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 21:03:17,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 21:03:17,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 21:03:17,426 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 21:03:17,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 21:03:17,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 21:03:17,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 21:03:17,426 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 21:03:17,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 21:03:17,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:03:17,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 21:03:17,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 21:03:17,427 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 21:03:17,427 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 21:03:17,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 21:03:17,427 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 21:03:17,427 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 21:03:17,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 21:03:17,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 21:03:17,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 21:03:17,599 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 21:03:17,599 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 21:03:17,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_4.c [2022-04-06 21:03:17,654 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0b7b836e/6afe7136e809404a9bf9b319af60ed11/FLAG302c160bf [2022-04-06 21:03:17,984 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 21:03:17,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_4.c [2022-04-06 21:03:17,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0b7b836e/6afe7136e809404a9bf9b319af60ed11/FLAG302c160bf [2022-04-06 21:03:18,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0b7b836e/6afe7136e809404a9bf9b319af60ed11 [2022-04-06 21:03:18,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 21:03:18,436 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 21:03:18,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 21:03:18,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 21:03:18,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 21:03:18,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:03:18" (1/1) ... [2022-04-06 21:03:18,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@701e0ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:18, skipping insertion in model container [2022-04-06 21:03:18,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:03:18" (1/1) ... [2022-04-06 21:03:18,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 21:03:18,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 21:03:18,553 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-simple/nested_4.c[841,854] [2022-04-06 21:03:18,555 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:03:18,575 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 21:03:18,584 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-simple/nested_4.c[841,854] [2022-04-06 21:03:18,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:03:18,595 INFO L208 MainTranslator]: Completed translation [2022-04-06 21:03:18,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:18 WrapperNode [2022-04-06 21:03:18,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 21:03:18,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 21:03:18,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 21:03:18,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 21:03:18,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:18" (1/1) ... [2022-04-06 21:03:18,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:18" (1/1) ... [2022-04-06 21:03:18,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:18" (1/1) ... [2022-04-06 21:03:18,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:18" (1/1) ... [2022-04-06 21:03:18,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:18" (1/1) ... [2022-04-06 21:03:18,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:18" (1/1) ... [2022-04-06 21:03:18,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:18" (1/1) ... [2022-04-06 21:03:18,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 21:03:18,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 21:03:18,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 21:03:18,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 21:03:18,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:18" (1/1) ... [2022-04-06 21:03:18,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:03:18,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:18,637 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) [2022-04-06 21:03:18,647 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 [2022-04-06 21:03:18,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 21:03:18,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 21:03:18,677 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 21:03:18,678 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 21:03:18,678 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 21:03:18,678 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 21:03:18,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 21:03:18,678 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 21:03:18,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 21:03:18,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 21:03:18,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 21:03:18,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 21:03:18,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 21:03:18,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 21:03:18,721 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 21:03:18,722 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 21:03:18,812 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 21:03:18,816 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 21:03:18,816 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-04-06 21:03:18,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:03:18 BoogieIcfgContainer [2022-04-06 21:03:18,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 21:03:18,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 21:03:18,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 21:03:18,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 21:03:18,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:03:18" (1/3) ... [2022-04-06 21:03:18,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2735498a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:03:18, skipping insertion in model container [2022-04-06 21:03:18,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:18" (2/3) ... [2022-04-06 21:03:18,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2735498a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:03:18, skipping insertion in model container [2022-04-06 21:03:18,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:03:18" (3/3) ... [2022-04-06 21:03:18,830 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_4.c [2022-04-06 21:03:18,833 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 21:03:18,833 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 21:03:18,880 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 21:03:18,893 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 [2022-04-06 21:03:18,893 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 21:03:18,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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) [2022-04-06 21:03:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-04-06 21:03:18,920 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:18,921 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:18,921 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:18,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:18,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1467912619, now seen corresponding path program 1 times [2022-04-06 21:03:18,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:18,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [828085603] [2022-04-06 21:03:18,949 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:03:18,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1467912619, now seen corresponding path program 2 times [2022-04-06 21:03:18,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:18,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883770844] [2022-04-06 21:03:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:18,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:19,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:19,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:19,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883770844] [2022-04-06 21:03:19,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883770844] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:19,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:19,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:03:19,102 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:19,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [828085603] [2022-04-06 21:03:19,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [828085603] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:19,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:19,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:03:19,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350904491] [2022-04-06 21:03:19,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:19,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 21:03:19,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:19,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 21:03:19,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:03:19,126 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:19,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:19,144 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2022-04-06 21:03:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 21:03:19,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 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 9 [2022-04-06 21:03:19,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:19,150 INFO L225 Difference]: With dead ends: 38 [2022-04-06 21:03:19,150 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 21:03:19,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:03:19,154 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:19,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:19,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 21:03:19,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 21:03:19,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-04-06 21:03:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-04-06 21:03:19,174 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2022-04-06 21:03:19,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:19,174 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-04-06 21:03:19,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:19,175 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-04-06 21:03:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-04-06 21:03:19,175 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:19,175 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:19,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 21:03:19,176 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1467952981, now seen corresponding path program 1 times [2022-04-06 21:03:19,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:19,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [883338055] [2022-04-06 21:03:19,177 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:03:19,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1467952981, now seen corresponding path program 2 times [2022-04-06 21:03:19,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:19,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121397948] [2022-04-06 21:03:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:19,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:19,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:19,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:19,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121397948] [2022-04-06 21:03:19,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121397948] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:19,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:19,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:19,216 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:19,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [883338055] [2022-04-06 21:03:19,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [883338055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:19,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:19,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:19,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859472544] [2022-04-06 21:03:19,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:19,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:03:19,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:19,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:03:19,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:03:19,218 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:19,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:19,257 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-04-06 21:03:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:03:19,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 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 9 [2022-04-06 21:03:19,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:19,258 INFO L225 Difference]: With dead ends: 28 [2022-04-06 21:03:19,258 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 21:03:19,259 INFO L912 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 [2022-04-06 21:03:19,260 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:19,260 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 25 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:19,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 21:03:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2022-04-06 21:03:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:19,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-04-06 21:03:19,265 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 9 [2022-04-06 21:03:19,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:19,265 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-04-06 21:03:19,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:19,266 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-04-06 21:03:19,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 21:03:19,266 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:19,266 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:19,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 21:03:19,266 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:19,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:19,267 INFO L85 PathProgramCache]: Analyzing trace with hash -408278750, now seen corresponding path program 1 times [2022-04-06 21:03:19,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:19,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1213678694] [2022-04-06 21:03:19,277 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:19,277 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:19,277 INFO L85 PathProgramCache]: Analyzing trace with hash -408278750, now seen corresponding path program 2 times [2022-04-06 21:03:19,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:19,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389453111] [2022-04-06 21:03:19,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:19,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:19,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:19,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:19,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389453111] [2022-04-06 21:03:19,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389453111] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:19,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:19,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:19,328 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:19,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1213678694] [2022-04-06 21:03:19,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1213678694] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:19,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:19,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:19,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52363923] [2022-04-06 21:03:19,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:19,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:03:19,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:19,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:03:19,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:03:19,329 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:19,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:19,367 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-04-06 21:03:19,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:03:19,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 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 12 [2022-04-06 21:03:19,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:19,369 INFO L225 Difference]: With dead ends: 35 [2022-04-06 21:03:19,369 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 21:03:19,369 INFO L912 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 [2022-04-06 21:03:19,370 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:19,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 25 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:19,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 21:03:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2022-04-06 21:03:19,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2022-04-06 21:03:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-04-06 21:03:19,375 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2022-04-06 21:03:19,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:19,375 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-04-06 21:03:19,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:19,375 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-04-06 21:03:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 21:03:19,376 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:19,376 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:19,376 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 21:03:19,376 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:19,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:19,376 INFO L85 PathProgramCache]: Analyzing trace with hash 675904015, now seen corresponding path program 1 times [2022-04-06 21:03:19,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:19,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1550934918] [2022-04-06 21:03:19,386 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:19,393 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:19,393 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:19,393 INFO L85 PathProgramCache]: Analyzing trace with hash 675904015, now seen corresponding path program 2 times [2022-04-06 21:03:19,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:19,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251858392] [2022-04-06 21:03:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:19,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:19,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:19,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:19,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251858392] [2022-04-06 21:03:19,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251858392] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:19,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:19,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:19,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:19,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1550934918] [2022-04-06 21:03:19,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1550934918] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:19,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:19,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:19,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970703946] [2022-04-06 21:03:19,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:19,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:03:19,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:19,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:03:19,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:03:19,447 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:19,478 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-04-06 21:03:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:03:19,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 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 15 [2022-04-06 21:03:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:19,478 INFO L225 Difference]: With dead ends: 35 [2022-04-06 21:03:19,479 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 21:03:19,479 INFO L912 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 [2022-04-06 21:03:19,480 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:19,480 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 25 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 21:03:19,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-04-06 21:03:19,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2022-04-06 21:03:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-04-06 21:03:19,484 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2022-04-06 21:03:19,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:19,484 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-04-06 21:03:19,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:19,484 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-04-06 21:03:19,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 21:03:19,484 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:19,485 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:19,485 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 21:03:19,485 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:19,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:19,485 INFO L85 PathProgramCache]: Analyzing trace with hash 919301982, now seen corresponding path program 1 times [2022-04-06 21:03:19,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:19,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1836798805] [2022-04-06 21:03:19,498 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:19,499 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:19,499 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:19,501 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:19,501 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:19,501 INFO L85 PathProgramCache]: Analyzing trace with hash 919301982, now seen corresponding path program 2 times [2022-04-06 21:03:19,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:19,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383595586] [2022-04-06 21:03:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:19,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:19,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:19,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:19,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383595586] [2022-04-06 21:03:19,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383595586] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:19,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:19,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:19,544 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:19,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1836798805] [2022-04-06 21:03:19,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1836798805] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:19,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:19,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:19,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212266117] [2022-04-06 21:03:19,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:19,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:03:19,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:19,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:03:19,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:03:19,545 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:19,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:19,572 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-04-06 21:03:19,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:03:19,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 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 18 [2022-04-06 21:03:19,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:19,573 INFO L225 Difference]: With dead ends: 35 [2022-04-06 21:03:19,573 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 21:03:19,573 INFO L912 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 [2022-04-06 21:03:19,574 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:19,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 25 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:19,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 21:03:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-04-06 21:03:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2022-04-06 21:03:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-04-06 21:03:19,578 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2022-04-06 21:03:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:19,578 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-04-06 21:03:19,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:19,578 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-04-06 21:03:19,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 21:03:19,578 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:19,578 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:19,578 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 21:03:19,579 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:19,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1380235844, now seen corresponding path program 1 times [2022-04-06 21:03:19,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:19,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [783837789] [2022-04-06 21:03:19,602 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:19,603 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:19,603 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:19,611 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:19,611 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:19,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1380235844, now seen corresponding path program 2 times [2022-04-06 21:03:19,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:19,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122233055] [2022-04-06 21:03:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:19,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:19,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:19,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:19,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122233055] [2022-04-06 21:03:19,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122233055] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:19,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833538729] [2022-04-06 21:03:19,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:19,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:19,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:19,660 