/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/loops-crafted-1/in-de32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:31:58,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:31:58,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:31:58,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:31:58,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:31:58,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:31:58,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:31:58,532 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 20:31:58,538 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:31:58,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:31:58,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:31:58,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:31:58,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:31:58,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:31:58,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:31:58,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:31:58,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:31:58,541 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:31:58,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:31:58,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:31:58,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:31:58,541 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:31:58,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:31:58,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:31:58,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:31:58,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:31:58,542 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:31:58,542 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:31:58,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:31:58,542 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:31:58,542 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:31:58,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:31:58,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:31:58,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:31:58,745 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:31:58,746 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:31:58,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de32.c [2022-04-06 20:31:58,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8da89c8f/0e1499fab51943298d97497531a50035/FLAGf212f4a81 [2022-04-06 20:31:59,099 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:31:59,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de32.c [2022-04-06 20:31:59,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8da89c8f/0e1499fab51943298d97497531a50035/FLAGf212f4a81 [2022-04-06 20:31:59,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8da89c8f/0e1499fab51943298d97497531a50035 [2022-04-06 20:31:59,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:31:59,524 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:31:59,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:31:59,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:31:59,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:31:59,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:31:59" (1/1) ... [2022-04-06 20:31:59,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2de0ccfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:31:59, skipping insertion in model container [2022-04-06 20:31:59,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:31:59" (1/1) ... [2022-04-06 20:31:59,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:31:59,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:31:59,706 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de32.c[368,381] [2022-04-06 20:31:59,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:31:59,728 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:31:59,735 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de32.c[368,381] [2022-04-06 20:31:59,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:31:59,746 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:31:59,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:31:59 WrapperNode [2022-04-06 20:31:59,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:31:59,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:31:59,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:31:59,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:31:59,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:31:59" (1/1) ... [2022-04-06 20:31:59,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:31:59" (1/1) ... [2022-04-06 20:31:59,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:31:59" (1/1) ... [2022-04-06 20:31:59,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:31:59" (1/1) ... [2022-04-06 20:31:59,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:31:59" (1/1) ... [2022-04-06 20:31:59,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:31:59" (1/1) ... [2022-04-06 20:31:59,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:31:59" (1/1) ... [2022-04-06 20:31:59,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:31:59,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:31:59,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:31:59,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:31:59,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:31:59" (1/1) ... [2022-04-06 20:31:59,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:31:59,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:59,798 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 20:31:59,841 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 20:31:59,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:31:59,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:31:59,856 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:31:59,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:31:59,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:31:59,856 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:31:59,856 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:31:59,857 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:31:59,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:31:59,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 20:31:59,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:31:59,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:31:59,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:31:59,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:31:59,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:31:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:31:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:31:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:31:59,906 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:31:59,907 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:32:00,013 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:32:00,016 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:32:00,016 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 20:32:00,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:32:00 BoogieIcfgContainer [2022-04-06 20:32:00,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:32:00,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:32:00,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:32:00,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:32:00,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:31:59" (1/3) ... [2022-04-06 20:32:00,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3feb72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:32:00, skipping insertion in model container [2022-04-06 20:32:00,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:31:59" (2/3) ... [2022-04-06 20:32:00,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3feb72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:32:00, skipping insertion in model container [2022-04-06 20:32:00,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:32:00" (3/3) ... [2022-04-06 20:32:00,034 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de32.c [2022-04-06 20:32:00,037 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:32:00,037 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:32:00,062 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:32:00,066 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 20:32:00,067 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:32:00,074 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:32:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 20:32:00,079 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:00,079 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:00,079 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:00,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:00,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1792812365, now seen corresponding path program 1 times [2022-04-06 20:32:00,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:00,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1847621617] [2022-04-06 20:32:00,094 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:32:00,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1792812365, now seen corresponding path program 2 times [2022-04-06 20:32:00,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:00,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145215900] [2022-04-06 20:32:00,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:00,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:00,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:00,281 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 20:32:00,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:00,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145215900] [2022-04-06 20:32:00,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145215900] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:00,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:00,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:32:00,284 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:00,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1847621617] [2022-04-06 20:32:00,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1847621617] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:00,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:00,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:32:00,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784277758] [2022-04-06 20:32:00,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:00,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:32:00,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:00,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:32:00,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:32:00,307 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:00,400 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-04-06 20:32:00,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:32:00,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 20:32:00,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:00,426 INFO L225 Difference]: With dead ends: 47 [2022-04-06 20:32:00,426 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 20:32:00,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:32:00,432 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:00,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:32:00,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 20:32:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 20:32:00,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-04-06 20:32:00,473 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2022-04-06 20:32:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:00,473 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-04-06 20:32:00,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:00,474 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-04-06 20:32:00,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 20:32:00,475 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:00,475 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:00,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:32:00,476 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:00,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:00,477 INFO L85 PathProgramCache]: Analyzing trace with hash -222896448, now seen corresponding path program 1 times [2022-04-06 20:32:00,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:00,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2009536192] [2022-04-06 20:32:00,480 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:00,480 INFO L85 PathProgramCache]: Analyzing trace with hash -222896448, now seen corresponding path program 2 times [2022-04-06 20:32:00,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:00,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287174084] [2022-04-06 20:32:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:00,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:00,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:00,556 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 20:32:00,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:00,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287174084] [2022-04-06 20:32:00,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287174084] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:00,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:00,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:32:00,557 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:00,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2009536192] [2022-04-06 20:32:00,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2009536192] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:00,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:00,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:32:00,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23035271] [2022-04-06 20:32:00,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:00,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:32:00,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:00,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:32:00,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:32:00,559 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:00,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:00,600 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2022-04-06 20:32:00,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:32:00,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 20:32:00,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:00,602 INFO L225 Difference]: With dead ends: 30 [2022-04-06 20:32:00,602 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 20:32:00,602 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:32:00,603 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:00,604 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:32:00,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 20:32:00,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-04-06 20:32:00,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:00,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-04-06 20:32:00,609 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 15 [2022-04-06 20:32:00,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:00,609 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-04-06 20:32:00,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-04-06 20:32:00,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 20:32:00,610 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:00,610 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:00,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:32:00,610 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:00,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:00,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1179931951, now seen corresponding path program 1 times [2022-04-06 20:32:00,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:00,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [122743193] [2022-04-06 20:32:00,626 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:00,626 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:00,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1179931951, now seen corresponding path program 2 times [2022-04-06 20:32:00,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:00,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959314976] [2022-04-06 20:32:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:00,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:00,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:00,692 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 20:32:00,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:00,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959314976] [2022-04-06 20:32:00,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959314976] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:00,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:00,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:32:00,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:00,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [122743193] [2022-04-06 20:32:00,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [122743193] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:00,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:00,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:32:00,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244690201] [2022-04-06 20:32:00,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:00,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:32:00,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:00,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:32:00,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:32:00,695 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:00,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:00,768 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-04-06 20:32:00,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:32:00,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 20:32:00,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:00,769 INFO L225 Difference]: With dead ends: 27 [2022-04-06 20:32:00,769 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 20:32:00,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:32:00,771 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:00,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 27 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:00,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 20:32:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-06 20:32:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-04-06 20:32:00,775 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2022-04-06 20:32:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:00,776 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-04-06 20:32:00,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-04-06 20:32:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 20:32:00,776 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:00,776 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:00,777 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 20:32:00,777 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:00,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1314021247, now seen corresponding path program 1 times [2022-04-06 20:32:00,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:00,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1500723454] [2022-04-06 20:32:00,779 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:00,779 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:00,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1314021247, now seen corresponding path program 2 times [2022-04-06 20:32:00,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:00,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220405569] [2022-04-06 20:32:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:00,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:00,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:32:00,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:00,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220405569] [2022-04-06 20:32:00,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220405569] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:00,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926687499] [2022-04-06 20:32:00,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:00,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:00,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:00,865 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 20:32:00,865 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 20:32:00,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:00,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:00,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:32:00,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:32:00,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:32:01,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926687499] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:01,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:32:01,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 9 [2022-04-06 20:32:01,046 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:01,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1500723454] [2022-04-06 20:32:01,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1500723454] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:01,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:01,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:32:01,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596860436] [2022-04-06 20:32:01,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:01,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:32:01,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:01,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:32:01,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:32:01,050 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:01,068 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-04-06 20:32:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:32:01,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-04-06 20:32:01,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:01,070 INFO L225 Difference]: With dead ends: 24 [2022-04-06 20:32:01,070 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 20:32:01,070 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:32:01,074 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:01,074 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 35 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:32:01,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 20:32:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 20:32:01,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-06 20:32:01,085 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2022-04-06 20:32:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:01,089 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-06 20:32:01,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-06 20:32:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 20:32:01,089 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:01,089 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:01,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 20:32:01,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:01,308 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:01,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:01,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1578117650, now seen corresponding path program 1 times [2022-04-06 20:32:01,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:01,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1956168676] [2022-04-06 20:32:01,310 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:01,310 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:01,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1578117650, now seen corresponding path program 2 times [2022-04-06 20:32:01,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:01,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961994006] [2022-04-06 20:32:01,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:01,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:01,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:32:01,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:01,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961994006] [2022-04-06 20:32:01,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961994006] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:01,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513158477] [2022-04-06 20:32:01,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:01,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:01,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:01,362 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 20:32:01,363 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 20:32:01,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:01,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:01,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:32:01,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:01,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:32:01,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513158477] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:01,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:32:01,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 9 [2022-04-06 20:32:01,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:01,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1956168676] [2022-04-06 20:32:01,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1956168676] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:01,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:01,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:32:01,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580607868] [2022-04-06 20:32:01,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:01,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:32:01,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:01,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:32:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:32:01,469 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:01,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:01,477 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-04-06 20:32:01,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:32:01,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-04-06 20:32:01,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:01,478 INFO L225 Difference]: With dead ends: 23 [2022-04-06 20:32:01,478 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 20:32:01,478 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:32:01,478 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:01,478 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:32:01,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 20:32:01,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-06 20:32:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:01,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-04-06 20:32:01,494 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 16 [2022-04-06 20:32:01,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:01,494 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-04-06 20:32:01,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:01,494 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-04-06 20:32:01,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:32:01,494 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:01,494 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:01,512 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 20:32:01,710 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:01,710 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:01,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:01,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1642511809, now seen corresponding path program 1 times [2022-04-06 20:32:01,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:01,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [432736004] [2022-04-06 20:32:01,712 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:01,712 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:01,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1642511809, now seen corresponding path program 2 times [2022-04-06 20:32:01,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:01,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098991666] [2022-04-06 20:32:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:01,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:01,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:32:01,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:01,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098991666] [2022-04-06 20:32:01,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098991666] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:01,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687289704] [2022-04-06 20:32:01,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:01,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:01,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:01,819 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 20:32:01,834 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 20:32:01,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:01,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:01,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:32:01,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:32:01,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:32:01,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687289704] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:01,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:01,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-04-06 20:32:01,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:01,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [432736004] [2022-04-06 20:32:01,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [432736004] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:01,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:01,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:32:01,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143848613] [2022-04-06 20:32:01,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:01,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:32:01,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:01,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:32:01,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:32:01,976 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:02,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:02,041 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-04-06 20:32:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:32:02,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 20:32:02,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:02,041 INFO L225 Difference]: With dead ends: 26 [2022-04-06 20:32:02,041 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 20:32:02,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:32:02,042 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:02,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:32:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 20:32:02,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-04-06 20:32:02,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-04-06 20:32:02,048 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2022-04-06 20:32:02,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:02,048 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-04-06 20:32:02,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:02,048 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-04-06 20:32:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 20:32:02,048 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:02,048 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:02,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 20:32:02,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:02,264 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:02,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash 656236558, now seen corresponding path program 3 times [2022-04-06 20:32:02,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:02,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1500360193] [2022-04-06 20:32:02,266 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:02,266 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:02,266 INFO L85 PathProgramCache]: Analyzing trace with hash 656236558, now seen corresponding path program 4 times [2022-04-06 20:32:02,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:02,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654028421] [2022-04-06 20:32:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:02,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:02,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:32:02,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:02,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654028421] [2022-04-06 20:32:02,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654028421] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:02,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833647625] [2022-04-06 20:32:02,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:02,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:02,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:02,333 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 20:32:02,338 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 20:32:02,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:02,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:02,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:32:02,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:02,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:32:02,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833647625] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:02,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:02,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-04-06 20:32:02,513 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:02,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1500360193] [2022-04-06 20:32:02,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1500360193] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:02,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:02,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:32:02,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548493652] [2022-04-06 20:32:02,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:02,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:32:02,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:02,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:32:02,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:32:02,514 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:02,562 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-04-06 20:32:02,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:32:02,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-04-06 20:32:02,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:02,563 INFO L225 Difference]: With dead ends: 36 [2022-04-06 20:32:02,563 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 20:32:02,563 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:32:02,564 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:02,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 25 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:32:02,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 20:32:02,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-04-06 20:32:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-04-06 20:32:02,569 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 18 [2022-04-06 20:32:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:02,569 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-04-06 20:32:02,569 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-04-06 20:32:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 20:32:02,569 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:02,569 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:02,586 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 20:32:02,786 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:02,786 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:02,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:02,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1194243967, now seen corresponding path program 5 times [2022-04-06 20:32:02,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:02,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [693343733] [2022-04-06 20:32:02,788 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:02,788 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:02,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1194243967, now seen corresponding path program 6 times [2022-04-06 20:32:02,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:02,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116340925] [2022-04-06 20:32:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:02,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:02,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:32:02,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:02,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116340925] [2022-04-06 20:32:02,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116340925] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:02,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663362949] [2022-04-06 20:32:02,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:02,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:02,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:02,838 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 20:32:02,839 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 20:32:02,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-06 20:32:02,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:02,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:32:02,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:32:02,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:32:03,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663362949] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:03,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:03,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-04-06 20:32:03,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:03,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [693343733] [2022-04-06 20:32:03,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [693343733] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:03,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:03,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:32:03,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660164751] [2022-04-06 20:32:03,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:03,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:32:03,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:03,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:32:03,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:32:03,052 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:03,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:03,135 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-04-06 20:32:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:32:03,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-04-06 20:32:03,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:03,138 INFO L225 Difference]: With dead ends: 32 [2022-04-06 20:32:03,138 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 20:32:03,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:32:03,138 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:03,139 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:32:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 20:32:03,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-04-06 20:32:03,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:03,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-04-06 20:32:03,142 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2022-04-06 20:32:03,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:03,142 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-04-06 20:32:03,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:03,142 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-04-06 20:32:03,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 20:32:03,142 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:03,143 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:03,160 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 20:32:03,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:03,343 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:03,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:03,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1675054353, now seen corresponding path program 7 times [2022-04-06 20:32:03,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:03,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [93653983] [2022-04-06 20:32:03,345 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:03,345 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:03,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1675054353, now seen corresponding path program 8 times [2022-04-06 20:32:03,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:03,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598211976] [2022-04-06 20:32:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:03,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:03,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:03,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:03,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598211976] [2022-04-06 20:32:03,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598211976] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:03,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117581720] [2022-04-06 20:32:03,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:03,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:03,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:03,427 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 20:32:03,453 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 20:32:03,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:03,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:03,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:32:03,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:03,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:03,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117581720] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:03,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:03,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 14 [2022-04-06 20:32:03,613 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:03,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [93653983] [2022-04-06 20:32:03,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [93653983] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:03,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:03,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:32:03,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080348555] [2022-04-06 20:32:03,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:03,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:32:03,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:03,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:32:03,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:32:03,614 