/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_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 21:04:15,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 21:04:15,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 21:04:15,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 21:04:15,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 21:04:15,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 21:04:15,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 21:04:15,653 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 21:04:15,661 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 21:04:15,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 21:04:15,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 21:04:15,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 21:04:15,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 21:04:15,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 21:04:15,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 21:04:15,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 21:04:15,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 21:04:15,664 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 21:04:15,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 21:04:15,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 21:04:15,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 21:04:15,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 21:04:15,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 21:04:15,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:04:15,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 21:04:15,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 21:04:15,665 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 21:04:15,665 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 21:04:15,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 21:04:15,665 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 21:04:15,665 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 21:04:15,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 21:04:15,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 21:04:15,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 21:04:15,864 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 21:04:15,865 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 21:04:15,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_6.c [2022-04-06 21:04:15,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d1d8d324/5f957916034c40af8d34c8b3365a4091/FLAGc3e5ba2be [2022-04-06 21:04:16,231 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 21:04:16,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_6.c [2022-04-06 21:04:16,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d1d8d324/5f957916034c40af8d34c8b3365a4091/FLAGc3e5ba2be [2022-04-06 21:04:16,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d1d8d324/5f957916034c40af8d34c8b3365a4091 [2022-04-06 21:04:16,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 21:04:16,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 21:04:16,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 21:04:16,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 21:04:16,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 21:04:16,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:04:16" (1/1) ... [2022-04-06 21:04:16,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e604226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:04:16, skipping insertion in model container [2022-04-06 21:04:16,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:04:16" (1/1) ... [2022-04-06 21:04:16,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 21:04:16,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 21:04:16,805 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_6.c[959,972] [2022-04-06 21:04:16,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:04:16,813 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 21:04:16,822 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_6.c[959,972] [2022-04-06 21:04:16,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:04:16,831 INFO L208 MainTranslator]: Completed translation [2022-04-06 21:04:16,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:04:16 WrapperNode [2022-04-06 21:04:16,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 21:04:16,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 21:04:16,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 21:04:16,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 21:04:16,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:04:16" (1/1) ... [2022-04-06 21:04:16,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:04:16" (1/1) ... [2022-04-06 21:04:16,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:04:16" (1/1) ... [2022-04-06 21:04:16,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:04:16" (1/1) ... [2022-04-06 21:04:16,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:04:16" (1/1) ... [2022-04-06 21:04:16,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:04:16" (1/1) ... [2022-04-06 21:04:16,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:04:16" (1/1) ... [2022-04-06 21:04:16,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 21:04:16,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 21:04:16,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 21:04:16,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 21:04:16,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:04:16" (1/1) ... [2022-04-06 21:04:16,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:04:16,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:16,872 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 21:04:16,879 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 21:04:16,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 21:04:16,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 21:04:16,897 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 21:04:16,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 21:04:16,898 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 21:04:16,898 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 21:04:16,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 21:04:16,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 21:04:16,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 21:04:16,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 21:04:16,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 21:04:16,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 21:04:16,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 21:04:16,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 21:04:16,937 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 21:04:16,939 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 21:04:17,019 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 21:04:17,023 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 21:04:17,023 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-04-06 21:04:17,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:04:17 BoogieIcfgContainer [2022-04-06 21:04:17,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 21:04:17,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 21:04:17,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 21:04:17,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 21:04:17,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:04:16" (1/3) ... [2022-04-06 21:04:17,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394a83ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:04:17, skipping insertion in model container [2022-04-06 21:04:17,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:04:16" (2/3) ... [2022-04-06 21:04:17,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394a83ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:04:17, skipping insertion in model container [2022-04-06 21:04:17,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:04:17" (3/3) ... [2022-04-06 21:04:17,030 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_6.c [2022-04-06 21:04:17,033 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 21:04:17,034 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 21:04:17,084 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 21:04:17,089 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 21:04:17,089 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 21:04:17,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 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 21:04:17,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-04-06 21:04:17,121 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:17,121 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:17,122 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:17,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1187922237, now seen corresponding path program 1 times [2022-04-06 21:04:17,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:17,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [471137993] [2022-04-06 21:04:17,138 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:04:17,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1187922237, now seen corresponding path program 2 times [2022-04-06 21:04:17,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:17,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526340530] [2022-04-06 21:04:17,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:17,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:17,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:17,306 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 21:04:17,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:17,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526340530] [2022-04-06 21:04:17,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526340530] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:17,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:17,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:04:17,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:17,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [471137993] [2022-04-06 21:04:17,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [471137993] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:17,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:17,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:04:17,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17138128] [2022-04-06 21:04:17,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:17,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:04:17,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:17,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:04:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:04:17,344 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 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 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 21:04:17,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:17,436 INFO L93 Difference]: Finished difference Result 58 states and 94 transitions. [2022-04-06 21:04:17,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:04:17,439 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 21:04:17,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:17,448 INFO L225 Difference]: With dead ends: 58 [2022-04-06 21:04:17,449 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 21:04:17,452 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 21:04:17,455 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 56 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:17,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 38 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:17,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 21:04:17,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2022-04-06 21:04:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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 21:04:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-04-06 21:04:17,490 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 9 [2022-04-06 21:04:17,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:17,490 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-04-06 21:04:17,490 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 21:04:17,490 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-04-06 21:04:17,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 21:04:17,491 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:17,491 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:17,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 21:04:17,491 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:17,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:17,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1138963186, now seen corresponding path program 1 times [2022-04-06 21:04:17,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:17,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2034253583] [2022-04-06 21:04:17,507 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:17,507 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:17,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1138963186, now seen corresponding path program 2 times [2022-04-06 21:04:17,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:17,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478600748] [2022-04-06 21:04:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:17,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:17,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:17,557 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 21:04:17,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:17,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478600748] [2022-04-06 21:04:17,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478600748] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:17,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:17,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:04:17,558 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:17,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2034253583] [2022-04-06 21:04:17,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2034253583] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:17,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:17,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:04:17,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030791901] [2022-04-06 21:04:17,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:17,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:04:17,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:17,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:04:17,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:04:17,560 INFO L87 Difference]: Start difference. First operand 22 states and 27 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 21:04:17,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:17,595 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-04-06 21:04:17,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:04:17,595 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 21:04:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:17,596 INFO L225 Difference]: With dead ends: 47 [2022-04-06 21:04:17,596 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 21:04:17,596 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 21:04:17,597 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:17,598 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 31 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:17,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 21:04:17,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-04-06 21:04:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 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 21:04:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-04-06 21:04:17,603 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 12 [2022-04-06 21:04:17,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:17,604 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-04-06 21:04:17,604 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 21:04:17,604 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-04-06 21:04:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 21:04:17,604 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:17,604 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:17,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 21:04:17,605 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:17,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:17,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1811082743, now seen corresponding path program 1 times [2022-04-06 21:04:17,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:17,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1438347136] [2022-04-06 21:04:17,612 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:17,615 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:17,616 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:17,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1811082743, now seen corresponding path program 2 times [2022-04-06 21:04:17,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:17,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475301195] [2022-04-06 21:04:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:17,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:17,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:17,673 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 21:04:17,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:17,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475301195] [2022-04-06 21:04:17,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475301195] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:17,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:17,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:04:17,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:17,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1438347136] [2022-04-06 21:04:17,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1438347136] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:17,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:17,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:04:17,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101873589] [2022-04-06 21:04:17,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:17,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:04:17,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:17,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:04:17,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:04:17,676 INFO L87 Difference]: Start difference. First operand 23 states and 28 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 21:04:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:17,731 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-04-06 21:04:17,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:04:17,732 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 21:04:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:17,732 INFO L225 Difference]: With dead ends: 47 [2022-04-06 21:04:17,733 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 21:04:17,733 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 21:04:17,734 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:17,734 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:17,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 21:04:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-04-06 21:04:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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 21:04:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-04-06 21:04:17,739 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2022-04-06 21:04:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:17,739 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-04-06 21:04:17,739 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 21:04:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-04-06 21:04:17,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 