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) [2022-04-06 21:03:19,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 21:03:19,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:19,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:19,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 21:03:19,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 21:03:19,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 21:03:19,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833538729] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:19,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:19,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-04-06 21:03:19,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:19,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [783837789] [2022-04-06 21:03:19,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [783837789] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:19,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:19,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:03:19,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375539864] [2022-04-06 21:03:19,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:19,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:03:19,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:19,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:03:19,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:03:19,879 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:19,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:19,928 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-04-06 21:03:19,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:03:19,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 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 20 [2022-04-06 21:03:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:19,930 INFO L225 Difference]: With dead ends: 38 [2022-04-06 21:03:19,930 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 21:03:19,931 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:03:19,933 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:19,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:19,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 21:03:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-04-06 21:03:19,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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) [2022-04-06 21:03:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-04-06 21:03:19,942 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 20 [2022-04-06 21:03:19,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:19,942 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-04-06 21:03:19,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:19,942 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-04-06 21:03:19,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 21:03:19,943 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:19,943 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:19,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 21:03:20,165 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-04-06 21:03:20,165 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:20,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:20,166 INFO L85 PathProgramCache]: Analyzing trace with hash 672070810, now seen corresponding path program 3 times [2022-04-06 21:03:20,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:20,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2140239876] [2022-04-06 21:03:20,203 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:20,204 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:20,204 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:20,205 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:20,206 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:20,206 INFO L85 PathProgramCache]: Analyzing trace with hash 672070810, now seen corresponding path program 4 times [2022-04-06 21:03:20,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:20,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893012486] [2022-04-06 21:03:20,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:20,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:20,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:03:20,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:20,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893012486] [2022-04-06 21:03:20,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893012486] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:20,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57846045] [2022-04-06 21:03:20,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:20,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:20,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:20,234 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) [2022-04-06 21:03:20,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 21:03:20,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:20,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:20,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:03:20,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:20,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:20,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57846045] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:20,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:20,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-04-06 21:03:20,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:20,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2140239876] [2022-04-06 21:03:20,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2140239876] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:20,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:20,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:03:20,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905992318] [2022-04-06 21:03:20,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:20,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:03:20,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:20,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:03:20,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:03:20,383 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:20,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:20,419 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-04-06 21:03:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:03:20,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 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 22 [2022-04-06 21:03:20,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:20,419 INFO L225 Difference]: With dead ends: 52 [2022-04-06 21:03:20,419 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 21:03:20,420 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:03:20,420 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:20,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 21:03:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-04-06 21:03:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2022-04-06 21:03:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-04-06 21:03:20,429 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2022-04-06 21:03:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:20,429 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-04-06 21:03:20,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-04-06 21:03:20,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 21:03:20,429 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:20,429 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:20,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:20,643 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,SelfDestructingSolverStorable6 [2022-04-06 21:03:20,643 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:20,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:20,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1867081809, now seen corresponding path program 5 times [2022-04-06 21:03:20,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:20,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1619191839] [2022-04-06 21:03:20,714 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:20,714 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:20,714 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:20,716 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:20,716 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:20,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1867081809, now seen corresponding path program 6 times [2022-04-06 21:03:20,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:20,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112700351] [2022-04-06 21:03:20,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:20,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:20,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 21:03:20,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:20,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112700351] [2022-04-06 21:03:20,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112700351] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:20,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572526936] [2022-04-06 21:03:20,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:20,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:20,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:20,757 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) [2022-04-06 21:03:20,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 21:03:20,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:03:20,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:20,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 21:03:20,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 21:03:20,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 21:03:20,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572526936] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:20,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:20,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-04-06 21:03:20,872 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:20,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1619191839] [2022-04-06 21:03:20,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1619191839] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:20,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:20,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:03:20,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551179370] [2022-04-06 21:03:20,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:20,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:03:20,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:20,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:03:20,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:03:20,873 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:20,911 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2022-04-06 21:03:20,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:03:20,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 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 [2022-04-06 21:03:20,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:20,912 INFO L225 Difference]: With dead ends: 86 [2022-04-06 21:03:20,912 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 21:03:20,912 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:03:20,912 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:20,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 25 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 21:03:20,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 47. [2022-04-06 21:03:20,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 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) [2022-04-06 21:03:20,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-04-06 21:03:20,920 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 29 [2022-04-06 21:03:20,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:20,920 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-04-06 21:03:20,920 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:20,920 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-04-06 21:03:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 21:03:20,921 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:20,921 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:20,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 21:03:21,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:21,137 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:21,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:21,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1800571710, now seen corresponding path program 7 times [2022-04-06 21:03:21,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:21,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [461158512] [2022-04-06 21:03:21,287 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:21,288 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:21,291 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:21,291 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:21,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1800571710, now seen corresponding path program 8 times [2022-04-06 21:03:21,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:21,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416770133] [2022-04-06 21:03:21,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:21,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:21,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-04-06 21:03:21,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:21,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416770133] [2022-04-06 