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:03,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:03,708 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-04-06 20:32:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:32:03,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 20:32:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:03,709 INFO L225 Difference]: With dead ends: 38 [2022-04-06 20:32:03,709 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 20:32:03,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:32:03,709 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:03,710 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 34 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:32:03,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 20:32:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-04-06 20:32:03,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:03,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-04-06 20:32:03,714 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 19 [2022-04-06 20:32:03,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:03,714 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-04-06 20:32:03,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:03,714 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-04-06 20:32:03,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:32:03,714 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:03,714 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:03,745 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 20:32:03,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:03,928 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:03,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:03,929 INFO L85 PathProgramCache]: Analyzing trace with hash -854221811, now seen corresponding path program 9 times [2022-04-06 20:32:03,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:03,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [139648552] [2022-04-06 20:32:03,930 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:03,930 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:03,930 INFO L85 PathProgramCache]: Analyzing trace with hash -854221811, now seen corresponding path program 10 times [2022-04-06 20:32:03,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:03,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616017045] [2022-04-06 20:32:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:03,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:03,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:04,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:04,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616017045] [2022-04-06 20:32:04,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616017045] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:04,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800767492] [2022-04-06 20:32:04,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:04,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:04,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:04,007 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 20:32:04,008 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 20:32:04,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:04,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:04,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:32:04,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:04,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:04,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800767492] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:04,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:04,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-06 20:32:04,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:04,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [139648552] [2022-04-06 20:32:04,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [139648552] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:04,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:04,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:32:04,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618634167] [2022-04-06 20:32:04,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:04,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:32:04,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:04,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:32:04,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:32:04,222 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:04,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:04,310 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2022-04-06 20:32:04,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:32:04,310 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 20:32:04,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:04,313 INFO L225 Difference]: With dead ends: 44 [2022-04-06 20:32:04,313 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 20:32:04,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:32:04,314 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:04,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 44 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:32:04,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 20:32:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-04-06 20:32:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:04,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-04-06 20:32:04,327 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2022-04-06 20:32:04,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:04,327 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-04-06 20:32:04,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:04,327 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-04-06 20:32:04,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:32:04,328 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:04,328 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:04,346 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 20:32:04,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:04,539 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:04,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:04,540 INFO L85 PathProgramCache]: Analyzing trace with hash -930628562, now seen corresponding path program 11 times [2022-04-06 20:32:04,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:04,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [28422684] [2022-04-06 20:32:04,541 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:04,541 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:04,541 INFO L85 PathProgramCache]: Analyzing trace with hash -930628562, now seen corresponding path program 12 times [2022-04-06 20:32:04,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:04,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298712433] [2022-04-06 20:32:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:04,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:04,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:04,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:04,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298712433] [2022-04-06 20:32:04,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298712433] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:04,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221669436] [2022-04-06 20:32:04,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:04,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:04,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:04,660 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 20:32:04,661 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 20:32:04,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:32:04,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:04,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:32:04,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:04,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:32:04,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221669436] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:04,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:04,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 15 [2022-04-06 20:32:04,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:04,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [28422684] [2022-04-06 20:32:04,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [28422684] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:04,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:04,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:32:04,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759860894] [2022-04-06 20:32:04,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:04,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:32:04,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:04,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:32:04,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:32:04,911 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:05,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:05,065 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-04-06 20:32:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:32:05,065 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 20:32:05,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:05,066 INFO L225 Difference]: With dead ends: 55 [2022-04-06 20:32:05,066 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 20:32:05,066 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:32:05,066 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:05,067 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 41 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 20:32:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2022-04-06 20:32:05,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2022-04-06 20:32:05,074 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 20 [2022-04-06 20:32:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:05,074 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-04-06 20:32:05,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2022-04-06 20:32:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:32:05,074 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:05,074 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:05,093 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 20:32:05,291 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,SelfDestructingSolverStorable10 [2022-04-06 20:32:05,292 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:05,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1178216785, now seen corresponding path program 13 times [2022-04-06 20:32:05,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:05,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [353588230] [2022-04-06 20:32:05,293 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:05,293 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:05,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1178216785, now seen corresponding path program 14 times [2022-04-06 20:32:05,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:05,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627788035] [2022-04-06 20:32:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:05,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:05,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:05,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:05,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627788035] [2022-04-06 20:32:05,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627788035] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:05,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983200715] [2022-04-06 20:32:05,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:05,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:05,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:05,389 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 20:32:05,390 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 20:32:05,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:05,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:05,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:32:05,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:05,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:05,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983200715] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:05,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:05,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-04-06 20:32:05,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:05,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [353588230] [2022-04-06 20:32:05,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [353588230] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:05,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:05,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:32:05,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774283932] [2022-04-06 20:32:05,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:05,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:32:05,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:05,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:32:05,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:32:05,601 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:05,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:05,700 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-04-06 20:32:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:32:05,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 20:32:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:05,700 INFO L225 Difference]: With dead ends: 47 [2022-04-06 20:32:05,700 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 20:32:05,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:32:05,701 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:05,701 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 46 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:32:05,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 20:32:05,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 20:32:05,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:05,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-04-06 20:32:05,706 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2022-04-06 20:32:05,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:05,706 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-04-06 20:32:05,706 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:05,706 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-04-06 20:32:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:32:05,706 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:05,706 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:05,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-06 20:32:05,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:05,915 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:05,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:05,916 INFO L85 PathProgramCache]: Analyzing trace with hash 671734479, now seen corresponding path program 15 times [2022-04-06 20:32:05,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:05,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [616534919] [2022-04-06 20:32:05,917 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:05,917 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:05,917 INFO L85 PathProgramCache]: Analyzing trace with hash 671734479, now seen corresponding path program 16 times [2022-04-06 20:32:05,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:05,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165819372] [2022-04-06 20:32:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:05,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:05,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:06,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:06,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165819372] [2022-04-06 20:32:06,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165819372] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:06,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336658468] [2022-04-06 20:32:06,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:06,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:06,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:06,016 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 20:32:06,018 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 20:32:06,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:06,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:06,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:32:06,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:06,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:32:06,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336658468] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:06,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:06,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 16 [2022-04-06 20:32:06,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:06,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [616534919] [2022-04-06 20:32:06,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [616534919] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:06,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:06,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:32:06,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875975464] [2022-04-06 20:32:06,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:06,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:32:06,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:06,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:32:06,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:32:06,269 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:06,425 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-04-06 20:32:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:32:06,425 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 20:32:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:06,426 INFO L225 Difference]: With dead ends: 57 [2022-04-06 20:32:06,426 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 20:32:06,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:32:06,426 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:06,427 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 46 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:06,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 20:32:06,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2022-04-06 20:32:06,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-04-06 20:32:06,433 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 21 [2022-04-06 20:32:06,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:06,433 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-04-06 20:32:06,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-04-06 20:32:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 20:32:06,434 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:06,434 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:06,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-06 20:32:06,647 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,SelfDestructingSolverStorable12 [2022-04-06 20:32:06,647 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:06,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1752036735, now seen corresponding path program 17 times [2022-04-06 20:32:06,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:06,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [28349107] [2022-04-06 20:32:06,649 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:06,649 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:06,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1752036735, now seen corresponding path program 18 times [2022-04-06 20:32:06,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:06,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747020092] [2022-04-06 20:32:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:06,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:06,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:32:06,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:06,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747020092] [2022-04-06 20:32:06,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747020092] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:06,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774236651] [2022-04-06 20:32:06,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:06,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:06,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:06,719 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 20:32:06,720 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 20:32:06,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:32:06,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:06,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:32:06,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:32:06,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:32:06,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774236651] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:06,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:06,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 19 [2022-04-06 20:32:06,949 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:06,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [28349107] [2022-04-06 20:32:06,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [28349107] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:06,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:06,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:32:06,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634390362] [2022-04-06 20:32:06,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:06,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:32:06,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:06,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:32:06,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:32:06,950 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:07,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:07,085 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-04-06 20:32:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:32:07,085 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 20:32:07,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:07,086 INFO L225 Difference]: With dead ends: 55 [2022-04-06 20:32:07,086 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 20:32:07,086 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:32:07,087 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:07,087 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 46 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:07,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 20:32:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2022-04-06 20:32:07,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-04-06 20:32:07,094 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2022-04-06 20:32:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:07,094 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-04-06 20:32:07,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:07,094 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-04-06 20:32:07,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 20:32:07,095 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:07,095 INFO L499 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:07,112 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 20:32:07,307 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,SelfDestructingSolverStorable13 [2022-04-06 20:32:07,307 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:07,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:07,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1194618802, now seen corresponding path program 19 times [2022-04-06 20:32:07,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:07,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2062636860] [2022-04-06 20:32:07,309 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:07,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:07,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1194618802, now seen corresponding path program 20 times [2022-04-06 20:32:07,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:07,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245429084] [2022-04-06 20:32:07,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:07,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:07,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:07,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:07,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245429084] [2022-04-06 20:32:07,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245429084] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:07,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193886003] [2022-04-06 20:32:07,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:07,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:07,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:07,421 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 20:32:07,428 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 20:32:07,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:07,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:07,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:32:07,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:07,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:07,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193886003] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:07,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:07,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 20:32:07,685 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:07,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2062636860] [2022-04-06 20:32:07,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2062636860] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:07,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:07,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:32:07,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822228815] [2022-04-06 20:32:07,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:07,685 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:32:07,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:07,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:32:07,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:32:07,686 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:07,900 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2022-04-06 20:32:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:32:07,901 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 20:32:07,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:07,901 INFO L225 Difference]: With dead ends: 65 [2022-04-06 20:32:07,901 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 20:32:07,902 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:32:07,902 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:07,902 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 59 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:07,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 20:32:07,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2022-04-06 20:32:07,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2022-04-06 20:32:07,908 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 22 [2022-04-06 20:32:07,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:07,909 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2022-04-06 20:32:07,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:07,909 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2022-04-06 20:32:07,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:32:07,909 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:07,909 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:07,930 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 20:32:08,125 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,SelfDestructingSolverStorable14 [2022-04-06 20:32:08,126 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:08,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:08,126 INFO L85 PathProgramCache]: Analyzing trace with hash 142103551, now seen corresponding path program 21 times [2022-04-06 20:32:08,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:08,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2012651877] [2022-04-06 20:32:08,127 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:08,127 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:08,127 INFO L85 PathProgramCache]: Analyzing trace with hash 142103551, now seen corresponding path program 22 times [2022-04-06 20:32:08,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:08,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496292974] [2022-04-06 20:32:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:08,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:08,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:32:08,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:08,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496292974] [2022-04-06 20:32:08,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496292974] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:08,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291077383] [2022-04-06 20:32:08,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:08,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:08,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:08,197 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 20:32:08,198 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 20:32:08,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:08,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:08,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:32:08,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:32:08,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:32:08,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291077383] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:08,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:08,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-04-06 20:32:08,350 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:08,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2012651877] [2022-04-06 20:32:08,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2012651877] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:08,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:08,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:32:08,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483463884] [2022-04-06 20:32:08,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:08,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:32:08,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:08,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:32:08,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:32:08,351 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:08,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:08,472 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2022-04-06 20:32:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:32:08,473 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 20:32:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:08,473 INFO L225 Difference]: With dead ends: 80 [2022-04-06 20:32:08,473 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 20:32:08,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:32:08,474 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:08,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 52 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 20:32:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2022-04-06 20:32:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-04-06 20:32:08,482 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 23 [2022-04-06 20:32:08,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:08,482 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-04-06 20:32:08,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:08,482 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-04-06 20:32:08,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:32:08,483 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:08,483 INFO L499 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:08,514 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 20:32:08,698 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 20:32:08,699 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:08,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:08,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1077971631, now seen corresponding path program 23 times [2022-04-06 20:32:08,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:08,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [945353043] [2022-04-06 20:32:08,700 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:08,700 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:08,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1077971631, now seen corresponding path program 24 times [2022-04-06 20:32:08,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:08,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465097321] [2022-04-06 20:32:08,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:08,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:08,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:08,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:08,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465097321] [2022-04-06 20:32:08,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465097321] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:08,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250588724] [2022-04-06 20:32:08,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:08,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:08,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:08,816 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 20:32:08,830 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 20:32:08,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:32:08,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:08,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:32:08,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:08,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:09,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250588724] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:09,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:09,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 18 [2022-04-06 20:32:09,007 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:09,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [945353043] [2022-04-06 20:32:09,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [945353043] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:09,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:09,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:32:09,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637071683] [2022-04-06 20:32:09,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:09,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:32:09,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:09,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:32:09,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:32:09,008 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:09,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:09,266 INFO L93 Difference]: Finished difference Result 81 states and 108 transitions. [2022-04-06 20:32:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:32:09,266 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 20:32:09,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:09,266 INFO L225 Difference]: With dead ends: 81 [2022-04-06 20:32:09,266 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 20:32:09,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:32:09,267 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:09,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 67 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:09,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 20:32:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2022-04-06 20:32:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2022-04-06 20:32:09,277 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 23 [2022-04-06 20:32:09,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:09,277 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2022-04-06 20:32:09,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2022-04-06 20:32:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:32:09,278 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:09,278 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:09,297 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 20:32:09,494 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:09,494 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:09,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1773782399, now seen corresponding path program 25 times [2022-04-06 20:32:09,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:09,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [733700773] [2022-04-06 20:32:09,495 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:09,495 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:09,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1773782399, now seen corresponding path program 26 times [2022-04-06 20:32:09,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:09,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792725905] [2022-04-06 20:32:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:09,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:09,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:32:09,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:09,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792725905] [2022-04-06 20:32:09,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792725905] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:09,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834274179] [2022-04-06 20:32:09,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:09,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:09,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:09,584 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 20:32:09,585 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 20:32:09,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:09,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:09,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:32:09,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:32:09,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:32:09,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834274179] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:09,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:09,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-04-06 20:32:09,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:09,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [733700773] [2022-04-06 20:32:09,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [733700773] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:09,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:09,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:32:09,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276894600] [2022-04-06 20:32:09,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:09,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:32:09,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:09,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:32:09,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:32:09,884 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:10,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:10,044 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2022-04-06 20:32:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:32:10,045 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 20:32:10,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:10,045 INFO L225 Difference]: With dead ends: 66 [2022-04-06 20:32:10,045 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 20:32:10,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:32:10,046 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:10,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 56 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:10,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 20:32:10,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-04-06 20:32:10,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-04-06 20:32:10,054 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 24 [2022-04-06 20:32:10,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:10,054 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-04-06 20:32:10,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-04-06 20:32:10,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:32:10,054 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:10,055 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:10,079 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 20:32:10,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 20:32:10,287 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:10,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:10,288 INFO L85 PathProgramCache]: Analyzing trace with hash 243885709, now seen corresponding path program 27 times [2022-04-06 20:32:10,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:10,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [37942731] [2022-04-06 20:32:10,289 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:10,289 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:10,289 INFO L85 PathProgramCache]: Analyzing trace with hash 243885709, now seen corresponding path program 28 times [2022-04-06 20:32:10,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:10,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447722844] [2022-04-06 20:32:10,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:10,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:10,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:32:10,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:10,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447722844] [2022-04-06 20:32:10,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447722844] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:10,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788733907] [2022-04-06 20:32:10,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:10,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:10,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:10,378 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 20:32:10,394 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 20:32:10,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:10,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:10,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:32:10,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:32:10,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 20:32:10,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788733907] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:10,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:10,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2022-04-06 20:32:10,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:10,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [37942731] [2022-04-06 