21:04:17,740 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:17,740 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 21:04:17,740 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 21:04:17,740 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:17,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:17,741 INFO L85 PathProgramCache]: Analyzing trace with hash 602992382, now seen corresponding path program 1 times [2022-04-06 21:04:17,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:17,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1143772118] [2022-04-06 21:04:17,756 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:17,756 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:17,762 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:17,762 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:17,762 INFO L85 PathProgramCache]: Analyzing trace with hash 602992382, now seen corresponding path program 2 times [2022-04-06 21:04:17,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:17,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136738526] [2022-04-06 21:04:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:17,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:17,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:17,815 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 21:04:17,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:17,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136738526] [2022-04-06 21:04:17,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136738526] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:17,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:17,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:04:17,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:17,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1143772118] [2022-04-06 21:04:17,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1143772118] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:17,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:17,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:04:17,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17515527] [2022-04-06 21:04:17,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:17,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:04:17,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:17,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:04:17,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:04:17,818 INFO L87 Difference]: Start difference. First operand 24 states and 29 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 21:04:17,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:17,855 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2022-04-06 21:04:17,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:04:17,856 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 21:04:17,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:17,856 INFO L225 Difference]: With dead ends: 47 [2022-04-06 21:04:17,856 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 21:04:17,857 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 21:04:17,857 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:17,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 31 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 21:04:17,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-04-06 21:04:17,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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 21:04:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-04-06 21:04:17,863 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 18 [2022-04-06 21:04:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:17,863 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-04-06 21:04:17,863 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 21:04:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-04-06 21:04:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 21:04:17,864 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:17,864 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, 1] [2022-04-06 21:04:17,864 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 21:04:17,864 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:17,865 INFO L85 PathProgramCache]: Analyzing trace with hash 257821531, now seen corresponding path program 1 times [2022-04-06 21:04:17,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:17,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [53137306] [2022-04-06 21:04:17,883 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:17,883 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:17,883 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:17,883 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:17,883 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:17,886 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:17,886 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:17,886 INFO L85 PathProgramCache]: Analyzing trace with hash 257821531, now seen corresponding path program 2 times [2022-04-06 21:04:17,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:17,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468965793] [2022-04-06 21:04:17,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:17,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:17,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:17,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:17,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468965793] [2022-04-06 21:04:17,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468965793] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:17,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:17,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:04:17,935 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:17,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [53137306] [2022-04-06 21:04:17,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [53137306] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:17,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:17,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:04:17,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367531599] [2022-04-06 21:04:17,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:17,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:04:17,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:17,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:04:17,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:04:17,936 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 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 21:04:17,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:17,980 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-04-06 21:04:17,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:04:17,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 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 21 [2022-04-06 21:04:17,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:17,982 INFO L225 Difference]: With dead ends: 47 [2022-04-06 21:04:17,982 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 21:04:17,982 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 21:04:17,983 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:17,983 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 31 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:17,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 21:04:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-04-06 21:04:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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 21:04:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-04-06 21:04:17,988 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 21 [2022-04-06 21:04:17,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:17,988 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-04-06 21:04:17,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 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 21:04:17,989 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-04-06 21:04:17,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 21:04:17,989 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:17,989 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, 1, 1, 1, 1] [2022-04-06 21:04:17,989 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 21:04:17,989 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:17,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:17,990 INFO L85 PathProgramCache]: Analyzing trace with hash 479277370, now seen corresponding path program 1 times [2022-04-06 21:04:17,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:17,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1697773058] [2022-04-06 21:04:18,018 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,019 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,019 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,019 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,020 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,020 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,021 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,021 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,021 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,028 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,029 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:18,029 INFO L85 PathProgramCache]: Analyzing trace with hash 479277370, now seen corresponding path program 2 times [2022-04-06 21:04:18,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:18,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798107689] [2022-04-06 21:04:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:18,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:18,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:18,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:18,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798107689] [2022-04-06 21:04:18,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798107689] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:18,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:18,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:04:18,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:18,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1697773058] [2022-04-06 21:04:18,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1697773058] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:18,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:18,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:04:18,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361914665] [2022-04-06 21:04:18,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:18,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:04:18,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:18,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:04:18,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:04:18,089 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 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 21:04:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:18,133 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-04-06 21:04:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:04:18,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 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 24 [2022-04-06 21:04:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:18,134 INFO L225 Difference]: With dead ends: 47 [2022-04-06 21:04:18,135 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 21:04:18,135 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 21:04:18,136 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:18,136 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 31 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:18,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 21:04:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-04-06 21:04:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-04-06 21:04:18,141 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 24 [2022-04-06 21:04:18,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:18,142 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-04-06 21:04:18,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 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 21:04:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-04-06 21:04:18,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 21:04:18,142 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:18,142 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, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:18,142 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 21:04:18,143 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:18,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:18,143 INFO L85 PathProgramCache]: Analyzing trace with hash 939861656, now seen corresponding path program 1 times [2022-04-06 21:04:18,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:18,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [472047998] [2022-04-06 21:04:18,175 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,175 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,177 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,177 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,177 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,177 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,178 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,178 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,178 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,180 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,180 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:18,180 INFO L85 PathProgramCache]: Analyzing trace with hash 939861656, now seen corresponding path program 2 times [2022-04-06 21:04:18,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:18,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737492108] [2022-04-06 21:04:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:18,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:18,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:18,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:18,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737492108] [2022-04-06 21:04:18,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737492108] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:18,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845852061] [2022-04-06 21:04:18,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:18,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:18,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:18,247 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 21:04:18,248 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 21:04:18,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:18,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:18,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 21:04:18,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:18,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:18,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845852061] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:18,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:18,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 21:04:18,454 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:18,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [472047998] [2022-04-06 21:04:18,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [472047998] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:18,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:18,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:04:18,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235274313] [2022-04-06 21:04:18,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:18,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:04:18,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:18,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:04:18,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:04:18,458 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 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 21:04:18,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:18,514 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2022-04-06 21:04:18,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:04:18,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 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 26 [2022-04-06 21:04:18,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:18,516 INFO L225 Difference]: With dead ends: 50 [2022-04-06 21:04:18,516 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 21:04:18,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:18,519 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:18,520 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 36 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 21:04:18,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-04-06 21:04:18,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.24) internal successors, (31), 25 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 21:04:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-04-06 21:04:18,531 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 26 [2022-04-06 21:04:18,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:18,531 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-04-06 21:04:18,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 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 21:04:18,532 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-04-06 21:04:18,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 21:04:18,532 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:18,532 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, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:18,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:18,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:18,744 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:18,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:18,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1179729014, now seen corresponding path program 3 times [2022-04-06 21:04:18,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:18,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [429455745] [2022-04-06 21:04:18,791 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,792 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,792 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,792 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,792 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,792 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,792 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,793 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,793 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,799 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,799 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:18,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1179729014, now seen corresponding path program 4 times [2022-04-06 21:04:18,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:18,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85054525] [2022-04-06 21:04:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:18,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:18,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:04:18,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:18,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85054525] [2022-04-06 21:04:18,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85054525] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:18,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379451377] [2022-04-06 21:04:18,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:04:18,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:18,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:18,859 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 21:04:18,861 