21:03:21,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416770133] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:21,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847709959] [2022-04-06 21:03:21,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:21,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:21,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:21,325 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) [2022-04-06 21:03:21,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 21:03:21,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:21,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:21,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:03:21,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 21:03:21,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 21:03:21,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847709959] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:21,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:21,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-04-06 21:03:21,482 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:21,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [461158512] [2022-04-06 21:03:21,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [461158512] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:21,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:21,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:03:21,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455428579] [2022-04-06 21:03:21,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:21,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:03:21,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:21,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:03:21,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:03:21,484 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:21,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:21,529 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2022-04-06 21:03:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:03:21,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 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 46 [2022-04-06 21:03:21,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:21,530 INFO L225 Difference]: With dead ends: 123 [2022-04-06 21:03:21,530 INFO L226 Difference]: Without dead ends: 120 [2022-04-06 21:03:21,530 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:03:21,530 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:21,531 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:21,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-06 21:03:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2022-04-06 21:03:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.1875) internal successors, (95), 80 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) [2022-04-06 21:03:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-04-06 21:03:21,544 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 46 [2022-04-06 21:03:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:21,544 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-04-06 21:03:21,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:21,544 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-04-06 21:03:21,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 21:03:21,545 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:21,545 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:21,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 21:03:21,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:21,761 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:21,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1094491381, now seen corresponding path program 9 times [2022-04-06 21:03:21,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:21,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2104203595] [2022-04-06 21:03:22,055 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:22,058 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:22,058 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:22,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1094491381, now seen corresponding path program 10 times [2022-04-06 21:03:22,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:22,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145851816] [2022-04-06 21:03:22,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:22,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:22,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 109 proven. 4 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-04-06 21:03:22,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:22,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145851816] [2022-04-06 21:03:22,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145851816] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:22,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394447634] [2022-04-06 21:03:22,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:22,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:22,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:22,124 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) [2022-04-06 21:03:22,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 21:03:22,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:22,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:22,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:03:22,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 109 proven. 4 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-04-06 21:03:22,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 109 proven. 4 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-04-06 21:03:22,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394447634] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:22,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:22,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 21:03:22,351 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:22,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2104203595] [2022-04-06 21:03:22,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2104203595] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:22,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:22,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:03:22,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66331808] [2022-04-06 21:03:22,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:22,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:03:22,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:22,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:03:22,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:03:22,356 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:22,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:22,401 INFO L93 Difference]: Finished difference Result 178 states and 213 transitions. [2022-04-06 21:03:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:03:22,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 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 [2022-04-06 21:03:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:22,402 INFO L225 Difference]: With dead ends: 178 [2022-04-06 21:03:22,402 INFO L226 Difference]: Without dead ends: 108 [2022-04-06 21:03:22,402 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:03:22,403 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:22,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-04-06 21:03:22,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-04-06 21:03:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 96 states have (on average 1.15625) internal successors, (111), 96 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) [2022-04-06 21:03:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2022-04-06 21:03:22,415 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 83 [2022-04-06 21:03:22,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:22,415 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2022-04-06 21:03:22,415 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2022-04-06 21:03:22,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 21:03:22,416 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:22,416 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:22,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:22,632 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,SelfDestructingSolverStorable9 [2022-04-06 21:03:22,632 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:22,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:22,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1810799115, now seen corresponding path program 11 times [2022-04-06 21:03:22,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:22,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1511576583] [2022-04-06 21:03:22,903 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:22,906 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:22,906 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:22,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1810799115, now seen corresponding path program 12 times [2022-04-06 21:03:22,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:22,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331325311] [2022-04-06 21:03:22,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:22,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:22,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2022-04-06 21:03:22,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:22,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331325311] [2022-04-06 21:03:22,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331325311] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:22,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798051653] [2022-04-06 21:03:22,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:22,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:22,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:22,965 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) [2022-04-06 21:03:22,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 21:03:22,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 21:03:22,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:23,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:03:23,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 482 proven. 9 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 21:03:23,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 482 proven. 9 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 21:03:23,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798051653] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:23,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:23,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-06 21:03:23,210 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:23,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1511576583] [2022-04-06 21:03:23,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1511576583] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:23,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:23,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:03:23,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580829290] [2022-04-06 21:03:23,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:23,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:03:23,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:23,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:03:23,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:03:23,211 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:23,276 INFO L93 Difference]: Finished difference Result 208 states and 243 transitions. [2022-04-06 21:03:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:03:23,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 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 [2022-04-06 21:03:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:23,277 INFO L225 Difference]: With dead ends: 208 [2022-04-06 21:03:23,277 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 21:03:23,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:03:23,277 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:23,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 30 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:23,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 21:03:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2022-04-06 21:03:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.1339285714285714) internal successors, (127), 112 states have internal predecessors, (127), 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) [2022-04-06 21:03:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2022-04-06 21:03:23,290 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 99 [2022-04-06 21:03:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:23,290 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2022-04-06 21:03:23,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2022-04-06 21:03:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 21:03:23,290 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:23,291 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:23,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:23,506 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:23,506 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:23,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:23,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1755066101, now seen corresponding path program 13 times [2022-04-06 21:03:23,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:23,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [131523281] [2022-04-06 21:03:23,782 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:23,787 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:23,787 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:23,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1755066101, now seen corresponding path program 14 times [2022-04-06 21:03:23,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:23,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865527619] [2022-04-06 21:03:23,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:23,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:23,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 16 refuted. 