20:32:10,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [37942731] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:10,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:10,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:32:10,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895321651] [2022-04-06 20:32:10,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:10,636 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:32:10,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:10,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:32:10,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:32:10,637 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:10,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:10,792 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2022-04-06 20:32:10,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:32:10,793 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 20:32:10,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:10,793 INFO L225 Difference]: With dead ends: 68 [2022-04-06 20:32:10,793 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 20:32:10,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:32:10,794 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:10,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 46 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 20:32:10,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-04-06 20:32:10,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:10,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2022-04-06 20:32:10,800 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 24 [2022-04-06 20:32:10,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:10,800 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2022-04-06 20:32:10,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:10,800 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2022-04-06 20:32:10,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:32:10,801 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:10,801 INFO L499 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:10,817 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 20:32:11,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:11,012 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:11,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:11,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1486168978, now seen corresponding path program 29 times [2022-04-06 20:32:11,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:11,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1721443689] [2022-04-06 20:32:11,013 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:11,013 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:11,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1486168978, now seen corresponding path program 30 times [2022-04-06 20:32:11,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:11,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189438967] [2022-04-06 20:32:11,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:11,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:11,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:11,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:11,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189438967] [2022-04-06 20:32:11,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189438967] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:11,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023999427] [2022-04-06 20:32:11,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:11,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:11,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:11,136 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 20:32:11,138 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 20:32:11,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:32:11,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:11,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:32:11,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:11,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:11,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023999427] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:11,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:11,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2022-04-06 20:32:11,306 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:11,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1721443689] [2022-04-06 20:32:11,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1721443689] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:11,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:11,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:32:11,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435881414] [2022-04-06 20:32:11,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:11,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:32:11,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:11,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:32:11,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:32:11,307 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:11,575 INFO L93 Difference]: Finished difference Result 83 states and 111 transitions. [2022-04-06 20:32:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:32:11,576 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 20:32:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:11,577 INFO L225 Difference]: With dead ends: 83 [2022-04-06 20:32:11,577 INFO L226 Difference]: Without dead ends: 75 [2022-04-06 20:32:11,577 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:32:11,579 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:11,579 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 67 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:11,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-06 20:32:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2022-04-06 20:32:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2022-04-06 20:32:11,595 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 24 [2022-04-06 20:32:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:11,595 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2022-04-06 20:32:11,595 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:11,595 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2022-04-06 20:32:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:32:11,595 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:11,595 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:11,626 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 20:32:11,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:11,812 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:11,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:11,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2034209681, now seen corresponding path program 31 times [2022-04-06 20:32:11,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:11,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [676893065] [2022-04-06 20:32:11,813 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:11,813 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:11,813 INFO L85 PathProgramCache]: Analyzing trace with hash -2034209681, now seen corresponding path program 32 times [2022-04-06 20:32:11,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:11,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688136619] [2022-04-06 20:32:11,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:11,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:11,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:32:11,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:11,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688136619] [2022-04-06 20:32:11,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688136619] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:11,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699085484] [2022-04-06 20:32:11,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:11,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:11,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:11,921 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 20:32:11,922 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 20:32:11,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:11,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:11,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:32:11,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:32:12,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:32:12,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699085484] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:12,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:12,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-04-06 20:32:12,164 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:12,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [676893065] [2022-04-06 20:32:12,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [676893065] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:12,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:12,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:32:12,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500175904] [2022-04-06 20:32:12,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:12,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:32:12,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:12,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:32:12,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:32:12,165 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:12,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:12,341 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-04-06 20:32:12,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:32:12,341 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 20:32:12,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:12,342 INFO L225 Difference]: With dead ends: 75 [2022-04-06 20:32:12,342 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 20:32:12,342 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:32:12,343 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:12,343 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 63 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:12,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 20:32:12,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2022-04-06 20:32:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 54 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:12,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-04-06 20:32:12,349 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 25 [2022-04-06 20:32:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:12,350 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-04-06 20:32:12,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:12,350 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-04-06 20:32:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:32:12,350 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:12,350 INFO L499 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:12,366 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 20:32:12,566 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:12,566 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:12,567 INFO L85 PathProgramCache]: Analyzing trace with hash 629850767, now seen corresponding path program 33 times [2022-04-06 20:32:12,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:12,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1734691014] [2022-04-06 20:32:12,568 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:12,568 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:12,568 INFO L85 PathProgramCache]: Analyzing trace with hash 629850767, now seen corresponding path program 34 times [2022-04-06 20:32:12,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:12,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88725499] [2022-04-06 20:32:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:12,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:12,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:12,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:12,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88725499] [2022-04-06 20:32:12,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88725499] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:12,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402387800] [2022-04-06 20:32:12,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:12,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:12,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:12,742 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 20:32:12,745 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 20:32:12,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:12,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:12,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:32:12,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:12,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:13,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402387800] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:13,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:13,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 20:32:13,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:13,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1734691014] [2022-04-06 20:32:13,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1734691014] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:13,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:13,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:32:13,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5944827] [2022-04-06 20:32:13,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:13,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:32:13,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:13,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:32:13,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:32:13,065 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:13,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:13,354 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2022-04-06 20:32:13,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:32:13,355 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 20:32:13,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:13,355 INFO L225 Difference]: With dead ends: 91 [2022-04-06 20:32:13,355 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 20:32:13,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:32:13,356 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:13,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 80 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:32:13,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 20:32:13,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2022-04-06 20:32:13,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.3) internal successors, (78), 60 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2022-04-06 20:32:13,364 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 25 [2022-04-06 20:32:13,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:13,364 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2022-04-06 20:32:13,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2022-04-06 20:32:13,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:32:13,365 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:13,365 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:13,381 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 20:32:13,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:13,579 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:13,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:13,580 INFO L85 PathProgramCache]: Analyzing trace with hash 359277261, now seen corresponding path program 35 times [2022-04-06 20:32:13,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:13,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2130895579] [2022-04-06 20:32:13,580 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:13,581 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:13,581 INFO L85 PathProgramCache]: Analyzing trace with hash 359277261, now seen corresponding path program 36 times [2022-04-06 20:32:13,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:13,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022924500] [2022-04-06 20:32:13,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:13,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:13,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:32:13,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:13,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022924500] [2022-04-06 20:32:13,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022924500] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:13,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380015175] [2022-04-06 20:32:13,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:13,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:13,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:13,706 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 20:32:13,707 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 20:32:13,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:32:13,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:13,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:32:13,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:32:13,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:32:13,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380015175] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:13,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:13,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2022-04-06 20:32:13,882 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:13,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2130895579] [2022-04-06 20:32:13,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2130895579] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:13,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:13,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:32:13,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237065705] [2022-04-06 20:32:13,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:13,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:32:13,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:13,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:32:13,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:32:13,892 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:14,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:14,073 INFO L93 Difference]: Finished difference Result 125 states and 159 transitions. [2022-04-06 20:32:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:32:14,073 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 20:32:14,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:14,074 INFO L225 Difference]: With dead ends: 125 [2022-04-06 20:32:14,074 INFO L226 Difference]: Without dead ends: 115 [2022-04-06 20:32:14,074 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:32:14,075 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:14,075 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 60 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:14,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-06 20:32:14,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 69. [2022-04-06 20:32:14,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.3125) internal successors, (84), 64 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:14,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2022-04-06 20:32:14,086 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 26 [2022-04-06 20:32:14,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:14,086 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2022-04-06 20:32:14,086 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:14,087 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2022-04-06 20:32:14,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:32:14,087 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:14,087 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:14,107 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 20:32:14,298 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,SelfDestructingSolverStorable22 [2022-04-06 20:32:14,300 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:14,300 INFO L85 PathProgramCache]: Analyzing trace with hash 177120127, now seen corresponding path program 37 times [2022-04-06 20:32:14,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:14,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1131140541] [2022-04-06 20:32:14,301 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:14,301 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:14,301 INFO L85 PathProgramCache]: Analyzing trace with hash 177120127, now seen corresponding path program 38 times [2022-04-06 20:32:14,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:14,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382550908] [2022-04-06 20:32:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:14,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:14,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:32:14,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:14,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382550908] [2022-04-06 20:32:14,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382550908] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:14,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768052757] [2022-04-06 20:32:14,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:14,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:14,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:14,435 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 20:32:14,445 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 20:32:14,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:14,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:14,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:32:14,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:32:14,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 20:32:14,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768052757] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:14,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:14,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 21 [2022-04-06 20:32:14,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:14,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1131140541] [2022-04-06 20:32:14,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1131140541] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:14,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:14,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:32:14,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691484963] [2022-04-06 20:32:14,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:14,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:32:14,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:14,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:32:14,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:32:14,679 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:14,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:14,933 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2022-04-06 20:32:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:32:14,933 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 20:32:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:14,933 INFO L225 Difference]: With dead ends: 88 [2022-04-06 20:32:14,933 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 20:32:14,934 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:32:14,934 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:14,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 63 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:14,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 20:32:14,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-04-06 20:32:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 65 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2022-04-06 20:32:14,944 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 26 [2022-04-06 20:32:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:14,944 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2022-04-06 20:32:14,944 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2022-04-06 20:32:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:32:14,944 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:14,944 INFO L499 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:14,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-06 20:32:15,160 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,SelfDestructingSolverStorable23 [2022-04-06 20:32:15,161 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:15,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:15,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1801953422, now seen corresponding path program 39 times [2022-04-06 20:32:15,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:15,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1536742403] [2022-04-06 20:32:15,162 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:15,162 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:15,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1801953422, now seen corresponding path program 40 times [2022-04-06 20:32:15,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:15,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564201157] [2022-04-06 20:32:15,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:15,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:15,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:15,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:15,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564201157] [2022-04-06 20:32:15,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564201157] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:15,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926785054] [2022-04-06 20:32:15,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:15,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:15,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:15,299 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 20:32:15,308 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 20:32:15,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:15,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:15,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:32:15,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:15,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:15,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926785054] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:15,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:15,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:32:15,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:15,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1536742403] [2022-04-06 20:32:15,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1536742403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:15,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:15,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:32:15,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75841196] [2022-04-06 20:32:15,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:15,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:32:15,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:15,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:32:15,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:32:15,603 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:15,928 INFO L93 Difference]: Finished difference Result 109 states and 149 transitions. [2022-04-06 20:32:15,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:32:15,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 20:32:15,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:15,929 INFO L225 Difference]: With dead ends: 109 [2022-04-06 20:32:15,929 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 20:32:15,930 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=1287, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:32:15,930 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:15,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 83 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:32:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 20:32:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 76. [2022-04-06 20:32:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.3098591549295775) internal successors, (93), 71 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:15,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2022-04-06 20:32:15,944 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 26 [2022-04-06 20:32:15,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:15,944 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2022-04-06 20:32:15,944 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2022-04-06 20:32:15,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:32:15,944 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:15,944 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:15,961 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 20:32:16,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:16,163 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:16,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:16,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1542928431, now seen corresponding path program 41 times [2022-04-06 20:32:16,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:16,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1770864940] [2022-04-06 20:32:16,164 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:16,165 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:16,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1542928431, now seen corresponding path program 42 times [2022-04-06 20:32:16,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:16,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431943243] [2022-04-06 20:32:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:16,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:16,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:32:16,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:16,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431943243] [2022-04-06 20:32:16,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431943243] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:16,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007794895] [2022-04-06 20:32:16,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:16,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:16,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:16,334 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:16,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 20:32:16,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:32:16,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:16,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:32:16,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:32:16,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:32:16,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007794895] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:16,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:16,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-04-06 20:32:16,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:16,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1770864940] [2022-04-06 20:32:16,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1770864940] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:16,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:16,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:32:16,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041240887] [2022-04-06 20:32:16,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:16,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:32:16,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:16,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:32:16,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:32:16,753 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:16,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:16,878 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2022-04-06 20:32:16,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:32:16,878 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 20:32:16,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:16,878 INFO L225 Difference]: With dead ends: 86 [2022-04-06 20:32:16,878 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 20:32:16,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:32:16,879 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:16,879 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 66 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:32:16,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 20:32:16,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-04-06 20:32:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.3125) internal successors, (84), 64 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2022-04-06 20:32:16,893 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 27 [2022-04-06 20:32:16,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:16,894 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2022-04-06 20:32:16,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:16,894 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2022-04-06 20:32:16,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:32:16,894 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:16,895 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:16,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:17,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:17,095 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:17,096 INFO L85 PathProgramCache]: Analyzing trace with hash -921018945, now seen corresponding path program 43 times [2022-04-06 20:32:17,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:17,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2001024091] [2022-04-06 20:32:17,096 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:17,096 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:17,097 INFO L85 PathProgramCache]: Analyzing trace with hash -921018945, now seen corresponding path program 44 times [2022-04-06 20:32:17,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:17,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268466053] [2022-04-06 20:32:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:17,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:17,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:32:17,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:17,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268466053] [2022-04-06 20:32:17,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268466053] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:17,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478760805] [2022-04-06 20:32:17,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:17,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:17,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:17,209 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:17,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 20:32:17,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:17,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:17,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:32:17,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:32:17,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:32:17,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478760805] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:17,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:17,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 25 [2022-04-06 20:32:17,516 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:17,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2001024091] [2022-04-06 20:32:17,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2001024091] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:17,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:17,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:32:17,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198118569] [2022-04-06 20:32:17,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:17,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:32:17,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:17,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:32:17,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:32:17,517 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:17,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:17,722 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2022-04-06 20:32:17,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:32:17,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 20:32:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:17,722 INFO L225 Difference]: With dead ends: 88 [2022-04-06 20:32:17,723 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 20:32:17,723 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:32:17,723 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:17,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 63 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:17,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 20:32:17,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-04-06 20:32:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 65 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2022-04-06 20:32:17,732 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 27 [2022-04-06 20:32:17,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:17,732 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2022-04-06 20:32:17,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:17,732 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2022-04-06 20:32:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:32:17,732 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:17,732 INFO L499 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:17,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:17,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 20:32:17,948 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:17,948 INFO L85 PathProgramCache]: Analyzing trace with hash -517569937, now seen corresponding path program 45 times [2022-04-06 20:32:17,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:17,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [232689067] [2022-04-06 20:32:17,949 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:17,949 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:17,949 INFO L85 PathProgramCache]: Analyzing trace with hash -517569937, now seen corresponding path program 46 times [2022-04-06 20:32:17,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:17,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858134015] [2022-04-06 20:32:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:17,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:18,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:18,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:18,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858134015] [2022-04-06 20:32:18,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858134015] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:18,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471148971] [2022-04-06 20:32:18,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:18,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:18,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:18,106 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:18,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 20:32:18,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:18,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:18,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 20:32:18,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:18,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:18,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471148971] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:18,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:18,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 20:32:18,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:18,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [232689067] [2022-04-06 20:32:18,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [232689067] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:18,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:18,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:32:18,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174845154] [2022-04-06 20:32:18,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:18,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:32:18,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:18,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:32:18,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:32:18,467 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:18,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:18,841 INFO L93 Difference]: Finished difference Result 110 states and 151 transitions. [2022-04-06 20:32:18,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:32:18,842 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 20:32:18,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:18,842 INFO L225 Difference]: With dead ends: 110 [2022-04-06 20:32:18,842 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 20:32:18,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:32:18,843 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:18,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 93 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:32:18,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 20:32:18,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2022-04-06 20:32:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.3098591549295775) internal successors, (93), 71 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2022-04-06 20:32:18,854 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 27 [2022-04-06 20:32:18,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:18,854 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2022-04-06 20:32:18,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:18,855 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2022-04-06 20:32:18,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:32:18,855 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:18,855 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:18,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:19,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 20:32:19,068 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:19,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:19,068 INFO L85 PathProgramCache]: Analyzing trace with hash -603591809, now seen corresponding path program 47 times [2022-04-06 20:32:19,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:19,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [603631217] [2022-04-06 20:32:19,069 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:19,069 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:19,069 INFO L85 PathProgramCache]: Analyzing trace with hash -603591809, now seen corresponding path program 48 times [2022-04-06 20:32:19,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:19,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328619303] [2022-04-06 20:32:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:19,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:19,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:32:19,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:19,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328619303] [2022-04-06 