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 21:04:18,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:04:18,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:18,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:04:18,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:18,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:04:19,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379451377] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:19,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:19,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-04-06 21:04:19,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:19,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [429455745] [2022-04-06 21:04:19,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [429455745] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:19,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:19,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:04:19,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630999305] [2022-04-06 21:04:19,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:19,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:04:19,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:19,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:04:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:04:19,022 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 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 21:04:19,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:19,062 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2022-04-06 21:04:19,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:04:19,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 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 28 [2022-04-06 21:04:19,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:19,062 INFO L225 Difference]: With dead ends: 64 [2022-04-06 21:04:19,062 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 21:04:19,063 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:04:19,063 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:19,063 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 36 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 21:04:19,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-04-06 21:04:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-04-06 21:04:19,069 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 28 [2022-04-06 21:04:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:19,070 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-04-06 21:04:19,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 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 21:04:19,070 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-04-06 21:04:19,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 21:04:19,071 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:19,071 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, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:19,111 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 21:04:19,287 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,SelfDestructingSolverStorable7 [2022-04-06 21:04:19,288 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:19,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:19,288 INFO L85 PathProgramCache]: Analyzing trace with hash -162224389, now seen corresponding path program 5 times [2022-04-06 21:04:19,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:19,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1109587212] [2022-04-06 21:04:19,392 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:19,392 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:19,392 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:19,393 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:19,393 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:19,393 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:19,393 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:19,393 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:19,393 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:19,400 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:19,400 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:19,400 INFO L85 PathProgramCache]: Analyzing trace with hash -162224389, now seen corresponding path program 6 times [2022-04-06 21:04:19,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:19,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052244742] [2022-04-06 21:04:19,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:19,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:19,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 21:04:19,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:19,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052244742] [2022-04-06 21:04:19,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052244742] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:19,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994215767] [2022-04-06 21:04:19,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:04:19,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:19,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:19,453 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 21:04:19,454 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 21:04:19,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:04:19,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:19,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 21:04:19,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 21:04:19,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 21:04:19,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994215767] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:19,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:19,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-04-06 21:04:19,615 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:19,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1109587212] [2022-04-06 21:04:19,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1109587212] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:19,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:19,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:04:19,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655896059] [2022-04-06 21:04:19,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:19,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:04:19,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:19,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:04:19,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:04:19,616 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 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 21:04:19,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:19,692 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2022-04-06 21:04:19,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:04:19,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 21:04:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:19,695 INFO L225 Difference]: With dead ends: 98 [2022-04-06 21:04:19,695 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 21:04:19,695 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 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 21:04:19,706 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:19,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 36 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:19,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 21:04:19,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 53. [2022-04-06 21:04:19,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-04-06 21:04:19,731 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 35 [2022-04-06 21:04:19,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:19,732 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-04-06 21:04:19,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 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 21:04:19,732 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-04-06 21:04:19,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 21:04:19,737 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:19,737 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, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:19,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:19,953 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:19,954 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:19,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:19,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1663191198, now seen corresponding path program 7 times [2022-04-06 21:04:19,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:19,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1210481091] [2022-04-06 21:04:20,122 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:20,122 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:20,122 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:20,123 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:20,127 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:20,127 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:20,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1663191198, now seen corresponding path program 8 times [2022-04-06 21:04:20,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:20,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496738898] [2022-04-06 21:04:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:20,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:20,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-04-06 21:04:20,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:20,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496738898] [2022-04-06 21:04:20,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496738898] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:20,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027727990] [2022-04-06 21:04:20,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:20,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:20,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:20,169 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 21:04:20,170 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 21:04:20,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:20,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:20,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:04:20,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 49 proven. 4 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 21:04:20,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 49 proven. 4 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 21:04:20,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027727990] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:20,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:20,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-04-06 21:04:20,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:20,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1210481091] [2022-04-06 21:04:20,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1210481091] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:20,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:20,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:04:20,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434783963] [2022-04-06 21:04:20,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:20,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:04:20,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:20,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:04:20,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:04:20,354 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 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 21:04:20,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:20,421 INFO L93 Difference]: Finished difference Result 172 states and 205 transitions. [2022-04-06 21:04:20,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:04:20,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 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 52 [2022-04-06 21:04:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:20,423 INFO L225 Difference]: With dead ends: 172 [2022-04-06 21:04:20,423 INFO L226 Difference]: Without dead ends: 126 [2022-04-06 21:04:20,423 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 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 21:04:20,424 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:20,424 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 31 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:20,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-04-06 21:04:20,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 90. [2022-04-06 21:04:20,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.197674418604651) internal successors, (103), 86 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2022-04-06 21:04:20,438 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 52 [2022-04-06 21:04:20,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:20,438 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2022-04-06 21:04:20,438 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 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 21:04:20,439 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2022-04-06 21:04:20,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 21:04:20,439 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:20,439 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, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:20,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:20,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:20,655 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:20,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:20,656 INFO L85 PathProgramCache]: Analyzing trace with hash 356997719, now seen corresponding path program 9 times [2022-04-06 21:04:20,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:20,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1776622485] [2022-04-06 21:04:20,961 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:20,962 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:20,962 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:20,972 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:20,972 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:20,973 INFO L85 PathProgramCache]: Analyzing trace with hash 356997719, now seen corresponding path program 10 times [2022-04-06 21:04:20,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:20,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650562217] [2022-04-06 21:04:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:20,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:21,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2022-04-06 21:04:21,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:21,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650562217] [2022-04-06 21:04:21,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650562217] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:21,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325958084] [2022-04-06 21:04:21,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:04:21,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:21,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:21,025 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 21:04:21,034 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 21:04:21,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:04:21,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:21,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:04:21,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 111 proven. 4 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-04-06 21:04:21,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 111 proven. 4 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-04-06 21:04:21,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325958084] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:21,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:21,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-04-06 21:04:21,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:21,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1776622485] [2022-04-06 21:04:21,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1776622485] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:21,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:21,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:04:21,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251002692] [2022-04-06 21:04:21,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:21,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:04:21,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:21,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:04:21,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:04:21,358 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 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 21:04:21,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:21,437 INFO L93 Difference]: Finished difference Result 326 states and 389 transitions. [2022-04-06 21:04:21,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:04:21,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-04-06 21:04:21,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:21,441 INFO L225 Difference]: With dead ends: 326 [2022-04-06 21:04:21,441 INFO L226 Difference]: Without dead ends: 243 [2022-04-06 21:04:21,444 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 174 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 21:04:21,444 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 73 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:21,444 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 31 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:21,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-04-06 21:04:21,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 167. [2022-04-06 21:04:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 163 states have (on average 1.196319018404908) internal successors, (195), 163 states have internal predecessors, (195), 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 21:04:21,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 198 transitions. [2022-04-06 21:04:21,486 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 198 transitions. Word has length 89 [2022-04-06 21:04:21,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:21,486 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 198 transitions. [2022-04-06 21:04:21,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 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 21:04:21,486 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 198 transitions. [2022-04-06 21:04:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-04-06 21:04:21,487 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:21,487 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:21,506 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 21:04:21,704 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,SelfDestructingSolverStorable10 [2022-04-06 21:04:21,704 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:21,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash -682113262, now seen corresponding path program 11 times [2022-04-06 21:04:21,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:21,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [147049791] [2022-04-06 21:04:22,243 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:22,244 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:22,263 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:22,263 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:22,263 INFO L85 PathProgramCache]: Analyzing trace with hash -682113262, now seen corresponding path program 12 times [2022-04-06 21:04:22,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:22,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823650671] [2022-04-06 21:04:22,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:22,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:22,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2140 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2139 trivial. 