0 times theorem prover too weak. 1074 trivial. 0 not checked. [2022-04-06 21:03:23,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:23,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865527619] [2022-04-06 21:03:23,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865527619] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:23,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822415650] [2022-04-06 21:03:23,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:23,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:23,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:23,858 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) [2022-04-06 21:03:23,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 21:03:23,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:23,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:23,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 21:03:23,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 16 refuted. 0 times theorem prover too weak. 1074 trivial. 0 not checked. [2022-04-06 21:03:24,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 16 refuted. 0 times theorem prover too weak. 1074 trivial. 0 not checked. [2022-04-06 21:03:24,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822415650] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:24,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:24,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-06 21:03:24,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:24,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [131523281] [2022-04-06 21:03:24,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [131523281] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:24,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:24,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:03:24,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869708081] [2022-04-06 21:03:24,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:24,222 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:03:24,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:24,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:03:24,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:03:24,223 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:24,296 INFO L93 Difference]: Finished difference Result 238 states and 273 transitions. [2022-04-06 21:03:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:03:24,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (2), 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 [2022-04-06 21:03:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:24,297 INFO L225 Difference]: With dead ends: 238 [2022-04-06 21:03:24,297 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 21:03:24,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:03:24,298 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:24,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 40 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 21:03:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 132. [2022-04-06 21:03:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 128 states have (on average 1.1171875) internal successors, (143), 128 states have internal predecessors, (143), 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) [2022-04-06 21:03:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 146 transitions. [2022-04-06 21:03:24,310 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 146 transitions. Word has length 115 [2022-04-06 21:03:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:24,311 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 146 transitions. [2022-04-06 21:03:24,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 146 transitions. [2022-04-06 21:03:24,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 21:03:24,311 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:24,311 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:24,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 21:03:24,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:24,527 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:24,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:24,528 INFO L85 PathProgramCache]: Analyzing trace with hash 429066251, now seen corresponding path program 15 times [2022-04-06 21:03:24,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:24,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1165535067] [2022-04-06 21:03:24,803 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:24,809 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:24,809 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:24,809 INFO L85 PathProgramCache]: Analyzing trace with hash 429066251, now seen corresponding path program 16 times [2022-04-06 21:03:24,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:24,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498301296] [2022-04-06 21:03:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:24,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:24,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 445 proven. 25 refuted. 0 times theorem prover too weak. 1557 trivial. 0 not checked. [2022-04-06 21:03:24,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:24,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498301296] [2022-04-06 21:03:24,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498301296] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:24,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48978054] [2022-04-06 21:03:24,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:24,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:24,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:24,888 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) [2022-04-06 21:03:24,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 21:03:24,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:24,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:24,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:03:24,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 445 proven. 25 refuted. 0 times theorem prover too weak. 1557 trivial. 0 not checked. [2022-04-06 21:03:25,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 445 proven. 25 refuted. 0 times theorem prover too weak. 1557 trivial. 0 not checked. [2022-04-06 21:03:25,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48978054] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:25,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:25,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 10 [2022-04-06 21:03:25,284 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:25,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1165535067] [2022-04-06 21:03:25,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1165535067] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:25,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:25,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:03:25,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077393685] [2022-04-06 21:03:25,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:25,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:03:25,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:25,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:03:25,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:03:25,285 INFO L87 Difference]: Start difference. First operand 132 states and 146 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:25,362 INFO L93 Difference]: Finished difference Result 260 states and 295 transitions. [2022-04-06 21:03:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:03:25,362 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (2), 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 [2022-04-06 21:03:25,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:25,363 INFO L225 Difference]: With dead ends: 260 [2022-04-06 21:03:25,363 INFO L226 Difference]: Without dead ends: 148 [2022-04-06 21:03:25,363 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:03:25,364 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:25,364 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 30 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:25,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-04-06 21:03:25,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-04-06 21:03:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.1041666666666667) internal successors, (159), 144 states have internal predecessors, (159), 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) [2022-04-06 21:03:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 162 transitions. [2022-04-06 21:03:25,378 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 162 transitions. Word has length 131 [2022-04-06 21:03:25,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:25,378 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 162 transitions. [2022-04-06 21:03:25,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:25,378 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 162 transitions. [2022-04-06 21:03:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-06 21:03:25,379 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:25,379 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:25,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:25,595 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,SelfDestructingSolverStorable12 [2022-04-06 21:03:25,596 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:25,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:25,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2064892149, now seen corresponding path program 17 times [2022-04-06 21:03:25,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:25,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1381422743] [2022-04-06 21:03:25,882 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:25,887 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:25,887 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:25,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2064892149, now seen corresponding path program 18 times [2022-04-06 21:03:25,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:25,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675329416] [2022-04-06 21:03:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:25,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:25,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2022-04-06 21:03:25,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:25,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675329416] [2022-04-06 21:03:25,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675329416] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:25,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218077327] [2022-04-06 21:03:25,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:25,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:25,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:25,925 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) [2022-04-06 21:03:25,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 21:03:25,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-04-06 21:03:25,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:25,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:03:25,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1778 proven. 89 refuted. 0 times theorem prover too weak. 920 trivial. 0 not checked. [2022-04-06 21:03:26,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1778 proven. 89 refuted. 0 times theorem prover too weak. 920 trivial. 