20:32:19,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328619303] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:19,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157572712] [2022-04-06 20:32:19,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:19,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:19,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:19,183 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:19,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 20:32:19,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:32:19,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:19,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:32:19,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:32:19,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:32:19,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157572712] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:19,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:19,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 29 [2022-04-06 20:32:19,541 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:19,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [603631217] [2022-04-06 20:32:19,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [603631217] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:19,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:19,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:32:19,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780926412] [2022-04-06 20:32:19,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:19,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:32:19,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:19,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:32:19,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:32:19,542 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:19,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:19,712 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2022-04-06 20:32:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:32:19,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 20:32:19,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:19,713 INFO L225 Difference]: With dead ends: 95 [2022-04-06 20:32:19,713 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 20:32:19,714 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=1339, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:32:19,714 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:19,714 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 58 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 20:32:19,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2022-04-06 20:32:19,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 72 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2022-04-06 20:32:19,723 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 28 [2022-04-06 20:32:19,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:19,724 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2022-04-06 20:32:19,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2022-04-06 20:32:19,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:32:19,726 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:19,726 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:19,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:19,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 20:32:19,939 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:19,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1955495667, now seen corresponding path program 49 times [2022-04-06 20:32:19,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:19,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1291943682] [2022-04-06 20:32:19,940 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:19,940 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1955495667, now seen corresponding path program 50 times [2022-04-06 20:32:19,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:19,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443243107] [2022-04-06 20:32:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:19,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:20,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:20,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:20,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443243107] [2022-04-06 20:32:20,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443243107] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:20,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520446051] [2022-04-06 20:32:20,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:20,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:20,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:20,047 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:20,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 20:32:20,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:20,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:20,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 20:32:20,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:20,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:20,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520446051] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:20,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:20,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 20:32:20,252 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:20,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1291943682] [2022-04-06 20:32:20,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1291943682] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:20,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:20,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:32:20,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931430414] [2022-04-06 20:32:20,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:20,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:32:20,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:20,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:32:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:32:20,253 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:20,458 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2022-04-06 20:32:20,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:32:20,458 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 20:32:20,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:20,459 INFO L225 Difference]: With dead ends: 98 [2022-04-06 20:32:20,459 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 20:32:20,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:32:20,459 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:20,460 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 58 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:20,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 20:32:20,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2022-04-06 20:32:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 73 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2022-04-06 20:32:20,469 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 28 [2022-04-06 20:32:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:20,469 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2022-04-06 20:32:20,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:20,469 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2022-04-06 20:32:20,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:32:20,470 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:20,470 INFO L499 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:20,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:20,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:20,675 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:20,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:20,676 INFO L85 PathProgramCache]: Analyzing trace with hash 591649966, now seen corresponding path program 51 times [2022-04-06 20:32:20,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:20,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1028026227] [2022-04-06 20:32:20,676 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:20,676 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:20,677 INFO L85 PathProgramCache]: Analyzing trace with hash 591649966, now seen corresponding path program 52 times [2022-04-06 20:32:20,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:20,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085460008] [2022-04-06 20:32:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:20,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:20,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:20,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:20,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085460008] [2022-04-06 20:32:20,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085460008] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:20,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652213381] [2022-04-06 20:32:20,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:20,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:20,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:20,816 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:20,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 20:32:20,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:20,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:20,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:32:20,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:20,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:21,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652213381] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:21,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:21,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 20:32:21,133 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:21,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1028026227] [2022-04-06 20:32:21,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1028026227] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:21,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:21,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:32:21,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678570310] [2022-04-06 20:32:21,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:21,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:32:21,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:21,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:32:21,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:32:21,134 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:21,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:21,452 INFO L93 Difference]: Finished difference Result 119 states and 163 transitions. [2022-04-06 20:32:21,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:32:21,453 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 20:32:21,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:21,453 INFO L225 Difference]: With dead ends: 119 [2022-04-06 20:32:21,453 INFO L226 Difference]: Without dead ends: 111 [2022-04-06 20:32:21,454 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=463, Invalid=1699, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:32:21,454 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 67 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:21,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 96 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:32:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-04-06 20:32:21,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2022-04-06 20:32:21,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 79 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:21,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-04-06 20:32:21,468 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 28 [2022-04-06 20:32:21,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:21,468 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-04-06 20:32:21,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-04-06 20:32:21,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:32:21,470 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:21,470 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:21,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:21,686 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:21,686 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:21,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:21,687 INFO L85 PathProgramCache]: Analyzing trace with hash 646714815, now seen corresponding path program 53 times [2022-04-06 20:32:21,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:21,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1464278093] [2022-04-06 20:32:21,688 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:21,688 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:21,688 INFO L85 PathProgramCache]: Analyzing trace with hash 646714815, now seen corresponding path program 54 times [2022-04-06 20:32:21,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:21,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575205217] [2022-04-06 20:32:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:21,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:21,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:32:21,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:21,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575205217] [2022-04-06 20:32:21,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575205217] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:21,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182772898] [2022-04-06 20:32:21,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:21,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:21,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:21,777 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:21,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 20:32:21,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:32:21,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:21,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:32:21,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:32:21,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:32:21,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182772898] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:21,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:21,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 13 [2022-04-06 20:32:21,951 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:21,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1464278093] [2022-04-06 20:32:21,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1464278093] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:21,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:21,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:32:21,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651884101] [2022-04-06 20:32:21,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:21,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:32:21,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:21,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:32:21,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:32:21,952 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:22,182 INFO L93 Difference]: Finished difference Result 179 states and 231 transitions. [2022-04-06 20:32:22,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:32:22,184 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 20:32:22,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:22,186 INFO L225 Difference]: With dead ends: 179 [2022-04-06 20:32:22,186 INFO L226 Difference]: Without dead ends: 168 [2022-04-06 20:32:22,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:32:22,186 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:22,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 68 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:22,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-04-06 20:32:22,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 88. [2022-04-06 20:32:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 83 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:22,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2022-04-06 20:32:22,199 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 29 [2022-04-06 20:32:22,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:22,199 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2022-04-06 20:32:22,199 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:22,199 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2022-04-06 20:32:22,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:32:22,199 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:22,199 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:22,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:22,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:22,401 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:22,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:22,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1573757487, now seen corresponding path program 55 times [2022-04-06 20:32:22,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:22,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1390256869] [2022-04-06 20:32:22,402 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:22,402 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:22,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1573757487, now seen corresponding path program 56 times [2022-04-06 20:32:22,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:22,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142231271] [2022-04-06 20:32:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:22,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:22,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:22,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:22,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142231271] [2022-04-06 20:32:22,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142231271] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:22,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171690725] [2022-04-06 20:32:22,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:22,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:22,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:22,518 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:22,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 20:32:22,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:22,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:22,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:32:22,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:22,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 20:32:22,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171690725] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:22,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:22,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 26 [2022-04-06 20:32:22,779 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:22,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1390256869] [2022-04-06 20:32:22,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1390256869] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:22,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:22,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:32:22,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617101070] [2022-04-06 20:32:22,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:22,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:32:22,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:22,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:32:22,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:32:22,780 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:23,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:23,092 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2022-04-06 20:32:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:32:23,093 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 20:32:23,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:23,093 INFO L225 Difference]: With dead ends: 109 [2022-04-06 20:32:23,093 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 20:32:23,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:32:23,094 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:23,094 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 60 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:23,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 20:32:23,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2022-04-06 20:32:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 84 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:23,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2022-04-06 20:32:23,107 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 29 [2022-04-06 20:32:23,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:23,107 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2022-04-06 20:32:23,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:23,107 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2022-04-06 20:32:23,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:32:23,108 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:23,108 INFO L499 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:23,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-04-06 20:32:23,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-04-06 20:32:23,321 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:23,321 INFO L85 PathProgramCache]: Analyzing trace with hash 617728591, now seen corresponding path program 57 times [2022-04-06 20:32:23,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:23,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1032885392] [2022-04-06 20:32:23,322 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:23,322 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:23,322 INFO L85 PathProgramCache]: Analyzing trace with hash 617728591, now seen corresponding path program 58 times [2022-04-06 20:32:23,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:23,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118784331] [2022-04-06 20:32:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:23,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:23,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:23,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:23,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118784331] [2022-04-06 20:32:23,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118784331] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:23,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646573690] [2022-04-06 20:32:23,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:23,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:23,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:23,533 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:23,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 20:32:23,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:23,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:23,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:32:23,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:23,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:23,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646573690] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:23,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:23,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:32:23,979 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:23,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1032885392] [2022-04-06 20:32:23,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1032885392] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:23,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:23,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:32:23,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593829905] [2022-04-06 20:32:23,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:23,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:32:23,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:23,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:32:23,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:32:23,980 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:24,435 INFO L93 Difference]: Finished difference Result 138 states and 192 transitions. [2022-04-06 20:32:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:32:24,435 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 20:32:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:24,436 INFO L225 Difference]: With dead ends: 138 [2022-04-06 20:32:24,436 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 20:32:24,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1926, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:32:24,437 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 75 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:24,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 109 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:32:24,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 20:32:24,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 95. [2022-04-06 20:32:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.3111111111111111) internal successors, (118), 90 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:24,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 122 transitions. [2022-04-06 20:32:24,454 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 122 transitions. Word has length 29 [2022-04-06 20:32:24,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:24,454 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 122 transitions. [2022-04-06 20:32:24,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:24,454 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 122 transitions. [2022-04-06 20:32:24,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:32:24,454 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:24,454 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:24,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:24,670 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:24,670 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:24,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:24,671 INFO L85 PathProgramCache]: Analyzing trace with hash 751514495, now seen corresponding path program 59 times [2022-04-06 20:32:24,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:24,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [472520126] [2022-04-06 20:32:24,671 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:24,671 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:24,671 INFO L85 PathProgramCache]: Analyzing trace with hash 751514495, now seen corresponding path program 60 times [2022-04-06 20:32:24,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:24,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445840595] [2022-04-06 20:32:24,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:24,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:24,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:32:24,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:24,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445840595] [2022-04-06 20:32:24,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445840595] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:24,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428190868] [2022-04-06 20:32:24,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:24,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:24,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:24,807 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:24,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 20:32:24,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:32:24,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:24,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:32:24,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:32:25,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:32:25,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428190868] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:25,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:25,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 33 [2022-04-06 20:32:25,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:25,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [472520126] [2022-04-06 20:32:25,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [472520126] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:25,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:25,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:32:25,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562258428] [2022-04-06 20:32:25,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:25,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:32:25,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:25,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:32:25,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:32:25,279 INFO L87 Difference]: Start difference. First operand 95 states and 122 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:25,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:25,448 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2022-04-06 20:32:25,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:32:25,448 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 20:32:25,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:25,449 INFO L225 Difference]: With dead ends: 106 [2022-04-06 20:32:25,449 INFO L226 Difference]: Without dead ends: 87 [2022-04-06 20:32:25,450 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=345, Invalid=1635, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:32:25,450 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:25,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 76 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-06 20:32:25,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-04-06 20:32:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.3170731707317074) internal successors, (108), 82 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:25,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2022-04-06 20:32:25,464 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 30 [2022-04-06 20:32:25,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:25,465 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2022-04-06 20:32:25,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:25,465 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2022-04-06 20:32:25,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:32:25,465 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:25,465 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:25,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-04-06 20:32:25,673 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:25,673 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:25,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:25,673 INFO L85 PathProgramCache]: Analyzing trace with hash -688544435, now seen corresponding path program 61 times [2022-04-06 20:32:25,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:25,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1963135523] [2022-04-06 20:32:25,674 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:25,674 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:25,674 INFO L85 PathProgramCache]: Analyzing trace with hash -688544435, now seen corresponding path program 62 times [2022-04-06 20:32:25,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:25,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809598699] [2022-04-06 20:32:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:25,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:25,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:25,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:25,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809598699] [2022-04-06 20:32:25,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809598699] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:25,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983894831] [2022-04-06 20:32:25,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:25,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:25,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:25,814 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:25,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 20:32:25,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:25,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:25,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:32:25,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:26,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:32:26,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983894831] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:26,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:26,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 12] total 30 [2022-04-06 20:32:26,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:26,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1963135523] [2022-04-06 20:32:26,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1963135523] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:26,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:26,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:32:26,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958859115] [2022-04-06 20:32:26,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:26,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:32:26,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:26,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:32:26,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:32:26,240 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:26,520 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2022-04-06 20:32:26,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:32:26,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 20:32:26,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:26,521 INFO L225 Difference]: With dead ends: 108 [2022-04-06 20:32:26,521 INFO L226 Difference]: Without dead ends: 96 [2022-04-06 20:32:26,521 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=1490, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:32:26,522 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:26,522 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 58 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:26,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-06 20:32:26,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2022-04-06 20:32:26,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 83 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2022-04-06 20:32:26,534 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 30 [2022-04-06 20:32:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:26,534 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2022-04-06 20:32:26,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2022-04-06 20:32:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:32:26,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:26,535 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:26,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:26,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 20:32:26,751 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:26,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:26,751 INFO L85 PathProgramCache]: Analyzing trace with hash 352108927, now seen corresponding path program 63 times [2022-04-06 20:32:26,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:26,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1712920176] [2022-04-06 20:32:26,752 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:26,752 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:26,752 INFO L85 PathProgramCache]: Analyzing trace with hash 352108927, now seen corresponding path program 64 times [2022-04-06 20:32:26,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:26,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477368267] [2022-04-06 20:32:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:26,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:26,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:26,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:26,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477368267] [2022-04-06 20:32:26,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477368267] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:26,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752550248] [2022-04-06 20:32:26,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:26,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:26,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:26,878 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:26,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 20:32:26,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:26,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:26,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:32:26,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:26,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:27,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752550248] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:27,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:27,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 20:32:27,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:27,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1712920176] [2022-04-06 20:32:27,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1712920176] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:27,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:27,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:32:27,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768815219] [2022-04-06 20:32:27,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:27,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:32:27,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:27,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:32:27,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:32:27,208 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:27,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:27,422 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2022-04-06 20:32:27,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:32:27,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 20:32:27,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:27,423 INFO L225 Difference]: With dead ends: 111 [2022-04-06 20:32:27,423 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 20:32:27,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=1173, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:32:27,426 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:27,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 68 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:27,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 20:32:27,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-04-06 20:32:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 84 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:27,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2022-04-06 20:32:27,440 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 30 [2022-04-06 20:32:27,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:27,440 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2022-04-06 20:32:27,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:27,440 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2022-04-06 20:32:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:32:27,441 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:27,441 INFO L499 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:27,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:27,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 20:32:27,657 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:27,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:27,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1426165966, now seen corresponding path program 65 times [2022-04-06 20:32:27,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:27,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [506296193] [2022-04-06 20:32:27,658 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:27,658 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:27,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1426165966, now seen corresponding path program 66 times [2022-04-06 20:32:27,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:27,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448880557] [2022-04-06 20:32:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:27,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:27,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:27,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:27,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448880557] [2022-04-06 20:32:27,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448880557] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:27,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548971837] [2022-04-06 20:32:27,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:27,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:27,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:27,870 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:27,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 20:32:27,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:32:27,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:27,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:32:27,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:27,979 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:32:27,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:32:28,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548971837] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:28,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:28,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 6] total 25 [2022-04-06 20:32:28,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:28,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [506296193] [2022-04-06 20:32:28,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [506296193] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:28,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:28,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:32:28,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173905115] [2022-04-06 20:32:28,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:28,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:32:28,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:28,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:32:28,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:32:28,058 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:28,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:28,637 INFO L93 Difference]: Finished difference Result 139 states and 194 transitions. [2022-04-06 20:32:28,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:32:28,638 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 20:32:28,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:28,638 INFO L225 Difference]: With dead ends: 139 [2022-04-06 20:32:28,638 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 20:32:28,639 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:32:28,639 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 75 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:28,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 