0 not checked. [2022-04-06 21:04:22,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:22,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823650671] [2022-04-06 21:04:22,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823650671] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:22,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627438653] [2022-04-06 21:04:22,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:04:22,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:22,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:22,360 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 21:04:22,362 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 21:04:22,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:04:22,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:22,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 21:04:22,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2140 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2139 trivial. 0 not checked. [2022-04-06 21:04:22,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2140 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2139 trivial. 0 not checked. [2022-04-06 21:04:22,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627438653] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:22,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:22,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 21:04:22,961 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:22,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [147049791] [2022-04-06 21:04:22,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [147049791] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:22,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:22,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:04:22,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781641251] [2022-04-06 21:04:22,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:22,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:04:22,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:22,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:04:22,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:04:22,962 INFO L87 Difference]: Start difference. First operand 167 states and 198 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 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 21:04:23,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:23,066 INFO L93 Difference]: Finished difference Result 483 states and 576 transitions. [2022-04-06 21:04:23,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:04:23,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 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 166 [2022-04-06 21:04:23,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:23,068 INFO L225 Difference]: With dead ends: 483 [2022-04-06 21:04:23,069 INFO L226 Difference]: Without dead ends: 480 [2022-04-06 21:04:23,069 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:23,069 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 85 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:23,069 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 36 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-04-06 21:04:23,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 324. [2022-04-06 21:04:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 320 states have (on average 1.196875) internal successors, (383), 320 states have internal predecessors, (383), 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 21:04:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 386 transitions. [2022-04-06 21:04:23,105 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 386 transitions. Word has length 166 [2022-04-06 21:04:23,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:23,106 INFO L478 AbstractCegarLoop]: Abstraction has 324 states and 386 transitions. [2022-04-06 21:04:23,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 2 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 21:04:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 386 transitions. [2022-04-06 21:04:23,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-04-06 21:04:23,108 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:23,108 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 32, 32, 32, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:23,126 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 21:04:23,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:23,321 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:23,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1080403235, now seen corresponding path program 13 times [2022-04-06 21:04:23,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:23,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [929694738] [2022-04-06 21:04:24,231 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:24,248 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:24,249 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:24,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1080403235, now seen corresponding path program 14 times [2022-04-06 21:04:24,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:24,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55926980] [2022-04-06 21:04:24,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:24,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:24,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8715 backedges. 491 proven. 4 refuted. 0 times theorem prover too weak. 8220 trivial. 0 not checked. [2022-04-06 21:04:24,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:24,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55926980] [2022-04-06 21:04:24,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55926980] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:24,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452457217] [2022-04-06 21:04:24,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:24,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:24,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:24,314 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 21:04:24,315 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 21:04:24,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:24,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:24,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:04:24,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8715 backedges. 491 proven. 4 refuted. 0 times theorem prover too weak. 8220 trivial. 0 not checked. [2022-04-06 21:04:24,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8715 backedges. 491 proven. 4 refuted. 0 times theorem prover too weak. 8220 trivial. 0 not checked. [2022-04-06 21:04:25,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452457217] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:25,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:25,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 21:04:25,161 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:25,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [929694738] [2022-04-06 21:04:25,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [929694738] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:25,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:25,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:04:25,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709958658] [2022-04-06 21:04:25,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:25,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:04:25,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:25,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:04:25,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:25,162 INFO L87 Difference]: Start difference. First operand 324 states and 386 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (2), 2 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 21:04:25,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:25,262 INFO L93 Difference]: Finished difference Result 728 states and 883 transitions. [2022-04-06 21:04:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:04:25,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (2), 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 323 [2022-04-06 21:04:25,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:25,264 INFO L225 Difference]: With dead ends: 728 [2022-04-06 21:04:25,264 INFO L226 Difference]: Without dead ends: 420 [2022-04-06 21:04:25,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 644 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 21:04:25,266 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 36 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 21:04:25,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 36 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:25,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-04-06 21:04:25,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 388. [2022-04-06 21:04:25,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 384 states have (on average 1.1640625) internal successors, (447), 384 states have internal predecessors, (447), 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 21:04:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 450 transitions. [2022-04-06 21:04:25,310 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 450 transitions. Word has length 323 [2022-04-06 21:04:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:25,310 INFO L478 AbstractCegarLoop]: Abstraction has 388 states and 450 transitions. [2022-04-06 21:04:25,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (2), 2 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 21:04:25,310 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 450 transitions. [2022-04-06 21:04:25,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-04-06 21:04:25,313 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:25,313 INFO L499 BasicCegarLoop]: trace histogram [96, 96, 32, 32, 32, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:25,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:25,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:25,524 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:25,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:25,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1817010467, now seen corresponding path program 15 times [2022-04-06 21:04:25,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:25,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [918317954] [2022-04-06 21:04:26,368 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:26,396 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:26,396 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:26,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1817010467, now seen corresponding path program 16 times [2022-04-06 21:04:26,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:26,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382159019] [2022-04-06 21:04:26,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:26,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:26,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14827 backedges. 863 proven. 9 refuted. 0 times theorem prover too weak. 13955 trivial. 0 not checked. [2022-04-06 21:04:26,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:26,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382159019] [2022-04-06 21:04:26,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382159019] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:26,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191477468] [2022-04-06 21:04:26,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:04:26,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:26,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:26,476 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 21:04:26,477 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 21:04:26,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:04:26,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:26,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:04:26,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 14827 backedges. 863 proven. 9 refuted. 0 times theorem prover too weak. 13955 trivial. 0 not checked. [2022-04-06 21:04:27,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14827 backedges. 863 proven. 9 refuted. 0 times theorem prover too weak. 13955 trivial. 0 not checked. [2022-04-06 21:04:27,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191477468] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:27,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:27,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-06 21:04:27,523 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:27,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [918317954] [2022-04-06 21:04:27,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [918317954] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:27,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:27,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:04:27,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658104367] [2022-04-06 21:04:27,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:27,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:04:27,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:27,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:04:27,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:27,524 INFO L87 Difference]: Start difference. First operand 388 states and 450 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 21:04:27,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:27,653 INFO L93 Difference]: Finished difference Result 854 states and 1009 transitions. [2022-04-06 21:04:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:04:27,653 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 387 [2022-04-06 21:04:27,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:27,655 INFO L225 Difference]: With dead ends: 854 [2022-04-06 21:04:27,655 INFO L226 Difference]: Without dead ends: 484 [2022-04-06 21:04:27,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 772 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 21:04:27,656 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:27,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 36 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:27,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-04-06 21:04:27,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 452. [2022-04-06 21:04:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 448 states have (on average 1.140625) internal successors, (511), 448 states have internal predecessors, (511), 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 21:04:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 514 transitions. [2022-04-06 21:04:27,704 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 514 transitions. Word has length 387 [2022-04-06 21:04:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:27,704 INFO L478 AbstractCegarLoop]: Abstraction has 452 states and 514 transitions. [2022-04-06 21:04:27,704 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 21:04:27,704 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 514 transitions. [2022-04-06 21:04:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-04-06 21:04:27,708 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:27,708 INFO L499 BasicCegarLoop]: trace histogram [128, 128, 32, 32, 32, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:27,729 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 21:04:27,921 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,SelfDestructingSolverStorable13 [2022-04-06 21:04:27,921 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:27,922 INFO L85 PathProgramCache]: Analyzing trace with hash -543875805, now seen corresponding path program 17 times [2022-04-06 21:04:27,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:27,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1797616332] [2022-04-06 21:04:28,813 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:28,856 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:28,856 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:28,856 INFO L85 PathProgramCache]: Analyzing trace with hash -543875805, now seen corresponding path program 18 times [2022-04-06 21:04:28,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:28,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080828888] [2022-04-06 21:04:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:28,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:28,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 22987 backedges. 1359 proven. 16 refuted. 0 times theorem prover too weak. 21612 trivial. 0 not checked. [2022-04-06 21:04:28,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:28,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080828888] [2022-04-06 21:04:28,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080828888] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:28,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558022028] [2022-04-06 21:04:28,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:04:28,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:28,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:28,947 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 21:04:28,949 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 21:04:29,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 21:04:29,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:29,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 21:04:29,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 22987 backedges. 8909 proven. 16 refuted. 0 times theorem prover too weak. 14062 trivial. 0 not checked. [2022-04-06 21:04:29,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 22987 backedges. 8909 proven. 16 refuted. 0 times theorem prover too weak. 14062 trivial. 