0 not checked. [2022-04-06 21:03:26,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218077327] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:26,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:26,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 21:03:26,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:26,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1381422743] [2022-04-06 21:03:26,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1381422743] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:26,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:26,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:03:26,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727988061] [2022-04-06 21:03:26,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:26,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:03:26,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:26,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:03:26,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:03:26,284 INFO L87 Difference]: Start difference. First operand 148 states and 162 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2022-04-06 21:03:26,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:26,350 INFO L93 Difference]: Finished difference Result 373 states and 410 transitions. [2022-04-06 21:03:26,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:03:26,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 147 [2022-04-06 21:03:26,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:26,352 INFO L225 Difference]: With dead ends: 373 [2022-04-06 21:03:26,352 INFO L226 Difference]: Without dead ends: 264 [2022-04-06 21:03:26,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:03:26,352 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:26,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 30 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:26,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-04-06 21:03:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 208. [2022-04-06 21:03:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 204 states have (on average 1.0931372549019607) internal successors, (223), 204 states have internal predecessors, (223), 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) [2022-04-06 21:03:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 226 transitions. [2022-04-06 21:03:26,371 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 226 transitions. Word has length 147 [2022-04-06 21:03:26,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:26,371 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 226 transitions. [2022-04-06 21:03:26,371 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2022-04-06 21:03:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 226 transitions. [2022-04-06 21:03:26,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-04-06 21:03:26,373 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:26,373 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:26,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:26,588 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,SelfDestructingSolverStorable13 [2022-04-06 21:03:26,588 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:26,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:26,589 INFO L85 PathProgramCache]: Analyzing trace with hash -509085365, now seen corresponding path program 19 times [2022-04-06 21:03:26,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:26,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2093100061] [2022-04-06 21:03:26,911 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:26,919 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:26,919 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:26,919 INFO L85 PathProgramCache]: Analyzing trace with hash -509085365, now seen corresponding path program 20 times [2022-04-06 21:03:26,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:26,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977596303] [2022-04-06 21:03:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:26,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:26,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2022-04-06 21:03:26,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:26,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977596303] [2022-04-06 21:03:26,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977596303] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:26,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071229422] [2022-04-06 21:03:26,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:26,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:26,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:26,984 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) [2022-04-06 21:03:26,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 21:03:27,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:27,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:27,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:03:27,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2022-04-06 21:03:27,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2022-04-06 21:03:27,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071229422] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:27,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:27,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-06 21:03:27,470 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:27,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2093100061] [2022-04-06 21:03:27,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2093100061] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:27,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:27,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:03:27,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64806012] [2022-04-06 21:03:27,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:27,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:03:27,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:27,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:03:27,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:03:27,471 INFO L87 Difference]: Start difference. First operand 208 states and 226 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:27,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:27,558 INFO L93 Difference]: Finished difference Result 478 states and 522 transitions. [2022-04-06 21:03:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:03:27,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (2), 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 [2022-04-06 21:03:27,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:27,560 INFO L225 Difference]: With dead ends: 478 [2022-04-06 21:03:27,560 INFO L226 Difference]: Without dead ends: 324 [2022-04-06 21:03:27,560 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 412 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:03:27,561 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:27,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 35 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:27,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-04-06 21:03:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 268. [2022-04-06 21:03:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 264 states have (on average 1.0871212121212122) internal successors, (287), 264 states have internal predecessors, (287), 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) [2022-04-06 21:03:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2022-04-06 21:03:27,584 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 207 [2022-04-06 21:03:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:27,585 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2022-04-06 21:03:27,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2022-04-06 21:03:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-04-06 21:03:27,586 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:27,586 INFO L499 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:27,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-06 21:03:27,791 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,SelfDestructingSolverStorable14 [2022-04-06 21:03:27,791 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:27,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:27,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1725424757, now seen corresponding path program 21 times [2022-04-06 21:03:27,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:27,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [766644425] [2022-04-06 21:03:28,116 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:28,126 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:28,126 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:28,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1725424757, now seen corresponding path program 22 times [2022-04-06 21:03:28,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:28,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800267597] [2022-04-06 21:03:28,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:28,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:28,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4210 proven. 526 refuted. 0 times theorem prover too weak. 6375 trivial. 0 not checked. [2022-04-06 21:03:28,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:28,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800267597] [2022-04-06 21:03:28,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800267597] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:28,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848185808] [2022-04-06 21:03:28,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:28,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:28,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:28,199 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) [2022-04-06 21:03:28,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 21:03:28,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:28,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:28,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 21:03:28,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4210 proven. 526 refuted. 0 times theorem prover too weak. 6375 trivial. 0 not checked. [2022-04-06 21:03:28,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4210 proven. 526 refuted. 0 times theorem prover too weak. 6375 trivial. 0 not checked. [2022-04-06 21:03:28,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848185808] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:28,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:28,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-06 21:03:28,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:28,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [766644425] [2022-04-06 21:03:28,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [766644425] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:28,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:28,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:03:28,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432591484] [2022-04-06 21:03:28,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:28,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:03:28,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:28,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:03:28,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:03:28,921 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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) [2022-04-06 21:03:29,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:29,019 INFO L93 Difference]: Finished difference Result 583 states and 634 transitions. [2022-04-06 21:03:29,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:03:29,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 267 [2022-04-06 21:03:29,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:29,021 INFO L225 Difference]: With dead ends: 583 [2022-04-06 21:03:29,021 INFO L226 Difference]: Without dead ends: 384 [2022-04-06 21:03:29,021 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 533 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:03:29,021 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:29,022 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 35 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:29,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-04-06 21:03:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 328. [2022-04-06 21:03:29,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 324 states have (on average 1.0833333333333333) internal successors, (351), 324 states have internal predecessors, (351), 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) [2022-04-06 21:03:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 354 transitions. [2022-04-06 21:03:29,052 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 354 transitions. Word has length 267 [2022-04-06 21:03:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:29,052 INFO L478 AbstractCegarLoop]: Abstraction has 328 states and 354 transitions. [2022-04-06 21:03:29,052 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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) [2022-04-06 21:03:29,052 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 354 transitions. [2022-04-06 21:03:29,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-04-06 21:03:29,054 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:29,054 INFO L499 BasicCegarLoop]: trace histogram [120, 120, 20, 20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:29,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:29,270 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 21:03:29,271 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:29,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:29,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1570784715, now seen corresponding path program 23 times [2022-04-06 21:03:29,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:29,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1216218081] [2022-04-06 21:03:29,569 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:29,584 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:29,584 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:29,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1570784715, now seen corresponding path program 24 times [2022-04-06 21:03:29,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:29,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983097953] [2022-04-06 21:03:29,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:29,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:29,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2022-04-06 21:03:29,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:29,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983097953] [2022-04-06 21:03:29,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983097953] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:29,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126653582] [2022-04-06 21:03:29,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:29,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:29,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:29,699 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) [2022-04-06 21:03:29,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 21:03:29,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 60 check-sat command(s) [2022-04-06 21:03:29,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:29,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:03:29,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 10943 proven. 875 refuted. 0 times theorem prover too weak. 5543 trivial. 0 not checked. [2022-04-06 21:03:30,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 10943 proven. 875 refuted. 0 times theorem prover too weak. 5543 trivial. 