109 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:32:28,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 20:32:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 95. [2022-04-06 20:32:28,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.3111111111111111) internal successors, (118), 90 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 122 transitions. [2022-04-06 20:32:28,654 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 122 transitions. Word has length 30 [2022-04-06 20:32:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:28,654 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 122 transitions. [2022-04-06 20:32:28,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 122 transitions. [2022-04-06 20:32:28,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:32:28,654 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:28,654 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:28,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:28,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-06 20:32:28,867 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:28,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:28,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2100427281, now seen corresponding path program 67 times [2022-04-06 20:32:28,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:28,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1260456439] [2022-04-06 20:32:28,868 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:28,868 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:28,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2100427281, now seen corresponding path program 68 times [2022-04-06 20:32:28,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:28,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370303337] [2022-04-06 20:32:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:28,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:29,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:29,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:29,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370303337] [2022-04-06 20:32:29,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370303337] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:29,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646398060] [2022-04-06 20:32:29,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:29,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:29,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:29,013 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:29,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 20:32:29,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:29,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:29,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:32:29,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:29,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:29,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646398060] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:29,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:29,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 34 [2022-04-06 20:32:29,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:29,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1260456439] [2022-04-06 20:32:29,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1260456439] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:29,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:29,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:32:29,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208121728] [2022-04-06 20:32:29,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:29,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:32:29,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:32:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:32:29,415 INFO L87 Difference]: Start difference. First operand 95 states and 122 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:29,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:29,652 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2022-04-06 20:32:29,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:32:29,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 20:32:29,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:29,653 INFO L225 Difference]: With dead ends: 116 [2022-04-06 20:32:29,653 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 20:32:29,654 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:32:29,654 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:29,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 58 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 20:32:29,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2022-04-06 20:32:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.3076923076923077) internal successors, (119), 91 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2022-04-06 20:32:29,670 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 31 [2022-04-06 20:32:29,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:29,670 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2022-04-06 20:32:29,670 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:29,670 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2022-04-06 20:32:29,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:32:29,670 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:29,670 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:29,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:29,886 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 20:32:29,886 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:29,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:29,886 INFO L85 PathProgramCache]: Analyzing trace with hash 868091775, now seen corresponding path program 69 times [2022-04-06 20:32:29,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:29,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [380944460] [2022-04-06 20:32:29,887 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:29,887 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:29,887 INFO L85 PathProgramCache]: Analyzing trace with hash 868091775, now seen corresponding path program 70 times [2022-04-06 20:32:29,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:29,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414689649] [2022-04-06 20:32:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:29,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:30,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:30,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:30,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414689649] [2022-04-06 20:32:30,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414689649] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:30,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135768486] [2022-04-06 20:32:30,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:30,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:30,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:30,027 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:30,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 20:32:30,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:30,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:30,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:32:30,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:30,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:30,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135768486] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:30,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:30,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:32:30,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:30,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [380944460] [2022-04-06 20:32:30,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [380944460] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:30,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:30,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:32:30,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243853672] [2022-04-06 20:32:30,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:30,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:32:30,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:30,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:32:30,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:32:30,371 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:30,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:30,670 INFO L93 Difference]: Finished difference Result 119 states and 146 transitions. [2022-04-06 20:32:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:32:30,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 20:32:30,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:30,671 INFO L225 Difference]: With dead ends: 119 [2022-04-06 20:32:30,671 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 20:32:30,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=1441, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:32:30,672 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:30,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 70 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 20:32:30,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2022-04-06 20:32:30,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.3043478260869565) internal successors, (120), 92 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2022-04-06 20:32:30,692 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 31 [2022-04-06 20:32:30,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:30,692 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2022-04-06 20:32:30,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:30,692 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2022-04-06 20:32:30,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:32:30,693 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:30,693 INFO L499 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:30,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:30,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 20:32:30,909 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:30,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:30,910 INFO L85 PathProgramCache]: Analyzing trace with hash 717920815, now seen corresponding path program 71 times [2022-04-06 20:32:30,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:30,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1415607289] [2022-04-06 20:32:30,911 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:30,911 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:30,911 INFO L85 PathProgramCache]: Analyzing trace with hash 717920815, now seen corresponding path program 72 times [2022-04-06 20:32:30,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:30,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513040286] [2022-04-06 20:32:30,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:30,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:31,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:31,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:31,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513040286] [2022-04-06 20:32:31,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513040286] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:31,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652476302] [2022-04-06 20:32:31,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:31,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:31,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:31,148 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:31,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 20:32:31,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:32:31,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:31,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:32:31,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:32:31,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:32:31,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652476302] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:31,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:31,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6, 6] total 26 [2022-04-06 20:32:31,366 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:31,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1415607289] [2022-04-06 20:32:31,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1415607289] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:31,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:31,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:32:31,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740756689] [2022-04-06 20:32:31,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:31,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:32:31,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:31,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:32:31,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:32:31,367 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:32,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:32,061 INFO L93 Difference]: Finished difference Result 148 states and 206 transitions. [2022-04-06 20:32:32,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:32:32,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 20:32:32,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:32,061 INFO L225 Difference]: With dead ends: 148 [2022-04-06 20:32:32,062 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 20:32:32,062 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=1739, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:32:32,062 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 83 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:32,062 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 122 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:32:32,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 20:32:32,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 103. [2022-04-06 20:32:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.3061224489795917) internal successors, (128), 98 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:32,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2022-04-06 20:32:32,080 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 31 [2022-04-06 20:32:32,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:32,081 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2022-04-06 20:32:32,081 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:32,081 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2022-04-06 20:32:32,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:32:32,081 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:32,081 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:32,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:32,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-04-06 20:32:32,288 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1375844749, now seen corresponding path program 73 times [2022-04-06 20:32:32,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:32,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [748263764] [2022-04-06 20:32:32,289 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:32,289 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:32,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1375844749, now seen corresponding path program 74 times [2022-04-06 20:32:32,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:32,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694359055] [2022-04-06 20:32:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:32,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:32,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:32,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:32,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694359055] [2022-04-06 20:32:32,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694359055] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:32,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125672264] [2022-04-06 20:32:32,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:32,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:32,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:32,393 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:32,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 20:32:32,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:32,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:32,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:32:32,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:32,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:32,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125672264] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:32,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:32,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 14 [2022-04-06 20:32:32,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:32,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [748263764] [2022-04-06 20:32:32,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [748263764] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:32,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:32,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:32:32,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035273949] [2022-04-06 20:32:32,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:32,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:32:32,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:32,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:32:32,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:32:32,577 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:32,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:32,879 INFO L93 Difference]: Finished difference Result 242 states and 316 transitions. [2022-04-06 20:32:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:32:32,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 20:32:32,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:32,881 INFO L225 Difference]: With dead ends: 242 [2022-04-06 20:32:32,881 INFO L226 Difference]: Without dead ends: 230 [2022-04-06 20:32:32,881 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:32:32,882 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:32,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 76 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:32:32,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-06 20:32:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 107. [2022-04-06 20:32:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 102 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 138 transitions. [2022-04-06 20:32:32,899 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 138 transitions. Word has length 32 [2022-04-06 20:32:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:32,899 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 138 transitions. [2022-04-06 20:32:32,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:32,900 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 138 transitions. [2022-04-06 20:32:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:32:32,900 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:32,900 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:32,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:33,106 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 20:32:33,106 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:33,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:33,106 INFO L85 PathProgramCache]: Analyzing trace with hash -316309121, now seen corresponding path program 75 times [2022-04-06 20:32:33,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:33,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1344491100] [2022-04-06 20:32:33,107 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:33,107 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash -316309121, now seen corresponding path program 76 times [2022-04-06 20:32:33,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:33,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143075441] [2022-04-06 20:32:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:33,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:33,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:33,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:33,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143075441] [2022-04-06 20:32:33,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143075441] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:33,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074146051] [2022-04-06 20:32:33,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:33,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:33,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:33,254 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:33,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 20:32:33,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:33,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:33,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:32:33,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:33,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 20:32:33,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074146051] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:33,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:33,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 12] total 31 [2022-04-06 20:32:33,646 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:33,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1344491100] [2022-04-06 20:32:33,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1344491100] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:33,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:33,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:32:33,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652690661] [2022-04-06 20:32:33,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:33,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:32:33,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:33,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:32:33,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:32:33,647 INFO L87 Difference]: Start difference. First operand 107 states and 138 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:34,059 INFO L93 Difference]: Finished difference Result 130 states and 161 transitions. [2022-04-06 20:32:34,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:32:34,060 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 20:32:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:34,060 INFO L225 Difference]: With dead ends: 130 [2022-04-06 20:32:34,060 INFO L226 Difference]: Without dead ends: 117 [2022-04-06 20:32:34,061 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=1966, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:32:34,061 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:34,061 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 85 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-06 20:32:34,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 108. [2022-04-06 20:32:34,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 103 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-04-06 20:32:34,087 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 32 [2022-04-06 20:32:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:34,089 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-04-06 20:32:34,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:34,089 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-04-06 20:32:34,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:32:34,089 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:34,089 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:34,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 20:32:34,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-04-06 20:32:34,307 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:34,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:34,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1879174029, now seen corresponding path program 77 times [2022-04-06 20:32:34,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:34,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [624448090] [2022-04-06 20:32:34,308 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:34,308 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:34,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1879174029, now seen corresponding path program 78 times [2022-04-06 20:32:34,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:34,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149836070] [2022-04-06 20:32:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:34,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:34,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:32:34,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:34,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149836070] [2022-04-06 20:32:34,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149836070] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:34,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335762306] [2022-04-06 20:32:34,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:34,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:34,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:34,502 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:34,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 20:32:34,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:32:34,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:34,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:32:34,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:32:34,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:32:34,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335762306] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:34,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:34,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:32:34,917 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:34,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [624448090] [2022-04-06 20:32:34,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [624448090] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:34,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:34,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:32:34,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472721699] [2022-04-06 20:32:34,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:34,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:32:34,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:34,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:32:34,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:32:34,918 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:35,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:35,178 INFO L93 Difference]: Finished difference Result 133 states and 164 transitions. [2022-04-06 20:32:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:32:35,178 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 20:32:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:35,182 INFO L225 Difference]: With dead ends: 133 [2022-04-06 20:32:35,182 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 20:32:35,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=1432, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:32:35,183 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:35,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 75 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 20:32:35,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-04-06 20:32:35,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.3076923076923077) internal successors, (136), 104 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 140 transitions. [2022-04-06 20:32:35,217 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 140 transitions. Word has length 32 [2022-04-06 20:32:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:35,217 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 140 transitions. [2022-04-06 20:32:35,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:35,218 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 140 transitions. [2022-04-06 20:32:35,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:32:35,218 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:35,218 INFO L499 BasicCegarLoop]: trace histogram [15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:35,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:35,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:35,431 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:35,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:35,432 INFO L85 PathProgramCache]: Analyzing trace with hash 237157614, now seen corresponding path program 79 times [2022-04-06 20:32:35,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:35,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1347986041] [2022-04-06 20:32:35,432 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:35,432 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:35,432 INFO L85 PathProgramCache]: Analyzing trace with hash 237157614, now seen corresponding path program 80 times [2022-04-06 20:32:35,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:35,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596749713] [2022-04-06 20:32:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:35,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:35,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:35,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:35,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596749713] [2022-04-06 20:32:35,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596749713] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:35,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157403361] [2022-04-06 20:32:35,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:35,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:35,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:35,673 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:35,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 20:32:35,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:35,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:35,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:32:35,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:35,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:36,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157403361] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:36,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:36,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:32:36,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:36,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1347986041] [2022-04-06 20:32:36,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1347986041] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:36,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:36,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:32:36,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999004002] [2022-04-06 20:32:36,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:36,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:32:36,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:36,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:32:36,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1221, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:32:36,210 INFO L87 Difference]: Start difference. First operand 109 states and 140 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:36,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:36,873 INFO L93 Difference]: Finished difference Result 169 states and 238 transitions. [2022-04-06 20:32:36,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:32:36,873 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 20:32:36,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:36,874 INFO L225 Difference]: With dead ends: 169 [2022-04-06 20:32:36,874 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 20:32:36,874 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=731, Invalid=2691, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:32:36,875 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 91 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:36,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 130 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:32:36,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 20:32:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 115. [2022-04-06 20:32:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.309090909090909) internal successors, (144), 110 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 148 transitions. [2022-04-06 20:32:36,894 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 148 transitions. Word has length 32 [2022-04-06 20:32:36,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:36,894 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 148 transitions. [2022-04-06 20:32:36,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:36,894 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 148 transitions. [2022-04-06 20:32:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:32:36,894 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:36,894 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:36,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-04-06 20:32:37,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:37,107 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:37,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:37,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1766095279, now seen corresponding path program 81 times [2022-04-06 20:32:37,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:37,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1824047316] [2022-04-06 20:32:37,108 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:37,108 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:37,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1766095279, now seen corresponding path program 82 times [2022-04-06 20:32:37,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:37,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478060323] [2022-04-06 20:32:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:37,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:37,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:37,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:37,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478060323] [2022-04-06 20:32:37,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478060323] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:37,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905051876] [2022-04-06 20:32:37,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:37,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:37,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:37,293 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:37,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 20:32:37,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:37,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:37,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 20:32:37,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:37,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:32:37,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905051876] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:37,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:37,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 38 [2022-04-06 20:32:37,736 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:37,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1824047316] [2022-04-06 20:32:37,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1824047316] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:37,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:37,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:32:37,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136396363] [2022-04-06 20:32:37,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:37,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:32:37,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:37,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:32:37,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:32:37,737 INFO L87 Difference]: Start difference. First operand 115 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:37,942 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2022-04-06 20:32:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:32:37,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:32:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:37,942 INFO L225 Difference]: With dead ends: 127 [2022-04-06 20:32:37,942 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 20:32:37,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=2208, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:32:37,949 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:37,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 86 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 20:32:37,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-04-06 20:32:37,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.316831683168317) internal successors, (133), 101 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2022-04-06 20:32:37,966 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 33 [2022-04-06 20:32:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:37,966 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2022-04-06 20:32:37,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2022-04-06 20:32:37,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:32:37,967 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:37,967 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:37,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:38,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 20:32:38,182 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:38,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:38,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1621968767, now seen corresponding path program 83 times [2022-04-06 20:32:38,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:38,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [459551976] [2022-04-06 20:32:38,183 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:38,184 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:38,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1621968767, now seen corresponding path program 84 times [2022-04-06 20:32:38,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:38,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42809101] [2022-04-06 20:32:38,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:38,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:38,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:38,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:38,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42809101] [2022-04-06 20:32:38,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42809101] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:38,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664266998] [2022-04-06 20:32:38,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:38,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:38,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:38,339 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:38,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 20:32:38,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:32:38,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:38,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 20:32:38,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:38,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 20:32:38,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664266998] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:38,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:38,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 14] total 35 [2022-04-06 20:32:38,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:38,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [459551976] [2022-04-06 20:32:38,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [459551976] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:38,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:38,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:32:38,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952659899] [2022-04-06 20:32:38,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:38,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:32:38,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:38,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:32:38,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:32:38,990 INFO L87 Difference]: Start difference. First operand 106 states and 137 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:39,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:39,333 INFO L93 Difference]: Finished difference Result 129 states and 160 transitions. [2022-04-06 20:32:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:32:39,333 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:32:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:39,334 INFO L225 Difference]: With dead ends: 129 [2022-04-06 20:32:39,334 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 20:32:39,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=2060, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:32:39,335 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:39,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 63 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:39,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 20:32:39,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2022-04-06 20:32:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 102 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 138 transitions. [2022-04-06 20:32:39,352 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 138 transitions. Word has length 33 [2022-04-06 20:32:39,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:39,352 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 138 transitions. [2022-04-06 20:32:39,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:39,352 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 138 transitions. [2022-04-06 20:32:39,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:32:39,352 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:39,353 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:39,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-04-06 20:32:39,560 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 20:32:39,561 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:39,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:39,561 INFO L85 PathProgramCache]: Analyzing trace with hash -843221009, now seen corresponding path program 85 times [2022-04-06 20:32:39,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:39,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [509888682] [2022-04-06 20:32:39,562 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:39,562 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:39,562 INFO L85 PathProgramCache]: Analyzing trace with hash -843221009, now seen corresponding path program 86 times [2022-04-06 20:32:39,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:39,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883001737] [2022-04-06 