0 not checked. [2022-04-06 21:04:29,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558022028] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:29,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:29,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-06 21:04:29,986 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:29,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1797616332] [2022-04-06 21:04:29,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1797616332] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:29,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:29,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:04:29,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503984337] [2022-04-06 21:04:29,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:29,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:04:29,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:29,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:04:29,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:29,987 INFO L87 Difference]: Start difference. First operand 452 states and 514 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 1 states have call successors, (2), 2 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 21:04:30,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:30,115 INFO L93 Difference]: Finished difference Result 980 states and 1135 transitions. [2022-04-06 21:04:30,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:04:30,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 1 states have call successors, (2), 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 451 [2022-04-06 21:04:30,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:30,119 INFO L225 Difference]: With dead ends: 980 [2022-04-06 21:04:30,119 INFO L226 Difference]: Without dead ends: 548 [2022-04-06 21:04:30,120 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 915 GetRequests, 901 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 21:04:30,120 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:30,120 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 36 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:30,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-04-06 21:04:30,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 516. [2022-04-06 21:04:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 512 states have (on average 1.123046875) internal successors, (575), 512 states have internal predecessors, (575), 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 21:04:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 578 transitions. [2022-04-06 21:04:30,177 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 578 transitions. Word has length 451 [2022-04-06 21:04:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:30,177 INFO L478 AbstractCegarLoop]: Abstraction has 516 states and 578 transitions. [2022-04-06 21:04:30,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 1 states have call successors, (2), 2 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 21:04:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 578 transitions. [2022-04-06 21:04:30,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2022-04-06 21:04:30,179 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:30,180 INFO L499 BasicCegarLoop]: trace histogram [160, 160, 32, 32, 32, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:30,196 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 21:04:30,386 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,SelfDestructingSolverStorable14 [2022-04-06 21:04:30,386 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:30,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:30,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1707288285, now seen corresponding path program 19 times [2022-04-06 21:04:30,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:30,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1830170838] [2022-04-06 21:04:31,203 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:31,249 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:31,249 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:31,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1707288285, now seen corresponding path program 20 times [2022-04-06 21:04:31,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:31,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163512230] [2022-04-06 21:04:31,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:31,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:31,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 33195 backedges. 1979 proven. 25 refuted. 0 times theorem prover too weak. 31191 trivial. 0 not checked. [2022-04-06 21:04:31,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:31,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163512230] [2022-04-06 21:04:31,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163512230] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:31,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014514352] [2022-04-06 21:04:31,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:31,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:31,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:31,347 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 21:04:31,382 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 21:04:31,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:31,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:31,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:04:31,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 33195 backedges. 1979 proven. 25 refuted. 0 times theorem prover too weak. 31191 trivial. 0 not checked. [2022-04-06 21:04:31,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 33195 backedges. 1979 proven. 25 refuted. 0 times theorem prover too weak. 31191 trivial. 0 not checked. [2022-04-06 21:04:32,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014514352] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:32,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:32,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 10 [2022-04-06 21:04:32,567 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:32,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1830170838] [2022-04-06 21:04:32,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1830170838] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:32,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:32,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:04:32,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087950702] [2022-04-06 21:04:32,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:32,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:04:32,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:32,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:04:32,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:32,568 INFO L87 Difference]: Start difference. First operand 516 states and 578 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (2), 2 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 21:04:32,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:32,712 INFO L93 Difference]: Finished difference Result 1074 states and 1229 transitions. [2022-04-06 21:04:32,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:04:32,713 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (2), 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 515 [2022-04-06 21:04:32,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:32,714 INFO L225 Difference]: With dead ends: 1074 [2022-04-06 21:04:32,714 INFO L226 Difference]: Without dead ends: 580 [2022-04-06 21:04:32,715 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1045 GetRequests, 1030 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 21:04:32,716 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:32,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 36 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:32,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-04-06 21:04:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2022-04-06 21:04:32,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 576 states have (on average 1.109375) internal successors, (639), 576 states have internal predecessors, (639), 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 21:04:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 642 transitions. [2022-04-06 21:04:32,806 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 642 transitions. Word has length 515 [2022-04-06 21:04:32,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:32,806 INFO L478 AbstractCegarLoop]: Abstraction has 580 states and 642 transitions. [2022-04-06 21:04:32,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (2), 2 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 21:04:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 642 transitions. [2022-04-06 21:04:32,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2022-04-06 21:04:32,808 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:32,808 INFO L499 BasicCegarLoop]: trace histogram [192, 192, 32, 32, 32, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:32,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:33,023 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,SelfDestructingSolverStorable15 [2022-04-06 21:04:33,024 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:33,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:33,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1673226973, now seen corresponding path program 21 times [2022-04-06 21:04:33,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:33,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1211706909] [2022-04-06 21:04:33,838 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:33,895 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:33,895 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:33,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1673226973, now seen corresponding path program 22 times [2022-04-06 21:04:33,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:33,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967974173] [2022-04-06 21:04:33,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:33,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:34,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 45451 backedges. 5336 proven. 89 refuted. 0 times theorem prover too weak. 40026 trivial. 0 not checked. [2022-04-06 21:04:34,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:34,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967974173] [2022-04-06 21:04:34,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967974173] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:34,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232408400] [2022-04-06 21:04:34,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:04:34,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:34,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:34,019 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 21:04:34,020 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 21:04:34,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:04:34,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:34,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:04:34,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 45451 backedges. 5336 proven. 89 refuted. 0 times theorem prover too weak. 40026 trivial. 0 not checked. [2022-04-06 21:04:34,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 45451 backedges. 5336 proven. 89 refuted. 0 times theorem prover too weak. 40026 trivial. 0 not checked. [2022-04-06 21:04:35,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232408400] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:35,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:35,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 21:04:35,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:35,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1211706909] [2022-04-06 21:04:35,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1211706909] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:35,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:35,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:04:35,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074457781] [2022-04-06 21:04:35,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:35,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:04:35,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:35,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:04:35,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:35,388 INFO L87 Difference]: Start difference. First operand 580 states and 642 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:35,574 INFO L93 Difference]: Finished difference Result 1583 states and 1752 transitions. [2022-04-06 21:04:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:04:35,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 579 [2022-04-06 21:04:35,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:35,577 INFO L225 Difference]: With dead ends: 1583 [2022-04-06 21:04:35,577 INFO L226 Difference]: Without dead ends: 1044 [2022-04-06 21:04:35,578 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1167 GetRequests, 1156 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 21:04:35,579 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 45 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:35,579 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 36 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:35,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-04-06 21:04:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 820. [2022-04-06 21:04:35,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 816 states have (on average 1.0968137254901962) internal successors, (895), 816 states have internal predecessors, (895), 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 21:04:35,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 898 transitions. [2022-04-06 21:04:35,683 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 898 transitions. Word has length 579 [2022-04-06 21:04:35,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:35,683 INFO L478 AbstractCegarLoop]: Abstraction has 820 states and 898 transitions. [2022-04-06 21:04:35,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 898 transitions. [2022-04-06 21:04:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2022-04-06 21:04:35,687 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:35,687 INFO L499 BasicCegarLoop]: trace histogram [288, 288, 48, 48, 48, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:35,706 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 21:04:35,903 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,SelfDestructingSolverStorable16 [2022-04-06 21:04:35,904 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1899981277, now seen corresponding path program 23 times [2022-04-06 21:04:35,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:35,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1535762579] [2022-04-06 21:04:36,781 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:36,876 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:36,876 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:36,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1899981277, now seen corresponding path program 24 times [2022-04-06 21:04:36,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:36,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766522985] [2022-04-06 21:04:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:36,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:37,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 101267 backedges. 11891 proven. 264 refuted. 0 times theorem prover too weak. 89112 trivial. 0 not checked. [2022-04-06 21:04:37,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:37,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766522985] [2022-04-06 21:04:37,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766522985] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:37,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344213854] [2022-04-06 21:04:37,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:04:37,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:37,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:37,044 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 21:04:37,045 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 21:04:37,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 69 check-sat command(s) [2022-04-06 21:04:37,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:37,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:04:37,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 101267 backedges. 11917 proven. 264 refuted. 0 times theorem prover too weak. 89086 trivial. 0 not checked. [2022-04-06 21:04:37,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 101267 backedges. 11917 proven. 264 refuted. 0 times theorem prover too weak. 89086 trivial. 0 not checked. [2022-04-06 21:04:38,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344213854] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:38,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:38,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-06 21:04:38,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:38,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1535762579] [2022-04-06 21:04:38,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1535762579] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:38,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:38,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:04:38,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106914501] [2022-04-06 21:04:38,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:38,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:04:38,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:38,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:04:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:38,650 INFO L87 Difference]: Start difference. First operand 820 states and 898 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 21:04:38,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:38,875 INFO L93 Difference]: Finished difference Result 2048 states and 2248 transitions. [2022-04-06 21:04:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:04:38,875 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 819 [2022-04-06 21:04:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:38,879 INFO L225 Difference]: With dead ends: 2048 [2022-04-06 21:04:38,879 INFO L226 Difference]: Without dead ends: 1284 [2022-04-06 21:04:38,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1649 GetRequests, 1636 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 21:04:38,880 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:38,881 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 31 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:38,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-04-06 21:04:39,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1060. [2022-04-06 21:04:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1056 states have (on average 1.089962121212121) internal successors, (1151), 1056 states have internal predecessors, (1151), 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 21:04:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1154 transitions. [2022-04-06 21:04:39,030 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1154 transitions. Word has length 819 [2022-04-06 21:04:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:39,030 INFO L478 AbstractCegarLoop]: Abstraction has 1060 states and 1154 transitions. [2022-04-06 21:04:39,030 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 21:04:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1154 transitions. [2022-04-06 21:04:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2022-04-06 21:04:39,036 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:39,036 INFO L499 BasicCegarLoop]: trace histogram [384, 384, 64, 64, 64, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:39,053 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 21:04:39,251 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,SelfDestructingSolverStorable17 [2022-04-06 21:04:39,251 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:39,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:39,252 INFO L85 PathProgramCache]: Analyzing trace with hash 445814563, now seen corresponding path program 25 times [2022-04-06 21:04:39,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:39,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [517989334] [2022-04-06 21:04:40,113 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:40,273 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:40,273 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:40,273 INFO L85 PathProgramCache]: Analyzing trace with hash 445814563, now seen corresponding path program 26 times [2022-04-06 21:04:40,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:40,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118009565] [2022-04-06 21:04:40,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:40,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:40,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 179355 backedges. 21056 proven. 526 refuted. 0 times theorem prover too weak. 157773 trivial. 