0 not checked. [2022-04-06 21:03:30,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126653582] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:30,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:30,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 10 [2022-04-06 21:03:30,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:30,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1216218081] [2022-04-06 21:03:30,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1216218081] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:30,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:30,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:03:30,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902873353] [2022-04-06 21:03:30,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:30,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:03:30,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:30,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:03:30,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:03:30,496 INFO L87 Difference]: Start difference. First operand 328 states and 354 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:30,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:30,597 INFO L93 Difference]: Finished difference Result 632 states and 686 transitions. [2022-04-06 21:03:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:03:30,597 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (2), 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 327 [2022-04-06 21:03:30,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:30,598 INFO L225 Difference]: With dead ends: 632 [2022-04-06 21:03:30,598 INFO L226 Difference]: Without dead ends: 388 [2022-04-06 21:03:30,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 654 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:03:30,599 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:30,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 35 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:30,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-04-06 21:03:30,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2022-04-06 21:03:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 384 states have (on average 1.0807291666666667) internal successors, (415), 384 states have internal predecessors, (415), 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) [2022-04-06 21:03:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 418 transitions. [2022-04-06 21:03:30,656 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 418 transitions. Word has length 327 [2022-04-06 21:03:30,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:30,656 INFO L478 AbstractCegarLoop]: Abstraction has 388 states and 418 transitions. [2022-04-06 21:03:30,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:30,656 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 418 transitions. [2022-04-06 21:03:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-04-06 21:03:30,659 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:30,659 INFO L499 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:30,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:30,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 21:03:30,875 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:30,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:30,875 INFO L85 PathProgramCache]: Analyzing trace with hash 340883467, now seen corresponding path program 25 times [2022-04-06 21:03:30,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:30,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [836324452] [2022-04-06 21:03:31,563 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:31,582 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:31,582 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:31,582 INFO L85 PathProgramCache]: Analyzing trace with hash 340883467, now seen corresponding path program 26 times [2022-04-06 21:03:31,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:31,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077353426] [2022-04-06 21:03:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:31,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:31,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2022-04-06 21:03:31,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:31,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077353426] [2022-04-06 21:03:31,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077353426] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:31,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308029799] [2022-04-06 21:03:31,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:31,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:31,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:31,679 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) [2022-04-06 21:03:31,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 21:03:31,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:31,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:31,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:03:31,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2022-04-06 21:03:32,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2022-04-06 21:03:32,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308029799] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:32,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:32,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 21:03:32,791 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:32,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [836324452] [2022-04-06 21:03:32,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [836324452] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:32,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:32,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:03:32,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511817844] [2022-04-06 21:03:32,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:32,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:03:32,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:32,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:03:32,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:03:32,793 INFO L87 Difference]: Start difference. First operand 388 states and 418 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:32,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:32,927 INFO L93 Difference]: Finished difference Result 952 states and 1027 transitions. [2022-04-06 21:03:32,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:03:32,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (2), 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 387 [2022-04-06 21:03:32,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:32,930 INFO L225 Difference]: With dead ends: 952 [2022-04-06 21:03:32,930 INFO L226 Difference]: Without dead ends: 758 [2022-04-06 21:03:32,930 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:03:32,931 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:32,931 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 35 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-04-06 21:03:32,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 574. [2022-04-06 21:03:32,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 570 states have (on average 1.0789473684210527) internal successors, (615), 570 states have internal predecessors, (615), 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) [2022-04-06 21:03:32,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 618 transitions. [2022-04-06 21:03:32,993 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 618 transitions. Word has length 387 [2022-04-06 21:03:32,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:32,993 INFO L478 AbstractCegarLoop]: Abstraction has 574 states and 618 transitions. [2022-04-06 21:03:32,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 618 transitions. [2022-04-06 21:03:32,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2022-04-06 21:03:32,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:32,998 INFO L499 BasicCegarLoop]: trace histogram [216, 216, 36, 36, 36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:33,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:33,214 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,SelfDestructingSolverStorable17 [2022-04-06 21:03:33,214 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:33,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:33,214 INFO L85 PathProgramCache]: Analyzing trace with hash -516898317, now seen corresponding path program 27 times [2022-04-06 21:03:33,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:33,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1269910743] [2022-04-06 21:03:33,955 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:34,013 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:34,013 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:34,013 INFO L85 PathProgramCache]: Analyzing trace with hash -516898317, now seen corresponding path program 28 times [2022-04-06 21:03:34,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:34,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764204866] [2022-04-06 21:03:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:34,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:34,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 28332 proven. 9444 refuted. 0 times theorem prover too weak. 18608 trivial. 0 not checked. [2022-04-06 21:03:34,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:34,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764204866] [2022-04-06 21:03:34,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764204866] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:34,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633059373] [2022-04-06 21:03:34,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:34,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:34,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:34,138 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) [2022-04-06 21:03:34,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 21:03:34,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:34,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:34,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:03:34,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 28332 proven. 9444 refuted. 0 times theorem prover too weak. 18608 trivial. 0 not checked. [2022-04-06 21:03:34,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 28332 proven. 9444 refuted. 0 times theorem prover too weak. 18608 trivial. 0 not checked. [2022-04-06 21:03:35,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633059373] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:35,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:35,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-06 21:03:35,247 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:35,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1269910743] [2022-04-06 21:03:35,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1269910743] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:35,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:35,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:03:35,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678433718] [2022-04-06 21:03:35,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:35,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:03:35,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:35,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:03:35,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:03:35,248 INFO L87 Difference]: Start difference. First operand 574 states and 618 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:35,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:35,409 INFO L93 Difference]: Finished difference Result 1231 states and 1327 transitions. [2022-04-06 21:03:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:03:35,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (2), 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 573 [2022-04-06 21:03:35,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:35,412 INFO L225 Difference]: With dead ends: 1231 [2022-04-06 21:03:35,412 INFO L226 Difference]: Without dead ends: 944 [2022-04-06 21:03:35,413 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1157 GetRequests, 1144 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:03:35,413 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:35,413 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 35 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:35,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-04-06 21:03:35,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 760. [2022-04-06 21:03:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 756 states have (on average 1.0780423280423281) internal successors, (815), 756 states have internal predecessors, (815), 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) [2022-04-06 21:03:35,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 818 transitions. [2022-04-06 21:03:35,509 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 818 transitions. Word has length 573 [2022-04-06 21:03:35,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:35,509 INFO L478 AbstractCegarLoop]: Abstraction has 760 states and 818 transitions. [2022-04-06 21:03:35,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:35,509 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 818 transitions. [2022-04-06 21:03:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2022-04-06 21:03:35,512 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:35,513 INFO L499 BasicCegarLoop]: trace histogram [288, 288, 48, 48, 48, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:35,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:35,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:35,727 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:35,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:35,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2092787403, now seen corresponding path program 29 times [2022-04-06 21:03:35,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:35,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [654835705] [2022-04-06 21:03:36,496 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:36,591 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:36,591 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:36,592 INFO L85 PathProgramCache]: Analyzing trace with hash 2092787403, now seen corresponding path program 30 times [2022-04-06 21:03:36,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:36,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097022584] [2022-04-06 21:03:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:36,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:36,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 100353 backedges. 