20:32:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:39,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:39,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:32:39,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:39,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883001737] [2022-04-06 20:32:39,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883001737] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:39,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806033025] [2022-04-06 20:32:39,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:39,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:39,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:39,716 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:39,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 20:32:39,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:39,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:39,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 20:32:39,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:32:39,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:32:40,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806033025] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:40,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:40,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 20:32:40,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:40,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [509888682] [2022-04-06 20:32:40,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [509888682] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:40,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:40,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:32:40,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491805025] [2022-04-06 20:32:40,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:40,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:32:40,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:40,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:32:40,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:32:40,110 INFO L87 Difference]: Start difference. First operand 107 states and 138 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:40,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:40,476 INFO L93 Difference]: Finished difference Result 132 states and 163 transitions. [2022-04-06 20:32:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:32:40,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:32:40,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:40,477 INFO L225 Difference]: With dead ends: 132 [2022-04-06 20:32:40,477 INFO L226 Difference]: Without dead ends: 118 [2022-04-06 20:32:40,477 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1656, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:32:40,477 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:40,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 75 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:32:40,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-04-06 20:32:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2022-04-06 20:32:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 103 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-04-06 20:32:40,495 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 33 [2022-04-06 20:32:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:40,497 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-04-06 20:32:40,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-04-06 20:32:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:32:40,497 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:40,497 INFO L499 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:40,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:40,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-04-06 20:32:40,700 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:40,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:40,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1781599729, now seen corresponding path program 87 times [2022-04-06 20:32:40,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:40,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [6219112] [2022-04-06 20:32:40,701 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:40,701 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:40,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1781599729, now seen corresponding path program 88 times [2022-04-06 20:32:40,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:40,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662004723] [2022-04-06 20:32:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:40,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:40,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:40,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:40,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662004723] [2022-04-06 20:32:40,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662004723] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:40,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302749582] [2022-04-06 20:32:40,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:40,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:40,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:40,939 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:40,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 20:32:40,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:40,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:40,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:32:40,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:41,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:41,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302749582] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:41,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:41,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:32:41,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:41,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [6219112] [2022-04-06 20:32:41,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [6219112] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:41,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:41,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:32:41,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053396055] [2022-04-06 20:32:41,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:41,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:32:41,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:41,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:32:41,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1346, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:32:41,597 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:42,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:42,224 INFO L93 Difference]: Finished difference Result 169 states and 239 transitions. [2022-04-06 20:32:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:32:42,224 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:32:42,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:42,225 INFO L225 Difference]: With dead ends: 169 [2022-04-06 20:32:42,225 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 20:32:42,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=808, Invalid=2974, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:32:42,226 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 91 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:42,226 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 135 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:32:42,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 20:32:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 114. [2022-04-06 20:32:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.311926605504587) internal successors, (143), 109 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 147 transitions. [2022-04-06 20:32:42,244 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 147 transitions. Word has length 33 [2022-04-06 20:32:42,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:42,245 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 147 transitions. [2022-04-06 20:32:42,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:42,245 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 147 transitions. [2022-04-06 20:32:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:32:42,245 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:42,245 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:42,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-04-06 20:32:42,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:42,449 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:42,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:42,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1579041151, now seen corresponding path program 89 times [2022-04-06 20:32:42,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:42,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [951620595] [2022-04-06 20:32:42,450 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:42,450 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:42,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1579041151, now seen corresponding path program 90 times [2022-04-06 20:32:42,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:42,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536442317] [2022-04-06 20:32:42,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:42,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:42,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:42,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:42,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536442317] [2022-04-06 20:32:42,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536442317] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:42,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517468196] [2022-04-06 20:32:42,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:42,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:42,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:42,623 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:42,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 20:32:42,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:32:42,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:42,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:32:42,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:42,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:43,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517468196] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:43,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:43,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 39 [2022-04-06 20:32:43,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:43,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [951620595] [2022-04-06 20:32:43,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [951620595] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:43,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:43,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:32:43,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265279333] [2022-04-06 20:32:43,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:43,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:32:43,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:43,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:32:43,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1279, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:32:43,216 INFO L87 Difference]: Start difference. First operand 114 states and 147 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:43,627 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2022-04-06 20:32:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:32:43,627 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 20:32:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:43,628 INFO L225 Difference]: With dead ends: 137 [2022-04-06 20:32:43,628 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 20:32:43,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=347, Invalid=2515, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:32:43,629 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:43,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 93 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 20:32:43,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 115. [2022-04-06 20:32:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.309090909090909) internal successors, (144), 110 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 148 transitions. [2022-04-06 20:32:43,650 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 148 transitions. Word has length 34 [2022-04-06 20:32:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:43,650 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 148 transitions. [2022-04-06 20:32:43,650 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:43,650 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 148 transitions. [2022-04-06 20:32:43,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:32:43,650 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:43,650 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:43,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:43,866 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 20:32:43,866 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:43,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:43,866 INFO L85 PathProgramCache]: Analyzing trace with hash 661878733, now seen corresponding path program 91 times [2022-04-06 20:32:43,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:43,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1468421147] [2022-04-06 20:32:43,874 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:43,874 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:43,874 INFO L85 PathProgramCache]: Analyzing trace with hash 661878733, now seen corresponding path program 92 times [2022-04-06 20:32:43,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:43,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502333234] [2022-04-06 20:32:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:43,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:44,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:32:44,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:44,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502333234] [2022-04-06 20:32:44,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502333234] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:44,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094066421] [2022-04-06 20:32:44,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:44,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:44,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:44,036 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:44,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 20:32:44,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:44,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:44,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:32:44,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:32:44,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:32:44,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094066421] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:44,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:44,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 20:32:44,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:44,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1468421147] [2022-04-06 20:32:44,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1468421147] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:44,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:44,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:32:44,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186150355] [2022-04-06 20:32:44,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:44,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:32:44,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:44,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:32:44,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:32:44,427 INFO L87 Difference]: Start difference. First operand 115 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:44,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:44,840 INFO L93 Difference]: Finished difference Result 140 states and 173 transitions. [2022-04-06 20:32:44,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:32:44,840 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 20:32:44,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:44,841 INFO L225 Difference]: With dead ends: 140 [2022-04-06 20:32:44,841 INFO L226 Difference]: Without dead ends: 126 [2022-04-06 20:32:44,841 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=474, Invalid=1976, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:32:44,841 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:44,842 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 70 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:44,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-04-06 20:32:44,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2022-04-06 20:32:44,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.3063063063063063) internal successors, (145), 111 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 149 transitions. [2022-04-06 20:32:44,873 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 149 transitions. Word has length 34 [2022-04-06 20:32:44,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:44,873 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 149 transitions. [2022-04-06 20:32:44,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 149 transitions. [2022-04-06 20:32:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:32:44,874 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:44,874 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:44,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:45,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:45,075 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:45,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:45,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2379647, now seen corresponding path program 93 times [2022-04-06 20:32:45,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:45,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [207640598] [2022-04-06 20:32:45,076 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:45,076 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:45,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2379647, now seen corresponding path program 94 times [2022-04-06 20:32:45,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:45,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950743276] [2022-04-06 20:32:45,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:45,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:45,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:32:45,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:45,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950743276] [2022-04-06 20:32:45,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950743276] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:45,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272904629] [2022-04-06 20:32:45,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:45,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:45,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:45,213 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:45,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 20:32:45,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:45,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:45,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 20:32:45,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:32:45,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:32:45,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272904629] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:45,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:45,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 20:32:45,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:45,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [207640598] [2022-04-06 20:32:45,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [207640598] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:45,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:45,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:32:45,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639947531] [2022-04-06 20:32:45,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:45,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:32:45,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:45,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:32:45,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:32:45,508 INFO L87 Difference]: Start difference. First operand 116 states and 149 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:45,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:45,776 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2022-04-06 20:32:45,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:32:45,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 20:32:45,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:45,777 INFO L225 Difference]: With dead ends: 143 [2022-04-06 20:32:45,777 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 20:32:45,778 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=426, Invalid=1644, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:32:45,778 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:45,779 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 80 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:45,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 20:32:45,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 117. [2022-04-06 20:32:45,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.3035714285714286) internal successors, (146), 112 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 150 transitions. [2022-04-06 20:32:45,808 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 150 transitions. Word has length 34 [2022-04-06 20:32:45,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:45,808 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 150 transitions. [2022-04-06 20:32:45,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:45,808 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 150 transitions. [2022-04-06 20:32:45,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:32:45,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:45,809 INFO L499 BasicCegarLoop]: trace histogram [17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:45,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:46,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 20:32:46,014 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:46,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:46,014 INFO L85 PathProgramCache]: Analyzing trace with hash 61432078, now seen corresponding path program 95 times [2022-04-06 20:32:46,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:46,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1824732519] [2022-04-06 20:32:46,015 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:46,015 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:46,015 INFO L85 PathProgramCache]: Analyzing trace with hash 61432078, now seen corresponding path program 96 times [2022-04-06 20:32:46,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:46,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68101655] [2022-04-06 20:32:46,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:46,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:46,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:46,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:46,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68101655] [2022-04-06 20:32:46,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68101655] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:46,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991092380] [2022-04-06 20:32:46,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:46,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:46,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:46,272 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:46,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 20:32:46,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:32:46,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:46,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:32:46,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:32:46,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:32:46,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991092380] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:46,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:46,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 6, 6] total 29 [2022-04-06 20:32:46,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:46,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1824732519] [2022-04-06 20:32:46,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1824732519] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:46,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:46,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:32:46,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216754477] [2022-04-06 20:32:46,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:46,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:32:46,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:46,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:32:46,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:32:46,512 INFO L87 Difference]: Start difference. First operand 117 states and 150 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:47,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:47,281 INFO L93 Difference]: Finished difference Result 179 states and 252 transitions. [2022-04-06 20:32:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:32:47,281 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 20:32:47,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:47,282 INFO L225 Difference]: With dead ends: 179 [2022-04-06 20:32:47,282 INFO L226 Difference]: Without dead ends: 171 [2022-04-06 20:32:47,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=2279, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:32:47,282 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 99 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:47,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 138 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:32:47,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-04-06 20:32:47,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 123. [2022-04-06 20:32:47,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.305084745762712) internal successors, (154), 118 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:47,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 158 transitions. [2022-04-06 20:32:47,307 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 158 transitions. Word has length 34 [2022-04-06 20:32:47,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:47,307 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 158 transitions. [2022-04-06 20:32:47,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:47,307 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 158 transitions. [2022-04-06 20:32:47,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:32:47,307 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:47,307 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:47,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-04-06 20:32:47,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-04-06 20:32:47,511 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:47,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:47,512 INFO L85 PathProgramCache]: Analyzing trace with hash 248285055, now seen corresponding path program 97 times [2022-04-06 20:32:47,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:47,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1068923557] [2022-04-06 20:32:47,512 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:47,512 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:47,512 INFO L85 PathProgramCache]: Analyzing trace with hash 248285055, now seen corresponding path program 98 times [2022-04-06 20:32:47,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:47,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410029089] [2022-04-06 20:32:47,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:47,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:47,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:47,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:47,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410029089] [2022-04-06 20:32:47,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410029089] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:47,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498011422] [2022-04-06 20:32:47,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:47,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:47,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:47,639 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:47,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 20:32:47,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:47,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:47,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:32:47,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:47,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:47,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498011422] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:47,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:47,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 15 [2022-04-06 20:32:47,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:47,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1068923557] [2022-04-06 20:32:47,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1068923557] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:47,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:47,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:32:47,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805711654] [2022-04-06 20:32:47,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:47,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:32:47,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:47,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:32:47,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:32:47,851 INFO L87 Difference]: Start difference. First operand 123 states and 158 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:48,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:48,208 INFO L93 Difference]: Finished difference Result 314 states and 413 transitions. [2022-04-06 20:32:48,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:32:48,209 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 20:32:48,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:48,210 INFO L225 Difference]: With dead ends: 314 [2022-04-06 20:32:48,210 INFO L226 Difference]: Without dead ends: 301 [2022-04-06 20:32:48,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:32:48,211 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:48,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 84 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:32:48,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-04-06 20:32:48,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 127. [2022-04-06 20:32:48,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.3114754098360655) internal successors, (160), 122 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:48,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 164 transitions. [2022-04-06 20:32:48,243 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 164 transitions. Word has length 35 [2022-04-06 20:32:48,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:48,244 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 164 transitions. [2022-04-06 20:32:48,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:48,244 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 164 transitions. [2022-04-06 20:32:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:32:48,244 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:48,244 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:48,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:48,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:48,459 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:48,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:48,460 INFO L85 PathProgramCache]: Analyzing trace with hash 75330479, now seen corresponding path program 99 times [2022-04-06 20:32:48,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:48,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1412610201] [2022-04-06 20:32:48,461 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:48,461 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash 75330479, now seen corresponding path program 100 times [2022-04-06 20:32:48,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:48,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640347746] [2022-04-06 20:32:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:48,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:48,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:32:48,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:48,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640347746] [2022-04-06 20:32:48,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640347746] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:48,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585628614] [2022-04-06 20:32:48,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:48,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:48,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:48,598 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:48,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 20:32:48,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:48,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:48,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 20:32:48,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:32:48,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 20:32:49,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585628614] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:49,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:49,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 14] total 36 [2022-04-06 20:32:49,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:49,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1412610201] [2022-04-06 20:32:49,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1412610201] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:49,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:49,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:32:49,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129299644] [2022-04-06 20:32:49,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:49,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:32:49,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:49,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:32:49,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:32:49,172 INFO L87 Difference]: Start difference. First operand 127 states and 164 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:49,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:49,519 INFO L93 Difference]: Finished difference Result 152 states and 189 transitions. [2022-04-06 20:32:49,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:32:49,519 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 20:32:49,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:49,520 INFO L225 Difference]: With dead ends: 152 [2022-04-06 20:32:49,520 INFO L226 Difference]: Without dead ends: 138 [2022-04-06 20:32:49,520 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=366, Invalid=2714, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:32:49,521 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:49,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 70 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:49,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-06 20:32:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 128. [2022-04-06 20:32:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.3089430894308942) internal successors, (161), 123 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 165 transitions. [2022-04-06 20:32:49,577 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 165 transitions. Word has length 35 [2022-04-06 20:32:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:49,577 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 165 transitions. [2022-04-06 20:32:49,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 165 transitions. [2022-04-06 20:32:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:32:49,578 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:49,578 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:49,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:49,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 20:32:49,802 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:49,802 INFO L85 PathProgramCache]: Analyzing trace with hash 963858751, now seen corresponding path program 101 times [2022-04-06 20:32:49,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:49,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [28558928] [2022-04-06 20:32:49,802 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:49,803 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:49,803 INFO L85 PathProgramCache]: Analyzing trace with hash 963858751, now seen corresponding path program 102 times [2022-04-06 20:32:49,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:49,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661310161] [2022-04-06 20:32:49,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:49,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:49,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:32:49,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:49,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661310161] [2022-04-06 20:32:49,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661310161] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:49,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223848687] [2022-04-06 20:32:49,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:49,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:49,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:49,963 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:49,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 20:32:50,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:32:50,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:50,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:32:50,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:32:50,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:32:50,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223848687] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:50,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:50,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 20:32:50,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:50,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [28558928] [2022-04-06 20:32:50,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [28558928] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:50,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:50,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:32:50,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678044345] [2022-04-06 20:32:50,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:50,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:32:50,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:50,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:32:50,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:32:50,387 INFO L87 Difference]: Start difference. First operand 128 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:50,719 INFO L93 Difference]: Finished difference Result 155 states and 192 transitions. [2022-04-06 20:32:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:32:50,719 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 20:32:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:50,720 INFO L225 Difference]: With dead ends: 155 [2022-04-06 20:32:50,720 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 20:32:50,721 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=509, Invalid=2041, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:32:50,721 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:50,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 77 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:50,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 20:32:50,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 129. [2022-04-06 20:32:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.3064516129032258) internal successors, (162), 124 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 166 transitions. [2022-04-06 20:32:50,745 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 166 transitions. Word has length 35 [2022-04-06 20:32:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:50,745 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 166 transitions. [2022-04-06 20:32:50,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 166 transitions. [2022-04-06 20:32:50,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:32:50,745 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:50,745 INFO L499 BasicCegarLoop]: trace histogram [18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:50,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-04-06 20:32:50,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-04-06 20:32:50,955 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:50,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:50,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1360843247, now seen corresponding path program 103 times [2022-04-06 20:32:50,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:50,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1602650915] [2022-04-06 20:32:50,956 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:50,956 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:50,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1360843247, now seen corresponding path program 104 times [2022-04-06 20:32:50,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:50,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194526359] [2022-04-06 20:32:50,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:50,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:51,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:51,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:51,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194526359] [2022-04-06 20:32:51,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194526359] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:51,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5253001] [2022-04-06 20:32:51,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:51,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:51,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:51,226 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:51,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 