0 not checked. [2022-04-06 21:04:40,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:40,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118009565] [2022-04-06 21:04:40,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118009565] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:40,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615874292] [2022-04-06 21:04:40,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:40,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:40,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:40,469 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 21:04:40,469 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 21:04:40,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:40,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:40,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1770 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 21:04:40,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 179355 backedges. 21056 proven. 526 refuted. 0 times theorem prover too weak. 157773 trivial. 0 not checked. [2022-04-06 21:04:41,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 179355 backedges. 21056 proven. 526 refuted. 0 times theorem prover too weak. 157773 trivial. 0 not checked. [2022-04-06 21:04:42,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615874292] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:42,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:42,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-06 21:04:42,935 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:42,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [517989334] [2022-04-06 21:04:42,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [517989334] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:42,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:42,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:04:42,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107305321] [2022-04-06 21:04:42,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:42,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:04:42,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:42,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:04:42,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:42,936 INFO L87 Difference]: Start difference. First operand 1060 states and 1154 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:43,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:43,220 INFO L93 Difference]: Finished difference Result 2513 states and 2744 transitions. [2022-04-06 21:04:43,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:04:43,223 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1059 [2022-04-06 21:04:43,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:43,227 INFO L225 Difference]: With dead ends: 2513 [2022-04-06 21:04:43,227 INFO L226 Difference]: Without dead ends: 1524 [2022-04-06 21:04:43,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2131 GetRequests, 2117 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:04:43,229 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:43,229 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 46 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:43,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2022-04-06 21:04:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1300. [2022-04-06 21:04:43,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1296 states have (on average 1.0856481481481481) internal successors, (1407), 1296 states have internal predecessors, (1407), 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 21:04:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1410 transitions. [2022-04-06 21:04:43,422 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1410 transitions. Word has length 1059 [2022-04-06 21:04:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:43,422 INFO L478 AbstractCegarLoop]: Abstraction has 1300 states and 1410 transitions. [2022-04-06 21:04:43,422 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:43,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1410 transitions. [2022-04-06 21:04:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1300 [2022-04-06 21:04:43,430 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:43,431 INFO L499 BasicCegarLoop]: trace histogram [480, 480, 80, 80, 80, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:43,452 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 21:04:43,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:43,647 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:43,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:43,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1891276835, now seen corresponding path program 27 times [2022-04-06 21:04:43,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:43,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [204062960] [2022-04-06 21:04:44,562 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:44,757 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:44,757 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:44,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1891276835, now seen corresponding path program 28 times [2022-04-06 21:04:44,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:44,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007194332] [2022-04-06 21:04:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:44,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:45,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 279715 backedges. 32831 proven. 875 refuted. 0 times theorem prover too weak. 246009 trivial. 0 not checked. [2022-04-06 21:04:45,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:45,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007194332] [2022-04-06 21:04:45,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007194332] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:45,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122427735] [2022-04-06 21:04:45,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:04:45,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:45,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:45,014 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 21:04:45,064 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 21:04:45,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:04:45,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:45,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:04:45,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 279715 backedges. 32831 proven. 875 refuted. 0 times theorem prover too weak. 246009 trivial. 0 not checked. [2022-04-06 21:04:46,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 279715 backedges. 32831 proven. 875 refuted. 0 times theorem prover too weak. 246009 trivial. 0 not checked. [2022-04-06 21:04:48,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122427735] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:48,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:48,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 10 [2022-04-06 21:04:48,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:48,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [204062960] [2022-04-06 21:04:48,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [204062960] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:48,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:48,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:04:48,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017029311] [2022-04-06 21:04:48,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:48,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:04:48,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:48,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:04:48,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:48,041 INFO L87 Difference]: Start difference. First operand 1300 states and 1410 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 1 states have call successors, (2), 2 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 21:04:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:48,356 INFO L93 Difference]: Finished difference Result 2754 states and 3000 transitions. [2022-04-06 21:04:48,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:04:48,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 1 states have call successors, (2), 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 1299 [2022-04-06 21:04:48,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:48,361 INFO L225 Difference]: With dead ends: 2754 [2022-04-06 21:04:48,361 INFO L226 Difference]: Without dead ends: 1540 [2022-04-06 21:04:48,363 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2613 GetRequests, 2598 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 21:04:48,364 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:48,364 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 41 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:04:48,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2022-04-06 21:04:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1540. [2022-04-06 21:04:48,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1536 states have (on average 1.0826822916666667) internal successors, (1663), 1536 states have internal predecessors, (1663), 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 21:04:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 1666 transitions. [2022-04-06 21:04:48,621 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 1666 transitions. Word has length 1299 [2022-04-06 21:04:48,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:48,621 INFO L478 AbstractCegarLoop]: Abstraction has 1540 states and 1666 transitions. [2022-04-06 21:04:48,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 1 states have call successors, (2), 2 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 21:04:48,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 1666 transitions. [2022-04-06 21:04:48,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1540 [2022-04-06 21:04:48,632 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:48,632 INFO L499 BasicCegarLoop]: trace histogram [576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:48,652 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 21:04:48,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:48,847 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:48,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:48,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2075695395, now seen corresponding path program 29 times [2022-04-06 21:04:48,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:48,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [358547914] [2022-04-06 21:04:50,214 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:50,508 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:50,508 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:50,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2075695395, now seen corresponding path program 30 times [2022-04-06 21:04:50,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:50,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047906491] [2022-04-06 21:04:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:50,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:50,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 402347 backedges. 88169 proven. 3149 refuted. 0 times theorem prover too weak. 311029 trivial. 0 not checked. [2022-04-06 21:04:50,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:50,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047906491] [2022-04-06 21:04:50,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047906491] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:50,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392630552] [2022-04-06 21:04:50,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:04:50,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:50,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:50,858 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 21:04:50,859 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 21:04:51,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 138 check-sat command(s) [2022-04-06 21:04:51,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:51,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:04:51,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 402347 backedges. 214138 proven. 3149 refuted. 0 times theorem prover too weak. 185060 trivial. 0 not checked. [2022-04-06 21:04:52,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 402347 backedges. 214138 proven. 3149 refuted. 0 times theorem prover too weak. 185060 trivial. 0 not checked. [2022-04-06 21:04:54,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392630552] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:54,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:54,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 21:04:54,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:54,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [358547914] [2022-04-06 21:04:54,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [358547914] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:54,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:54,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:04:54,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309781709] [2022-04-06 21:04:54,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:54,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:04:54,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:54,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:04:54,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:54,301 INFO L87 Difference]: Start difference. First operand 1540 states and 1666 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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 21:04:54,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:54,808 INFO L93 Difference]: Finished difference Result 4364 states and 4721 transitions. [2022-04-06 21:04:54,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:04:54,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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 1539 [2022-04-06 21:04:54,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:54,816 INFO L225 Difference]: With dead ends: 4364 [2022-04-06 21:04:54,816 INFO L226 Difference]: Without dead ends: 3020 [2022-04-06 21:04:54,818 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 3087 GetRequests, 3076 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 21:04:54,818 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:54,818 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 36 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:04:54,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3020 states. [2022-04-06 21:04:55,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3020 to 2284. [2022-04-06 21:04:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2280 states have (on average 1.0802631578947368) internal successors, (2463), 2280 states have internal predecessors, (2463), 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 21:04:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 2466 transitions. [2022-04-06 21:04:55,159 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 2466 transitions. Word has length 1539 [2022-04-06 21:04:55,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:55,159 INFO L478 AbstractCegarLoop]: Abstraction has 2284 states and 2466 transitions. [2022-04-06 21:04:55,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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 21:04:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 2466 transitions. [2022-04-06 21:04:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2284 [2022-04-06 21:04:55,179 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:55,180 INFO L499 BasicCegarLoop]: trace histogram [864, 864, 144, 144, 144, 24, 24, 24, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:55,197 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 21:04:55,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:55,395 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:55,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:55,396 INFO L85 PathProgramCache]: Analyzing trace with hash -747363677, now seen corresponding path program 31 times [2022-04-06 21:04:55,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:55,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [190053340] [2022-04-06 21:04:56,831 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:57,414 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:57,414 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:57,414 INFO L85 PathProgramCache]: Analyzing trace with hash -747363677, now seen corresponding path program 32 times [2022-04-06 21:04:57,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:57,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958134129] [2022-04-06 21:04:57,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:57,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:58,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 905559 backedges. 198328 proven. 9444 refuted. 0 times theorem prover too weak. 697787 trivial. 0 not checked. [2022-04-06 21:04:58,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:58,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958134129] [2022-04-06 21:04:58,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958134129] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:58,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154884471] [2022-04-06 21:04:58,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:58,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:58,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:58,307 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:58,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 21:04:58,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:58,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:58,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 3738 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:04:58,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 905559 backedges. 198328 proven. 9444 refuted. 0 times theorem prover too weak. 697787 trivial. 0 not checked. [2022-04-06 21:05:01,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 905559 backedges. 198328 proven. 9444 refuted. 0 times theorem prover too weak. 697787 trivial. 