50363 proven. 18886 refuted. 0 times theorem prover too weak. 31104 trivial. 0 not checked. [2022-04-06 21:03:36,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:36,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097022584] [2022-04-06 21:03:36,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097022584] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:36,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131725241] [2022-04-06 21:03:36,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:36,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:36,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:36,784 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) [2022-04-06 21:03:36,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 21:03:37,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 164 check-sat command(s) [2022-04-06 21:03:37,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:37,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 21:03:37,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 100353 backedges. 60253 proven. 0 refuted. 0 times theorem prover too weak. 40100 trivial. 0 not checked. [2022-04-06 21:03:38,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:03:38,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131725241] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:38,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:03:38,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [8] total 20 [2022-04-06 21:03:38,364 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:38,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [654835705] [2022-04-06 21:03:38,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [654835705] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:38,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:38,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:03:38,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915053880] [2022-04-06 21:03:38,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:38,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:03:38,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:38,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:03:38,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-04-06 21:03:38,366 INFO L87 Difference]: Start difference. First operand 760 states and 818 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:38,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:38,534 INFO L93 Difference]: Finished difference Result 760 states and 818 transitions. [2022-04-06 21:03:38,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 21:03:38,534 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (2), 1 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 759 [2022-04-06 21:03:38,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:38,536 INFO L225 Difference]: With dead ends: 760 [2022-04-06 21:03:38,536 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 21:03:38,539 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 749 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-04-06 21:03:38,539 INFO L913 BasicCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:38,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:38,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 21:03:38,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 21:03:38,543 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) [2022-04-06 21:03:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 21:03:38,543 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 759 [2022-04-06 21:03:38,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:38,544 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 21:03:38,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:38,544 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 21:03:38,544 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 21:03:38,546 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 21:03:38,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:38,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:38,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 21:04:07,287 WARN L232 SmtUtils]: Spent 28.04s on a formula simplification. DAG size of input: 1206 DAG size of output: 1206 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 21:06:56,334 WARN L232 SmtUtils]: Spent 2.79m on a formula simplification. DAG size of input: 1105 DAG size of output: 1105 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 21:07:03,872 WARN L232 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 1013 DAG size of output: 12 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 21:07:09,384 WARN L232 SmtUtils]: Spent 5.25s on a formula simplification. DAG size of input: 916 DAG size of output: 12 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 21:07:09,388 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 13) no Hoare annotation was computed. [2022-04-06 21:07:09,388 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 13) no Hoare annotation was computed. [2022-04-06 21:07:09,388 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 13) no Hoare annotation was computed. [2022-04-06 21:07:09,388 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 21:07:09,388 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 21:07:09,389 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 21:07:09,401 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 21:07:09,401 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 21:07:09,401 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 21:07:09,401 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 21:07:09,401 INFO L885 garLoopResultBuilder]: At program point L31-1(lines 31 33) the Hoare annotation is: true [2022-04-06 21:07:09,401 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 15 35) the Hoare annotation is: true [2022-04-06 21:07:09,401 INFO L878 garLoopResultBuilder]: At program point L23-2(lines 23 29) the Hoare annotation is: (and (not (< main_~d~0 6)) (< main_~b~0 6) (not (< main_~c~0 6)) (< main_~c~0 7) (< main_~d~0 7) (< main_~a~0 6)) [2022-04-06 21:07:09,401 INFO L878 garLoopResultBuilder]: At program point L23-3(lines 23 29) the Hoare annotation is: (and (not (< main_~d~0 6)) (< main_~b~0 7) (not (< main_~c~0 6)) (< main_~c~0 7) (< main_~d~0 7) (< main_~a~0 6)) [2022-04-06 21:07:09,401 INFO L878 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: false [2022-04-06 21:07:09,401 INFO L878 garLoopResultBuilder]: At program point L24-2(lines 24 28) the Hoare annotation is: (and (not (< main_~d~0 6)) (<= main_~c~0 5) (< main_~b~0 6) (< main_~d~0 7) (< main_~a~0 6)) [2022-04-06 21:07:09,401 INFO L878 garLoopResultBuilder]: At program point L24-3(lines 24 28) the Hoare annotation is: (and (not (< main_~d~0 6)) (< main_~b~0 6) (< main_~c~0 7) (< main_~d~0 7) (< main_~a~0 6)) [2022-04-06 21:07:09,401 INFO L878 garLoopResultBuilder]: At program point L25-2(lines 25 27) the Hoare annotation is: (and (<= main_~c~0 5) (< main_~b~0 6) (< main_~a~0 6) (<= main_~d~0 5)) [2022-04-06 21:07:09,402 INFO L878 garLoopResultBuilder]: At program point L25-3(lines 25 27) the Hoare annotation is: (and (<= main_~c~0 5) (< main_~b~0 6) (< main_~d~0 7) (< main_~a~0 6)) [2022-04-06 21:07:09,402 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 15 35) the Hoare annotation is: true [2022-04-06 21:07:09,402 INFO L878 garLoopResultBuilder]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 32) the Hoare annotation is: false [2022-04-06 21:07:09,402 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 15 35) the Hoare annotation is: true [2022-04-06 21:07:09,402 INFO L878 garLoopResultBuilder]: At program point L22-2(lines 22 30) the Hoare annotation is: (and (not (< main_~d~0 6)) (< main_~b~0 7) (not (< main_~c~0 6)) (< main_~c~0 7) (< main_~d~0 7) (< main_~a~0 6) (not (< main_~b~0 6))) [2022-04-06 21:07:09,402 INFO L878 garLoopResultBuilder]: At program point L22-3(lines 22 30) the Hoare annotation is: (and (< main_~a~0 7) (not (< main_~d~0 6)) (< main_~b~0 7) (not (< main_~c~0 6)) (< main_~c~0 7) (< main_~d~0 7) (not (< main_~b~0 6))) [2022-04-06 21:07:09,402 INFO L878 garLoopResultBuilder]: At program point L22-4(lines 15 35) the Hoare annotation is: (and (< main_~a~0 7) (not (< main_~d~0 6)) (< main_~b~0 7) (not (< main_~c~0 6)) (< main_~c~0 7) (< main_~d~0 7) (not (< main_~b~0 6)) (not (< main_~a~0 6))) [2022-04-06 21:07:09,404 INFO L719 BasicCegarLoop]: Path program histogram: [30, 2, 2, 2, 2, 2] [2022-04-06 21:07:09,405 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 21:07:09,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:07:09 BoogieIcfgContainer [2022-04-06 21:07:09,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 21:07:09,439 INFO L158 Benchmark]: Toolchain (without parser) took 231003.27ms. Allocated memory was 182.5MB in the beginning and 733.0MB in the end (delta: 550.5MB). Free memory was 127.3MB in the beginning and 493.5MB in the end (delta: -366.2MB). Peak memory consumption was 421.0MB. Max. memory is 8.0GB. [2022-04-06 21:07:09,439 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 182.5MB. Free memory is still 143.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 21:07:09,439 INFO L158 Benchmark]: CACSL2BoogieTranslator took 155.03ms. Allocated memory was 182.5MB in the beginning and 244.3MB in the end (delta: 61.9MB). Free memory was 127.1MB in the beginning and 216.8MB in the end (delta: -89.7MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. [2022-04-06 21:07:09,440 INFO L158 Benchmark]: Boogie Preprocessor took 16.16ms. Allocated memory is still 244.3MB. Free memory was 216.8MB in the beginning and 215.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 21:07:09,440 INFO L158 Benchmark]: RCFGBuilder took 205.09ms. Allocated memory is still 244.3MB. Free memory was 215.3MB in the beginning and 205.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 21:07:09,440 INFO L158 Benchmark]: TraceAbstraction took 230617.35ms. Allocated memory was 244.3MB in the beginning and 733.0MB in the end (delta: 488.6MB). Free memory was 204.8MB in the beginning and 493.5MB in the end (delta: -288.7MB). Peak memory consumption was 438.6MB. Max. memory is 8.0GB. [2022-04-06 21:07:09,441 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 182.5MB. Free memory is still 143.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 155.03ms. Allocated memory was 182.5MB in the beginning and 244.3MB in the end (delta: 61.9MB). Free memory was 127.1MB in the beginning and 216.8MB in the end (delta: -89.7MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.16ms. Allocated memory is still 244.3MB. Free memory was 216.8MB in the beginning and 215.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 205.09ms. Allocated memory is still 244.3MB. Free memory was 215.3MB in the beginning and 205.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 230617.35ms. Allocated memory was 244.3MB in the beginning and 733.0MB in the end (delta: 488.6MB). Free memory was 204.8MB in the beginning and 493.5MB in the end (delta: -288.7MB). Peak memory consumption was 438.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 32]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 230.5s, OverallIterations: 20, TraceHistogramMax: 288, PathProgramHistogramMax: 30, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 210.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 702 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 702 mSDsluCounter, 599 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 244 mSDsCounter, 114 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 711 IncrementalHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 114 mSolverCounterUnsat, 355 mSDtfsCounter, 711 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5849 GetRequests, 5648 SyntacticMatches, 7 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=760occurred in iteration=19, InterpolantAutomatonStates: 123, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 635 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 22 PreInvPairs, 779 NumberOfFragments, 200 HoareAnnotationTreeSize, 22 FomulaSimplifications, 3357 FormulaSimplificationTreeSizeReduction, 197.6s HoareSimplificationTime, 22 FomulaSimplificationsInter, 148991 FormulaSimplificationTreeSizeReductionInter, 13.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((a < 7 && !(d < 6)) && b < 7) && !(c < 6)) && c < 7) && d < 7) && !(b < 6) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((c <= 5 && b < 6) && d < 7) && a < 6 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((!(d < 6) && b < 6) && c < 7) && d < 7) && a < 6 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((!(d < 6) && b < 7) && !(c < 6)) && c < 7) && d < 7) && a < 6 - ProcedureContractResult [Line: 15]: Procedure Contract for main Derived contract for procedure main: 1 RESULT: Ultimate proved your program to be correct! [2022-04-06 21:07:09,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...