20:32:51,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:51,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:51,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:32:51,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:51,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:51,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5253001] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:51,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:51,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:32:51,963 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:51,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1602650915] [2022-04-06 20:32:51,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1602650915] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:51,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:51,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:32:51,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897840692] [2022-04-06 20:32:51,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:51,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:32:51,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:51,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:32:51,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1614, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:32:51,965 INFO L87 Difference]: Start difference. First operand 129 states and 166 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:52,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:52,871 INFO L93 Difference]: Finished difference Result 201 states and 286 transitions. [2022-04-06 20:32:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:32:52,871 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 20:32:52,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:52,872 INFO L225 Difference]: With dead ends: 201 [2022-04-06 20:32:52,872 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 20:32:52,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=974, Invalid=3582, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:32:52,872 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 107 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:52,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 146 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:32:52,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 20:32:52,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 135. [2022-04-06 20:32:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.3076923076923077) internal successors, (170), 130 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 174 transitions. [2022-04-06 20:32:52,898 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 174 transitions. Word has length 35 [2022-04-06 20:32:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:52,898 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 174 transitions. [2022-04-06 20:32:52,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 174 transitions. [2022-04-06 20:32:52,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:32:52,898 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:52,898 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:52,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:53,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:53,103 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:53,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1944519039, now seen corresponding path program 105 times [2022-04-06 20:32:53,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:53,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1694396880] [2022-04-06 20:32:53,104 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:53,104 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1944519039, now seen corresponding path program 106 times [2022-04-06 20:32:53,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:53,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972382075] [2022-04-06 20:32:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:53,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:53,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:53,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:53,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972382075] [2022-04-06 20:32:53,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972382075] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:53,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479463643] [2022-04-06 20:32:53,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:53,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:53,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:53,274 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:53,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 20:32:53,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:53,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:53,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 20:32:53,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:53,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:32:53,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479463643] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:53,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:53,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2022-04-06 20:32:53,773 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:53,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1694396880] [2022-04-06 20:32:53,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1694396880] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:53,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:53,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:32:53,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823212810] [2022-04-06 20:32:53,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:53,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:32:53,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:53,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:32:53,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1515, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:32:53,774 INFO L87 Difference]: Start difference. First operand 135 states and 174 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:54,070 INFO L93 Difference]: Finished difference Result 148 states and 186 transitions. [2022-04-06 20:32:54,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:32:54,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 20:32:54,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:54,071 INFO L225 Difference]: With dead ends: 148 [2022-04-06 20:32:54,071 INFO L226 Difference]: Without dead ends: 125 [2022-04-06 20:32:54,071 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=555, Invalid=2867, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:32:54,071 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:54,071 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 96 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-06 20:32:54,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-04-06 20:32:54,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.3166666666666667) internal successors, (158), 120 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 162 transitions. [2022-04-06 20:32:54,094 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 162 transitions. Word has length 36 [2022-04-06 20:32:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:54,094 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 162 transitions. [2022-04-06 20:32:54,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 162 transitions. [2022-04-06 20:32:54,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:32:54,094 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:54,094 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:54,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-04-06 20:32:54,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:54,303 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:54,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash -927796211, now seen corresponding path program 107 times [2022-04-06 20:32:54,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:54,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [236751868] [2022-04-06 20:32:54,304 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:54,304 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash -927796211, now seen corresponding path program 108 times [2022-04-06 20:32:54,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:54,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733308008] [2022-04-06 20:32:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:54,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:54,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:32:54,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:54,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733308008] [2022-04-06 20:32:54,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733308008] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:54,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852347096] [2022-04-06 20:32:54,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:54,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:54,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:54,453 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:54,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 20:32:54,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:32:54,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:54,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:32:54,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:32:54,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 20:32:55,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852347096] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:55,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:55,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 16] total 40 [2022-04-06 20:32:55,090 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:55,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [236751868] [2022-04-06 20:32:55,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [236751868] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:55,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:55,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:32:55,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505640327] [2022-04-06 20:32:55,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:55,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:32:55,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:55,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:32:55,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:32:55,091 INFO L87 Difference]: Start difference. First operand 125 states and 162 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:55,462 INFO L93 Difference]: Finished difference Result 150 states and 187 transitions. [2022-04-06 20:32:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:32:55,462 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 20:32:55,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:55,463 INFO L225 Difference]: With dead ends: 150 [2022-04-06 20:32:55,463 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 20:32:55,463 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=358, Invalid=2722, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:32:55,463 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:55,463 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 83 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:55,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 20:32:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 126. [2022-04-06 20:32:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.3140495867768596) internal successors, (159), 121 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:55,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 163 transitions. [2022-04-06 20:32:55,515 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 163 transitions. Word has length 36 [2022-04-06 20:32:55,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:55,515 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 163 transitions. [2022-04-06 20:32:55,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:55,516 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 163 transitions. [2022-04-06 20:32:55,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:32:55,516 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:55,516 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:55,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:55,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:55,732 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:55,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:55,732 INFO L85 PathProgramCache]: Analyzing trace with hash 704939903, now seen corresponding path program 109 times [2022-04-06 20:32:55,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:55,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1033077626] [2022-04-06 20:32:55,733 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:55,733 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:55,733 INFO L85 PathProgramCache]: Analyzing trace with hash 704939903, now seen corresponding path program 110 times [2022-04-06 20:32:55,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:55,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023561352] [2022-04-06 20:32:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:55,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:55,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:32:55,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:55,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023561352] [2022-04-06 20:32:55,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023561352] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:55,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032525289] [2022-04-06 20:32:55,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:55,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:55,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:55,900 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:55,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 20:32:55,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:55,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:55,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:32:55,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:32:56,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:32:56,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032525289] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:56,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:56,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:32:56,373 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:56,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1033077626] [2022-04-06 20:32:56,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1033077626] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:56,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:56,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:32:56,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036946409] [2022-04-06 20:32:56,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:56,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:32:56,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:56,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:32:56,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:32:56,374 INFO L87 Difference]: Start difference. First operand 126 states and 163 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:56,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:56,814 INFO L93 Difference]: Finished difference Result 153 states and 190 transitions. [2022-04-06 20:32:56,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:32:56,814 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 20:32:56,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:56,815 INFO L225 Difference]: With dead ends: 153 [2022-04-06 20:32:56,815 INFO L226 Difference]: Without dead ends: 138 [2022-04-06 20:32:56,815 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=533, Invalid=2223, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:32:56,816 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:56,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 85 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:32:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-06 20:32:56,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 127. [2022-04-06 20:32:56,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.3114754098360655) internal successors, (160), 122 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 164 transitions. [2022-04-06 20:32:56,842 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 164 transitions. Word has length 36 [2022-04-06 20:32:56,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:56,842 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 164 transitions. [2022-04-06 20:32:56,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:56,842 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 164 transitions. [2022-04-06 20:32:56,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:32:56,843 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:56,843 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:56,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:57,058 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 20:32:57,059 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:57,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:57,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1735304717, now seen corresponding path program 111 times [2022-04-06 20:32:57,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:57,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1409926897] [2022-04-06 20:32:57,060 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:57,060 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:57,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1735304717, now seen corresponding path program 112 times [2022-04-06 20:32:57,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:57,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654662767] [2022-04-06 20:32:57,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:57,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:57,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:32:57,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:57,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654662767] [2022-04-06 20:32:57,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654662767] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:57,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378491942] [2022-04-06 20:32:57,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:57,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:57,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:57,213 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:57,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 20:32:57,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:57,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:57,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:32:57,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:32:57,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:32:57,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378491942] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:57,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:57,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 20:32:57,571 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:57,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1409926897] [2022-04-06 20:32:57,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1409926897] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:57,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:57,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:32:57,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154281170] [2022-04-06 20:32:57,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:57,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:32:57,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:57,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:32:57,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:32:57,572 INFO L87 Difference]: Start difference. First operand 127 states and 164 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:57,839 INFO L93 Difference]: Finished difference Result 156 states and 193 transitions. [2022-04-06 20:32:57,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:32:57,839 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 20:32:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:57,840 INFO L225 Difference]: With dead ends: 156 [2022-04-06 20:32:57,840 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 20:32:57,840 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=482, Invalid=1870, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:32:57,840 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:57,841 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 80 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:32:57,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 20:32:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2022-04-06 20:32:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.3089430894308942) internal successors, (161), 123 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 165 transitions. [2022-04-06 20:32:57,873 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 165 transitions. Word has length 36 [2022-04-06 20:32:57,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:57,873 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 165 transitions. [2022-04-06 20:32:57,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:57,873 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 165 transitions. [2022-04-06 20:32:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:32:57,874 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:57,874 INFO L499 BasicCegarLoop]: trace histogram [19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:57,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-04-06 20:32:58,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-04-06 20:32:58,075 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:58,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:58,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1307083474, now seen corresponding path program 113 times [2022-04-06 20:32:58,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:58,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1119026046] [2022-04-06 20:32:58,076 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:58,077 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:58,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1307083474, now seen corresponding path program 114 times [2022-04-06 20:32:58,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:58,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512357923] [2022-04-06 20:32:58,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:58,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:58,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:32:58,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:58,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512357923] [2022-04-06 20:32:58,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512357923] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:58,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762134169] [2022-04-06 20:32:58,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:58,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:58,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:58,377 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:58,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 20:32:58,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:32:58,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:58,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:32:58,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:32:58,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:32:58,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762134169] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:58,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:58,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 31 [2022-04-06 20:32:58,547 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:58,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1119026046] [2022-04-06 20:32:58,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1119026046] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:58,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:58,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:32:58,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020288429] [2022-04-06 20:32:58,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:58,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:32:58,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:58,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:32:58,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:32:58,548 INFO L87 Difference]: Start difference. First operand 128 states and 165 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:59,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:59,257 INFO L93 Difference]: Finished difference Result 201 states and 287 transitions. [2022-04-06 20:32:59,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:32:59,257 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 20:32:59,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:59,258 INFO L225 Difference]: With dead ends: 201 [2022-04-06 20:32:59,258 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 20:32:59,258 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=2679, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:32:59,258 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 107 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:59,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 156 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2011 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:32:59,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 20:32:59,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 134. [2022-04-06 20:32:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.310077519379845) internal successors, (169), 129 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:59,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 173 transitions. [2022-04-06 20:32:59,284 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 173 transitions. Word has length 36 [2022-04-06 20:32:59,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:59,284 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 173 transitions. [2022-04-06 20:32:59,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:59,284 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 173 transitions. [2022-04-06 20:32:59,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:32:59,284 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:59,284 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:59,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:59,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-04-06 20:32:59,499 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:59,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:59,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1959952529, now seen corresponding path program 115 times [2022-04-06 20:32:59,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:59,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1592344498] [2022-04-06 20:32:59,500 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:59,500 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:59,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1959952529, now seen corresponding path program 116 times [2022-04-06 20:32:59,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:59,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469998350] [2022-04-06 20:32:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:59,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:59,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:32:59,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:59,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469998350] [2022-04-06 20:32:59,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469998350] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:59,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844001131] [2022-04-06 20:32:59,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:59,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:59,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:59,720 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:59,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 20:32:59,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:59,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:59,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 20:32:59,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:33:00,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:33:00,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844001131] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:00,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:00,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 18] total 44 [2022-04-06 20:33:00,454 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:00,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1592344498] [2022-04-06 20:33:00,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1592344498] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:00,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:00,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:33:00,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445492106] [2022-04-06 20:33:00,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:00,454 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:33:00,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:33:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:33:00,455 INFO L87 Difference]: Start difference. First operand 134 states and 173 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:00,870 INFO L93 Difference]: Finished difference Result 159 states and 198 transitions. [2022-04-06 20:33:00,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:33:00,870 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:33:00,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:00,871 INFO L225 Difference]: With dead ends: 159 [2022-04-06 20:33:00,871 INFO L226 Difference]: Without dead ends: 145 [2022-04-06 20:33:00,871 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=419, Invalid=3241, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:33:00,871 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:00,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 78 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:33:00,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-04-06 20:33:00,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 135. [2022-04-06 20:33:00,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.3076923076923077) internal successors, (170), 130 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 174 transitions. [2022-04-06 20:33:00,899 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 174 transitions. Word has length 37 [2022-04-06 20:33:00,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:00,899 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 174 transitions. [2022-04-06 20:33:00,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:00,899 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 174 transitions. [2022-04-06 20:33:00,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:33:00,900 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:00,900 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:00,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:01,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:01,115 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:01,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:01,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1268390207, now seen corresponding path program 117 times [2022-04-06 20:33:01,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:01,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1203941598] [2022-04-06 20:33:01,116 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:01,116 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:01,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1268390207, now seen corresponding path program 118 times [2022-04-06 20:33:01,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:01,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095609460] [2022-04-06 20:33:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:01,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:01,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:33:01,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:01,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095609460] [2022-04-06 20:33:01,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095609460] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:01,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245488792] [2022-04-06 20:33:01,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:01,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:01,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:01,289 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:01,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 20:33:01,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:01,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:01,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:33:01,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:33:01,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:33:01,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245488792] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:01,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:01,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:33:01,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:01,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1203941598] [2022-04-06 20:33:01,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1203941598] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:01,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:01,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:33:01,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225541437] [2022-04-06 20:33:01,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:01,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:33:01,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:01,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:33:01,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:33:01,639 INFO L87 Difference]: Start difference. First operand 135 states and 174 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:02,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:02,033 INFO L93 Difference]: Finished difference Result 162 states and 201 transitions. [2022-04-06 20:33:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:33:02,033 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:33:02,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:02,034 INFO L225 Difference]: With dead ends: 162 [2022-04-06 20:33:02,034 INFO L226 Difference]: Without dead ends: 147 [2022-04-06 20:33:02,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=2597, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:33:02,034 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:02,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 90 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:02,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-04-06 20:33:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2022-04-06 20:33:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.3053435114503817) internal successors, (171), 131 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 175 transitions. [2022-04-06 20:33:02,060 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 175 transitions. Word has length 37 [2022-04-06 20:33:02,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:02,060 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 175 transitions. [2022-04-06 20:33:02,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 175 transitions. [2022-04-06 20:33:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:33:02,061 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:02,061 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:02,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:02,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:02,274 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:02,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1252004433, now seen corresponding path program 119 times [2022-04-06 20:33:02,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:02,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1188574456] [2022-04-06 20:33:02,275 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:02,276 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:02,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1252004433, now seen corresponding path program 120 times [2022-04-06 20:33:02,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:02,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408008302] [2022-04-06 20:33:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:02,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:02,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:02,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:02,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408008302] [2022-04-06 20:33:02,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408008302] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:02,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230165290] [2022-04-06 20:33:02,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:02,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:02,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:02,418 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:02,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 20:33:02,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:33:02,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:02,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:33:02,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:02,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:02,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230165290] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:02,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:02,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:33:02,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:02,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1188574456] [2022-04-06 20:33:02,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1188574456] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:02,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:02,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:33:02,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490818449] [2022-04-06 20:33:02,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:02,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:33:02,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:02,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:33:02,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:33:02,935 INFO L87 Difference]: Start difference. First operand 136 states and 175 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:03,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:03,380 INFO L93 Difference]: Finished difference Result 165 states and 204 transitions. [2022-04-06 20:33:03,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:33:03,380 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:33:03,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:03,381 INFO L225 Difference]: With dead ends: 165 [2022-04-06 20:33:03,381 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 20:33:03,381 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=568, Invalid=2294, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:33:03,381 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:03,381 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 87 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:03,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 20:33:03,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 137. [2022-04-06 20:33:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.303030303030303) internal successors, (172), 132 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 176 transitions. [2022-04-06 20:33:03,413 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 176 transitions. Word has length 37 [2022-04-06 20:33:03,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:03,413 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 176 transitions. [2022-04-06 20:33:03,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 176 transitions. [2022-04-06 20:33:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:33:03,414 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:03,414 INFO L499 BasicCegarLoop]: trace histogram [20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:03,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-06 20:33:03,629 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 20:33:03,629 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:03,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:03,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1886534095, now seen corresponding path program 121 times [2022-04-06 20:33:03,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:03,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1781576103] [2022-04-06 20:33:03,630 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:03,631 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:03,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1886534095, now seen corresponding path program 122 times [2022-04-06 20:33:03,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:03,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944358556] [2022-04-06 20:33:03,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:03,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:03,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:33:03,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:03,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944358556] [2022-04-06 20:33:03,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944358556] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:03,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692678640] [2022-04-06 20:33:03,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:03,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:03,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:03,939 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:03,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 20:33:03,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:03,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:03,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:33:03,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:33:04,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:33:04,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692678640] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:04,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:04,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 47 [2022-04-06 20:33:04,643 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:04,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1781576103] [2022-04-06 20:33:04,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1781576103] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:04,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:04,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:33:04,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984004255] [2022-04-06 