0 not checked. [2022-04-06 21:05:03,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154884471] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:03,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:03,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-06 21:05:03,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:03,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [190053340] [2022-04-06 21:05:03,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [190053340] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:03,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:03,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:05:03,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774615502] [2022-04-06 21:05:03,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:03,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:05:03,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:03,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:05:03,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:05:03,729 INFO L87 Difference]: Start difference. First operand 2284 states and 2466 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 1 states have call successors, (2), 2 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 21:05:04,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:04,434 INFO L93 Difference]: Finished difference Result 5759 states and 6221 transitions. [2022-04-06 21:05:04,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:05:04,436 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 1 states have call successors, (2), 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 2283 [2022-04-06 21:05:04,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:04,448 INFO L225 Difference]: With dead ends: 5759 [2022-04-06 21:05:04,448 INFO L226 Difference]: Without dead ends: 3764 [2022-04-06 21:05:04,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4577 GetRequests, 4564 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 21:05:04,471 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 77 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:04,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 36 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:05:04,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3764 states. [2022-04-06 21:05:04,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3764 to 3028. [2022-04-06 21:05:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3024 states have (on average 1.0790343915343916) internal successors, (3263), 3024 states have internal predecessors, (3263), 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 21:05:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 3266 transitions. [2022-04-06 21:05:04,969 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 3266 transitions. Word has length 2283 [2022-04-06 21:05:04,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:04,969 INFO L478 AbstractCegarLoop]: Abstraction has 3028 states and 3266 transitions. [2022-04-06 21:05:04,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 1 states have call successors, (2), 2 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 21:05:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 3266 transitions. [2022-04-06 21:05:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3028 [2022-04-06 21:05:05,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:05,003 INFO L499 BasicCegarLoop]: trace histogram [1152, 1152, 192, 192, 192, 32, 32, 32, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:05,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 21:05:05,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 21:05:05,219 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:05,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:05,220 INFO L85 PathProgramCache]: Analyzing trace with hash 973302819, now seen corresponding path program 33 times [2022-04-06 21:05:05,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:05,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [455063888] [2022-04-06 21:05:06,724 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:07,849 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:07,849 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:07,849 INFO L85 PathProgramCache]: Analyzing trace with hash 973302819, now seen corresponding path program 34 times [2022-04-06 21:05:07,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:07,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352756716] [2022-04-06 21:05:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:07,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:09,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1610179 backedges. 352545 proven. 18886 refuted. 0 times theorem prover too weak. 1238748 trivial. 0 not checked. [2022-04-06 21:05:09,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:09,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352756716] [2022-04-06 21:05:09,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352756716] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:09,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407544255] [2022-04-06 21:05:09,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:05:09,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:09,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:09,300 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:05:09,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 21:05:09,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:05:09,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:09,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 4915 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 21:05:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1610179 backedges. 352545 proven. 18886 refuted. 0 times theorem prover too weak. 1238748 trivial. 0 not checked. [2022-04-06 21:05:12,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1610179 backedges. 352545 proven. 18886 refuted. 0 times theorem prover too weak. 1238748 trivial. 0 not checked. [2022-04-06 21:05:16,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407544255] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:16,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:16,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-06 21:05:16,382 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:16,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [455063888] [2022-04-06 21:05:16,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [455063888] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:16,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:16,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:05:16,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288439859] [2022-04-06 21:05:16,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:16,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:05:16,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:16,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:05:16,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:05:16,384 INFO L87 Difference]: Start difference. First operand 3028 states and 3266 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 1 states have call successors, (2), 2 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 21:05:17,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:17,174 INFO L93 Difference]: Finished difference Result 7154 states and 7721 transitions. [2022-04-06 21:05:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:05:17,175 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 1 states have call successors, (2), 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 3027 [2022-04-06 21:05:17,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:17,185 INFO L225 Difference]: With dead ends: 7154 [2022-04-06 21:05:17,186 INFO L226 Difference]: Without dead ends: 4508 [2022-04-06 21:05:17,190 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6067 GetRequests, 6053 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:05:17,190 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 91 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:17,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 36 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:05:17,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2022-04-06 21:05:17,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 3772. [2022-04-06 21:05:17,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3772 states, 3768 states have (on average 1.0782908704883227) internal successors, (4063), 3768 states have internal predecessors, (4063), 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 21:05:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3772 states to 3772 states and 4066 transitions. [2022-04-06 21:05:17,774 INFO L78 Accepts]: Start accepts. Automaton has 3772 states and 4066 transitions. Word has length 3027 [2022-04-06 21:05:17,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:17,775 INFO L478 AbstractCegarLoop]: Abstraction has 3772 states and 4066 transitions. [2022-04-06 21:05:17,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 1 states have call successors, (2), 2 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 21:05:17,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3772 states and 4066 transitions. [2022-04-06 21:05:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3772 [2022-04-06 21:05:17,824 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:17,825 INFO L499 BasicCegarLoop]: trace histogram [1440, 1440, 240, 240, 240, 40, 40, 40, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:17,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 21:05:18,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:18,050 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:18,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:18,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1235257949, now seen corresponding path program 35 times [2022-04-06 21:05:18,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:18,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1381436059] [2022-04-06 21:05:19,601 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:21,306 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:21,306 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:21,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1235257949, now seen corresponding path program 36 times [2022-04-06 21:05:21,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:21,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644301846] [2022-04-06 21:05:21,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:21,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:22,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2516207 backedges. 550820 proven. 31475 refuted. 0 times theorem prover too weak. 1933912 trivial. 0 not checked. [2022-04-06 21:05:22,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:22,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644301846] [2022-04-06 21:05:22,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644301846] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:22,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617418045] [2022-04-06 21:05:22,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:05:22,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:22,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:23,000 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:05:23,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 21:05:24,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 379 check-sat command(s) [2022-04-06 21:05:24,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:24,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 2325 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:05:24,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:05:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2516207 backedges. 550831 proven. 31475 refuted. 0 times theorem prover too weak. 1933901 trivial. 0 not checked. [2022-04-06 21:05:27,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:05:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2516207 backedges. 550831 proven. 31475 refuted. 0 times theorem prover too weak. 1933901 trivial. 0 not checked. [2022-04-06 21:05:30,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617418045] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:05:30,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:05:30,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 10 [2022-04-06 21:05:30,922 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:05:30,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1381436059] [2022-04-06 21:05:30,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1381436059] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:05:30,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:05:30,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:05:30,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193714014] [2022-04-06 21:05:30,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:05:30,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:05:30,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:30,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:05:30,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:05:30,924 INFO L87 Difference]: Start difference. First operand 3772 states and 4066 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 states have internal predecessors, (67), 1 states have call successors, (2), 2 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 21:05:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:05:31,728 INFO L93 Difference]: Finished difference Result 7813 states and 8429 transitions. [2022-04-06 21:05:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:05:31,729 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 states have internal predecessors, (67), 1 states have call successors, (2), 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 3771 [2022-04-06 21:05:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:05:31,742 INFO L225 Difference]: With dead ends: 7813 [2022-04-06 21:05:31,742 INFO L226 Difference]: Without dead ends: 4516 [2022-04-06 21:05:31,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7557 GetRequests, 7542 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 21:05:31,748 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 98 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:05:31,749 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 41 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:05:31,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4516 states. [2022-04-06 21:05:32,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4516 to 4516. [2022-04-06 21:05:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4516 states, 4512 states have (on average 1.0777925531914894) internal successors, (4863), 4512 states have internal predecessors, (4863), 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 21:05:32,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 4866 transitions. [2022-04-06 21:05:32,520 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 4866 transitions. Word has length 3771 [2022-04-06 21:05:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:05:32,521 INFO L478 AbstractCegarLoop]: Abstraction has 4516 states and 4866 transitions. [2022-04-06 21:05:32,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 8 states have internal predecessors, (67), 1 states have call successors, (2), 2 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 21:05:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 4866 transitions. [2022-04-06 21:05:32,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4516 [2022-04-06 21:05:32,589 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:05:32,591 INFO L499 BasicCegarLoop]: trace histogram [1728, 1728, 288, 288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:05:32,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 21:05:32,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:32,791 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:05:32,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:05:32,792 INFO L85 PathProgramCache]: Analyzing trace with hash -487309533, now seen corresponding path program 37 times [2022-04-06 21:05:32,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:05:32,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [808460980] [2022-04-06 21:05:47,046 WARN L232 SmtUtils]: Spent 13.91s on a formula simplification. DAG size of input: 1213 DAG size of output: 905 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 21:05:48,418 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:50,767 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:05:50,767 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:05:50,768 INFO L85 PathProgramCache]: Analyzing trace with hash -487309533, now seen corresponding path program 38 times [2022-04-06 21:05:50,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:05:50,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117932825] [2022-04-06 21:05:50,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:05:50,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:05:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:54,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:05:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:05:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3623643 backedges. 1359706 proven. 113309 refuted. 0 times theorem prover too weak. 2150628 trivial. 0 not checked. [2022-04-06 21:05:54,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:05:54,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117932825] [2022-04-06 21:05:54,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117932825] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:05:54,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817519783] [2022-04-06 21:05:54,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:05:54,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:05:54,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:05:54,497 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:05:54,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 21:05:55,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:05:55,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:05:55,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 7338 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:05:55,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3623643 backedges. 1359706 proven. 113309 refuted. 0 times theorem prover too weak. 2150628 trivial. 0 not checked. [2022-04-06 21:06:00,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3623643 backedges. 1359706 proven. 113309 refuted. 0 times theorem prover too weak. 2150628 trivial. 0 not checked. [2022-04-06 21:06:05,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817519783] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:05,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:05,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 21:06:05,699 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:05,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [808460980] [2022-04-06 21:06:05,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [808460980] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:05,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:05,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:06:05,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736944818] [2022-04-06 21:06:05,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:05,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:06:05,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:05,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:06:05,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:06:05,702 INFO L87 Difference]: Start difference. First operand 4516 states and 4866 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:07,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:07,275 INFO L93 Difference]: Finished difference Result 12385 states and 13346 transitions. [2022-04-06 21:06:07,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:06:07,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 4515 [2022-04-06 21:06:07,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:07,297 INFO L225 Difference]: With dead ends: 12385 [2022-04-06 21:06:07,297 INFO L226 Difference]: Without dead ends: 9000 [2022-04-06 21:06:07,303 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9039 GetRequests, 9028 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 21:06:07,303 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:07,304 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 31 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:07,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9000 states. [2022-04-06 21:06:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9000 to 6760. [2022-04-06 21:06:08,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6760 states, 6756 states have (on average 1.0774126702190645) internal successors, (7279), 6756 states have internal predecessors, (7279), 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 21:06:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6760 states to 6760 states and 7282 transitions. [2022-04-06 21:06:08,456 INFO L78 Accepts]: Start accepts. Automaton has 6760 states and 7282 transitions. Word has length 4515 [2022-04-06 21:06:08,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:08,457 INFO L478 AbstractCegarLoop]: Abstraction has 6760 states and 7282 transitions. [2022-04-06 21:06:08,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:06:08,458 INFO L276 IsEmpty]: Start isEmpty. Operand 6760 states and 7282 transitions. [2022-04-06 21:06:08,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6760 [2022-04-06 21:06:08,633 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:08,635 INFO L499 BasicCegarLoop]: trace histogram [2592, 2592, 432, 432, 432, 72, 72, 72, 12, 12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:08,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 21:06:08,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:08,839 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:08,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1939702755, now seen corresponding path program 39 times [2022-04-06 21:06:08,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:08,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [946522682] [2022-04-06 21:06:23,381 WARN L232 SmtUtils]: Spent 14.15s on a formula simplification. DAG size of input: 1213 DAG size of output: 901 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 21:06:25,106 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:30,958 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:30,958 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:30,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1939702755, now seen corresponding path program 40 times [2022-04-06 21:06:30,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:30,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384364909] [2022-04-06 21:06:30,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:30,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:38,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8154817 backedges. 3059317 proven. 339924 refuted. 0 times theorem prover too weak. 4755576 trivial. 0 not checked. [2022-04-06 21:06:38,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:38,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384364909] [2022-04-06 21:06:38,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384364909] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:38,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115794546] [2022-04-06 21:06:38,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:06:38,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:38,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:38,644 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:06:38,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 21:06:40,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:06:40,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:40,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 10939 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:06:40,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8154817 backedges. 3059317 proven. 339924 refuted. 0 times theorem prover too weak. 4755576 trivial. 0 not checked. [2022-04-06 21:06:47,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8154817 backedges. 3059317 proven. 339924 refuted. 0 times theorem prover too weak. 4755576 trivial. 0 not checked. [2022-04-06 21:06:55,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115794546] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:55,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:55,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-06 21:06:55,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:55,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [946522682] [2022-04-06 21:06:55,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [946522682] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:55,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:55,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:06:55,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735693551] [2022-04-06 21:06:55,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:55,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:06:55,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:55,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:06:55,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:06:55,942 INFO L87 Difference]: Start difference. First operand 6760 states and 7282 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 1 states have call successors, (2), 2 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 21:06:57,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:57,861 INFO L93 Difference]: Finished difference Result 16312 states and 17574 transitions. [2022-04-06 21:06:57,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:06:57,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 1 states have call successors, (2), 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 6759 [2022-04-06 21:06:57,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:57,878 INFO L225 Difference]: With dead ends: 16312 [2022-04-06 21:06:57,878 INFO L226 Difference]: Without dead ends: 11244 [2022-04-06 21:06:57,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13529 GetRequests, 13516 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 21:06:57,886 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 101 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:57,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 36 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:06:57,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11244 states. [2022-04-06 21:06:59,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11244 to 9004. [2022-04-06 21:06:59,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9004 states, 9000 states have (on average 1.0772222222222223) internal successors, (9695), 9000 states have internal predecessors, (9695), 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 21:06:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9004 states to 9004 states and 9698 transitions. [2022-04-06 21:06:59,406 INFO L78 Accepts]: Start accepts. Automaton has 9004 states and 9698 transitions. Word has length 6759 [2022-04-06 21:06:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:59,408 INFO L478 AbstractCegarLoop]: Abstraction has 9004 states and 9698 transitions. [2022-04-06 21:06:59,408 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 1 states have call successors, (2), 2 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 21:06:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 9004 states and 9698 transitions. [2022-04-06 21:06:59,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9004 [2022-04-06 21:06:59,689 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:59,691 INFO L499 BasicCegarLoop]: trace histogram [3456, 3456, 576, 576, 576, 96, 96, 96, 16, 16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:59,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 21:06:59,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 21:06:59,891 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:59,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:59,893 INFO L85 PathProgramCache]: Analyzing trace with hash 664886947, now seen corresponding path program 41 times [2022-04-06 21:06:59,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:59,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1103166323] [2022-04-06 21:07:14,180 WARN L232 SmtUtils]: Spent 13.85s on a formula simplification. DAG size of input: 1213 DAG size of output: 908 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 21:07:16,364 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:26,279 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:07:26,279 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:07:26,280 INFO L85 PathProgramCache]: Analyzing trace with hash 664886947, now seen corresponding path program 42 times [2022-04-06 21:07:26,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:07:26,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141000764] [2022-04-06 21:07:26,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:07:26,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:07:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:38,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:07:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:07:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14498903 backedges. 5438770 proven. 679846 refuted. 0 times theorem prover too weak. 8380287 trivial. 0 not checked. [2022-04-06 21:07:38,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:07:38,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141000764] [2022-04-06 21:07:38,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141000764] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:07:38,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102455530] [2022-04-06 21:07:38,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:07:38,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:07:38,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:07:38,778 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:07:38,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 21:07:51,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1129 check-sat command(s) [2022-04-06 21:07:51,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:07:51,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 8118 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 21:07:51,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:08:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 14498903 backedges. 5438774 proven. 679846 refuted. 0 times theorem prover too weak. 8380283 trivial. 0 not checked. [2022-04-06 21:08:01,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:08:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14498903 backedges. 5438774 proven. 679846 refuted. 0 times theorem prover too weak. 8380283 trivial. 0 not checked. [2022-04-06 21:08:09,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102455530] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:08:09,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:08:09,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-06 21:08:09,654 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:08:09,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1103166323] [2022-04-06 21:08:09,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1103166323] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:08:09,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:08:09,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:08:09,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292145635] [2022-04-06 21:08:09,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:08:09,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:08:09,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:09,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:08:09,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:08:09,657 INFO L87 Difference]: Start difference. First operand 9004 states and 9698 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 7 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:12,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:08:12,105 INFO L93 Difference]: Finished difference Result 20239 states and 21802 transitions. [2022-04-06 21:08:12,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:08:12,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 7 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9003 [2022-04-06 21:08:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:08:12,129 INFO L225 Difference]: With dead ends: 20239 [2022-04-06 21:08:12,129 INFO L226 Difference]: Without dead ends: 13488 [2022-04-06 21:08:12,139 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18019 GetRequests, 18005 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 21:08:12,139 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 121 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:08:12,140 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 31 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:08:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13488 states. [2022-04-06 21:08:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13488 to 11248. [2022-04-06 21:08:14,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11248 states, 11244 states have (on average 1.0771077908217717) internal successors, (12111), 11244 states have internal predecessors, (12111), 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 21:08:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11248 states to 11248 states and 12114 transitions. [2022-04-06 21:08:14,162 INFO L78 Accepts]: Start accepts. Automaton has 11248 states and 12114 transitions. Word has length 9003 [2022-04-06 21:08:14,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:08:14,163 INFO L478 AbstractCegarLoop]: Abstraction has 11248 states and 12114 transitions. [2022-04-06 21:08:14,163 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 7 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:08:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 11248 states and 12114 transitions. [2022-04-06 21:08:14,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11248 [2022-04-06 21:08:14,615 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:08:14,618 INFO L499 BasicCegarLoop]: trace histogram [4320, 4320, 720, 720, 720, 120, 120, 120, 20, 20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:08:14,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 21:08:14,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 21:08:14,819 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:08:14,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:08:14,820 INFO L85 PathProgramCache]: Analyzing trace with hash -350498973, now seen corresponding path program 43 times [2022-04-06 21:08:14,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:08:14,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [606835147] [2022-04-06 21:08:28,630 WARN L232 SmtUtils]: Spent 13.32s on a formula simplification. DAG size of input: 1213 DAG size of output: 908 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 21:08:31,306 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:46,862 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:08:46,862 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:08:46,862 INFO L85 PathProgramCache]: Analyzing trace with hash -350498973, now seen corresponding path program 44 times [2022-04-06 21:08:46,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:08:46,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818167838] [2022-04-06 21:08:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:08:46,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:08:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:04,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:09:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:09:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 22655901 backedges. 8498065 proven. 1133075 refuted. 0 times theorem prover too weak. 13024761 trivial. 0 not checked. [2022-04-06 21:09:05,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:09:05,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818167838] [2022-04-06 21:09:05,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818167838] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:09:05,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877513966] [2022-04-06 21:09:05,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:09:05,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:09:05,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:09:05,550 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:09:05,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 21:09:07,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:09:07,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:09:07,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 18210 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:09:08,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:09:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 22655901 backedges. 8498065 proven. 1133075 refuted. 0 times theorem prover too weak. 13024761 trivial. 0 not checked. [2022-04-06 21:09:20,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:09:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 22655901 backedges. 8498065 proven. 1133075 refuted. 0 times theorem prover too weak. 13024761 trivial. 0 not checked. [2022-04-06 21:09:34,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877513966] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:09:34,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:09:34,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 10 [2022-04-06 21:09:34,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:09:34,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [606835147] [2022-04-06 21:09:34,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [606835147] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:09:34,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:09:34,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:09:34,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150097257] [2022-04-06 21:09:34,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:09:34,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:09:34,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:34,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:09:34,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:09:34,631 INFO L87 Difference]: Start difference. First operand 11248 states and 12114 transitions. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 1 states have call successors, (2), 2 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 21:09:37,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:09:37,115 INFO L93 Difference]: Finished difference Result 21926 states and 23618 transitions. [2022-04-06 21:09:37,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:09:37,116 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 1 states have call successors, (2), 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 11247 [2022-04-06 21:09:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:09:37,134 INFO L225 Difference]: With dead ends: 21926 [2022-04-06 21:09:37,134 INFO L226 Difference]: Without dead ends: 13492 [2022-04-06 21:09:37,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22509 GetRequests, 22494 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 21:09:37,145 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 131 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:09:37,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 41 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:09:37,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13492 states. [2022-04-06 21:09:39,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13492 to 13492. [2022-04-06 21:09:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13492 states, 13488 states have (on average 1.0770314353499406) internal successors, (14527), 13488 states have internal predecessors, (14527), 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 21:09:39,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13492 states to 13492 states and 14530 transitions. [2022-04-06 21:09:39,520 INFO L78 Accepts]: Start accepts. Automaton has 13492 states and 14530 transitions. Word has length 11247 [2022-04-06 21:09:39,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:09:39,522 INFO L478 AbstractCegarLoop]: Abstraction has 13492 states and 14530 transitions. [2022-04-06 21:09:39,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 1 states have call successors, (2), 2 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 21:09:39,523 INFO L276 IsEmpty]: Start isEmpty. Operand 13492 states and 14530 transitions. [2022-04-06 21:09:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13492 [2022-04-06 21:09:40,105 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:09:40,108 INFO L499 BasicCegarLoop]: trace histogram [5184, 5184, 864, 864, 864, 144, 144, 144, 24, 24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:09:40,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 21:09:40,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 21:09:40,311 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:09:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:09:40,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1805385251, now seen corresponding path program 45 times [2022-04-06 21:09:40,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:09:40,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [90491133] [2022-04-06 21:09:53,967 WARN L232 SmtUtils]: Spent 13.08s on a formula simplification. DAG size of input: 1213 DAG size of output: 904 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)