20:33:04,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:04,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:33:04,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:04,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:33:04,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1632, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:33:04,644 INFO L87 Difference]: Start difference. First operand 137 states and 176 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:05,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:05,463 INFO L93 Difference]: Finished difference Result 211 states and 300 transitions. [2022-04-06 20:33:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:33:05,463 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:33:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:05,464 INFO L225 Difference]: With dead ends: 211 [2022-04-06 20:33:05,464 INFO L226 Difference]: Without dead ends: 203 [2022-04-06 20:33:05,464 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1135, Invalid=3835, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:33:05,469 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 115 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2239 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:05,469 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 164 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2239 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:33:05,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-04-06 20:33:05,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 143. [2022-04-06 20:33:05,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.3043478260869565) internal successors, (180), 138 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 184 transitions. [2022-04-06 20:33:05,507 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 184 transitions. Word has length 37 [2022-04-06 20:33:05,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:05,507 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 184 transitions. [2022-04-06 20:33:05,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:05,507 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 184 transitions. [2022-04-06 20:33:05,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:33:05,507 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:05,507 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:05,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:05,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-04-06 20:33:05,720 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:05,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:05,720 INFO L85 PathProgramCache]: Analyzing trace with hash 402939981, now seen corresponding path program 123 times [2022-04-06 20:33:05,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:05,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1440841584] [2022-04-06 20:33:05,721 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:05,721 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:05,721 INFO L85 PathProgramCache]: Analyzing trace with hash 402939981, now seen corresponding path program 124 times [2022-04-06 20:33:05,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:05,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098136144] [2022-04-06 20:33:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:05,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:05,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:33:05,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:05,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098136144] [2022-04-06 20:33:05,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098136144] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:05,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014775361] [2022-04-06 20:33:05,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:05,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:05,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:05,901 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:05,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 20:33:05,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:05,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:05,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:33:05,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:33:06,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:33:06,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014775361] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:06,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:06,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 16 [2022-04-06 20:33:06,098 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:06,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1440841584] [2022-04-06 20:33:06,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1440841584] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:06,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:06,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:33:06,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120207440] [2022-04-06 20:33:06,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:06,099 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:33:06,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:06,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:33:06,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:33:06,099 INFO L87 Difference]: Start difference. First operand 143 states and 184 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:06,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:06,607 INFO L93 Difference]: Finished difference Result 395 states and 523 transitions. [2022-04-06 20:33:06,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:33:06,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 20:33:06,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:06,608 INFO L225 Difference]: With dead ends: 395 [2022-04-06 20:33:06,608 INFO L226 Difference]: Without dead ends: 381 [2022-04-06 20:33:06,608 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:33:06,610 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 35 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:06,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 92 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:06,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-04-06 20:33:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 147. [2022-04-06 20:33:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.3098591549295775) internal successors, (186), 142 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 190 transitions. [2022-04-06 20:33:06,642 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 190 transitions. Word has length 38 [2022-04-06 20:33:06,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:06,642 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 190 transitions. [2022-04-06 20:33:06,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:06,642 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 190 transitions. [2022-04-06 20:33:06,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:33:06,642 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:06,642 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:06,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:06,857 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:06,857 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:06,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:06,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1555480447, now seen corresponding path program 125 times [2022-04-06 20:33:06,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:06,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [547972915] [2022-04-06 20:33:06,858 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:06,858 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:06,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1555480447, now seen corresponding path program 126 times [2022-04-06 20:33:06,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:06,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321974365] [2022-04-06 20:33:06,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:06,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:07,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:33:07,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:07,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321974365] [2022-04-06 20:33:07,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321974365] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:07,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44674440] [2022-04-06 20:33:07,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:07,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:07,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:07,032 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:07,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 20:33:07,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:33:07,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:07,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 20:33:07,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:33:07,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 20:33:07,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44674440] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:07,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:07,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 16] total 41 [2022-04-06 20:33:07,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:07,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [547972915] [2022-04-06 20:33:07,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [547972915] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:07,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:07,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:33:07,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9895223] [2022-04-06 20:33:07,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:07,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:33:07,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:07,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:33:07,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:33:07,788 INFO L87 Difference]: Start difference. First operand 147 states and 190 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:08,406 INFO L93 Difference]: Finished difference Result 174 states and 217 transitions. [2022-04-06 20:33:08,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:33:08,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 20:33:08,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:08,407 INFO L225 Difference]: With dead ends: 174 [2022-04-06 20:33:08,407 INFO L226 Difference]: Without dead ends: 159 [2022-04-06 20:33:08,407 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=450, Invalid=3582, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:33:08,408 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:08,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 80 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:08,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-06 20:33:08,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2022-04-06 20:33:08,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.3076923076923077) internal successors, (187), 143 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:08,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 191 transitions. [2022-04-06 20:33:08,449 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 191 transitions. Word has length 38 [2022-04-06 20:33:08,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:08,449 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 191 transitions. [2022-04-06 20:33:08,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:08,449 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 191 transitions. [2022-04-06 20:33:08,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:33:08,449 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:08,450 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:08,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:08,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 20:33:08,656 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:08,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:08,656 INFO L85 PathProgramCache]: Analyzing trace with hash 630692429, now seen corresponding path program 127 times [2022-04-06 20:33:08,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:08,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1412588132] [2022-04-06 20:33:08,657 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:08,657 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:08,657 INFO L85 PathProgramCache]: Analyzing trace with hash 630692429, now seen corresponding path program 128 times [2022-04-06 20:33:08,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:08,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932787967] [2022-04-06 20:33:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:08,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:08,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:08,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:08,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932787967] [2022-04-06 20:33:08,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932787967] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:08,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776247323] [2022-04-06 20:33:08,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:08,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:08,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:08,835 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:08,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 20:33:08,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:08,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:08,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:33:08,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:08,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:09,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776247323] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:09,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:09,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:33:09,195 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:09,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1412588132] [2022-04-06 20:33:09,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1412588132] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:09,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:09,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:33:09,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498325429] [2022-04-06 20:33:09,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:09,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:33:09,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:09,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:33:09,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:33:09,196 INFO L87 Difference]: Start difference. First operand 148 states and 191 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:09,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:09,577 INFO L93 Difference]: Finished difference Result 177 states and 220 transitions. [2022-04-06 20:33:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:33:09,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 20:33:09,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:09,577 INFO L225 Difference]: With dead ends: 177 [2022-04-06 20:33:09,577 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 20:33:09,578 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=662, Invalid=2760, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:33:09,578 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:09,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 92 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:09,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 20:33:09,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 149. [2022-04-06 20:33:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.3055555555555556) internal successors, (188), 144 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 192 transitions. [2022-04-06 20:33:09,615 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 192 transitions. Word has length 38 [2022-04-06 20:33:09,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:09,615 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 192 transitions. [2022-04-06 20:33:09,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:09,615 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 192 transitions. [2022-04-06 20:33:09,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:33:09,631 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:09,632 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:09,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:09,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 20:33:09,847 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:09,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:09,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1787736705, now seen corresponding path program 129 times [2022-04-06 20:33:09,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:09,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1001950871] [2022-04-06 20:33:09,848 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:09,849 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:09,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1787736705, now seen corresponding path program 130 times [2022-04-06 20:33:09,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:09,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743293363] [2022-04-06 20:33:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:09,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:10,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:10,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:10,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743293363] [2022-04-06 20:33:10,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743293363] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:10,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399923578] [2022-04-06 20:33:10,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:10,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:10,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:10,035 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:10,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 20:33:10,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:10,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:10,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:33:10,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:10,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:10,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399923578] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:10,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:10,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:33:10,500 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:10,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1001950871] [2022-04-06 20:33:10,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1001950871] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:10,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:10,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:33:10,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376242587] [2022-04-06 20:33:10,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:10,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:33:10,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:10,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:33:10,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:33:10,501 INFO L87 Difference]: Start difference. First operand 149 states and 192 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:10,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:10,959 INFO L93 Difference]: Finished difference Result 180 states and 223 transitions. [2022-04-06 20:33:10,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:33:10,960 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 20:33:10,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:10,960 INFO L225 Difference]: With dead ends: 180 [2022-04-06 20:33:10,960 INFO L226 Difference]: Without dead ends: 163 [2022-04-06 20:33:10,961 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=542, Invalid=2110, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:33:10,961 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:10,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 88 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-06 20:33:10,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 150. [2022-04-06 20:33:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.303448275862069) internal successors, (189), 145 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 193 transitions. [2022-04-06 20:33:10,999 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 193 transitions. Word has length 38 [2022-04-06 20:33:10,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:10,999 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 193 transitions. [2022-04-06 20:33:10,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 193 transitions. [2022-04-06 20:33:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:33:10,999 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:11,000 INFO L499 BasicCegarLoop]: trace histogram [21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:11,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:11,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 20:33:11,214 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:11,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:11,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2104430926, now seen corresponding path program 131 times [2022-04-06 20:33:11,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:11,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1538396559] [2022-04-06 20:33:11,215 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:11,215 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:11,215 INFO L85 PathProgramCache]: Analyzing trace with hash 2104430926, now seen corresponding path program 132 times [2022-04-06 20:33:11,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:11,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818048125] [2022-04-06 20:33:11,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:11,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:11,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:33:11,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:11,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818048125] [2022-04-06 20:33:11,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818048125] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:11,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908269966] [2022-04-06 20:33:11,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:11,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:11,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:11,491 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:11,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 20:33:11,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:33:11,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:11,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:33:11,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:33:11,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:33:11,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908269966] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:11,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:11,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 6, 6] total 33 [2022-04-06 20:33:11,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:11,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1538396559] [2022-04-06 20:33:11,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1538396559] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:11,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:11,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:33:11,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753688914] [2022-04-06 20:33:11,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:11,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:33:11,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:33:11,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=980, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:33:11,744 INFO L87 Difference]: Start difference. First operand 150 states and 193 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:12,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:12,756 INFO L93 Difference]: Finished difference Result 235 states and 337 transitions. [2022-04-06 20:33:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:33:12,759 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 20:33:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:12,759 INFO L225 Difference]: With dead ends: 235 [2022-04-06 20:33:12,760 INFO L226 Difference]: Without dead ends: 227 [2022-04-06 20:33:12,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=3111, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:33:12,760 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 123 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 2574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:12,760 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 172 Invalid, 2574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:33:12,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-04-06 20:33:12,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 156. [2022-04-06 20:33:12,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.304635761589404) internal successors, (197), 151 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:12,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 201 transitions. [2022-04-06 20:33:12,807 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 201 transitions. Word has length 38 [2022-04-06 20:33:12,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:12,807 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 201 transitions. [2022-04-06 20:33:12,807 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:12,807 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 201 transitions. [2022-04-06 20:33:12,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:33:12,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:12,809 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:12,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:13,018 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-04-06 20:33:13,019 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:13,019 INFO L85 PathProgramCache]: Analyzing trace with hash 638163759, now seen corresponding path program 133 times [2022-04-06 20:33:13,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:13,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [74335554] [2022-04-06 20:33:13,020 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:13,020 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash 638163759, now seen corresponding path program 134 times [2022-04-06 20:33:13,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:13,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743486116] [2022-04-06 20:33:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:13,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:13,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:33:13,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:13,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743486116] [2022-04-06 20:33:13,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743486116] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:13,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755774704] [2022-04-06 20:33:13,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:13,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:13,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:13,181 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:13,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 20:33:13,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:13,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:13,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 20:33:13,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:33:13,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:33:13,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755774704] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:13,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:13,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 48 [2022-04-06 20:33:13,848 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:13,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [74335554] [2022-04-06 20:33:13,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [74335554] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:13,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:13,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:33:13,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165187224] [2022-04-06 20:33:13,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:13,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:33:13,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:13,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:33:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1902, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:33:13,849 INFO L87 Difference]: Start difference. First operand 156 states and 201 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:14,263 INFO L93 Difference]: Finished difference Result 170 states and 214 transitions. [2022-04-06 20:33:14,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:33:14,264 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 20:33:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:14,265 INFO L225 Difference]: With dead ends: 170 [2022-04-06 20:33:14,266 INFO L226 Difference]: Without dead ends: 145 [2022-04-06 20:33:14,266 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=678, Invalid=3612, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:33:14,266 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:14,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 106 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:33:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-04-06 20:33:14,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-04-06 20:33:14,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.3142857142857143) internal successors, (184), 140 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:14,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2022-04-06 20:33:14,331 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 39 [2022-04-06 20:33:14,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:14,331 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2022-04-06 20:33:14,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2022-04-06 20:33:14,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:33:14,332 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:14,332 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:14,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:14,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:14,548 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:14,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1865343295, now seen corresponding path program 135 times [2022-04-06 20:33:14,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:14,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [17150319] [2022-04-06 20:33:14,549 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:14,549 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:14,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1865343295, now seen corresponding path program 136 times [2022-04-06 20:33:14,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:14,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323130594] [2022-04-06 20:33:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:14,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:14,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:33:14,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:14,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323130594] [2022-04-06 20:33:14,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323130594] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:14,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672981807] [2022-04-06 20:33:14,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:14,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:14,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:14,720 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:14,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 20:33:14,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:14,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:14,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 20:33:14,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:33:14,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:33:15,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672981807] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:15,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:15,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 18] total 45 [2022-04-06 20:33:15,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:15,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [17150319] [2022-04-06 20:33:15,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [17150319] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:15,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:15,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:33:15,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305481111] [2022-04-06 20:33:15,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:15,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:33:15,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:15,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:33:15,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:33:15,388 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:15,863 INFO L93 Difference]: Finished difference Result 172 states and 215 transitions. [2022-04-06 20:33:15,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:33:15,863 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 20:33:15,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:15,864 INFO L225 Difference]: With dead ends: 172 [2022-04-06 20:33:15,864 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 20:33:15,865 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=430, Invalid=3476, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:33:15,865 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:15,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 78 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:33:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 20:33:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 146. [2022-04-06 20:33:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.3120567375886525) internal successors, (185), 141 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 189 transitions. [2022-04-06 20:33:15,895 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 189 transitions. Word has length 39 [2022-04-06 20:33:15,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:15,895 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 189 transitions. [2022-04-06 20:33:15,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:15,895 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 189 transitions. [2022-04-06 20:33:15,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:33:15,896 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:15,896 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:15,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:16,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:16,111 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:16,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:16,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1135246993, now seen corresponding path program 137 times [2022-04-06 20:33:16,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:16,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [123113138] [2022-04-06 20:33:16,112 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:16,112 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:16,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1135246993, now seen corresponding path program 138 times [2022-04-06 20:33:16,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:16,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455192192] [2022-04-06 20:33:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:16,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:16,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:16,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:16,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455192192] [2022-04-06 20:33:16,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455192192] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:16,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413111345] [2022-04-06 20:33:16,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:16,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:16,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:16,281 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:16,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 20:33:16,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:33:16,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:16,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:33:16,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:16,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:16,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413111345] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:16,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:16,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:33:16,775 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:16,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [123113138] [2022-04-06 20:33:16,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [123113138] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:16,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:16,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:33:16,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251171067] [2022-04-06 20:33:16,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:16,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:33:16,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:16,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:33:16,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:33:16,777 INFO L87 Difference]: Start difference. First operand 146 states and 189 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:17,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:17,148 INFO L93 Difference]: Finished difference Result 175 states and 218 transitions. [2022-04-06 20:33:17,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:33:17,149 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 20:33:17,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:17,149 INFO L225 Difference]: With dead ends: 175 [2022-04-06 20:33:17,149 INFO L226 Difference]: Without dead ends: 159 [2022-04-06 20:33:17,157 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=662, Invalid=2878, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:33:17,157 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:17,157 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 100 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:17,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-06 20:33:17,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 147. [2022-04-06 20:33:17,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.3098591549295775) internal successors, (186), 142 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:17,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 190 transitions. [2022-04-06 20:33:17,216 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 190 transitions. Word has length 39 [2022-04-06 20:33:17,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:17,216 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 190 transitions. [2022-04-06 20:33:17,216 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:17,216 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 190 transitions. [2022-04-06 20:33:17,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:33:17,216 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:17,216 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:17,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:17,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:17,432 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:17,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:17,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1958069505, now seen corresponding path program 139 times [2022-04-06 20:33:17,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:17,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [282788040] [2022-04-06 20:33:17,433 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:17,433 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:17,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1958069505, now seen corresponding path program 140 times [2022-04-06 20:33:17,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:17,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977906897] [2022-04-06 20:33:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:17,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:17,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:17,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:17,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977906897] [2022-04-06 20:33:17,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977906897] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:17,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022484215] [2022-04-06 20:33:17,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:17,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:17,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:17,615 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:17,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 20:33:17,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:17,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:17,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:33:17,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:17,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:18,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022484215] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:18,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:18,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:33:18,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:18,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [282788040] [2022-04-06 20:33:18,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [282788040] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:18,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:18,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:33:18,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232450250] [2022-04-06 20:33:18,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:18,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:33:18,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:18,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:33:18,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:33:18,031 INFO L87 Difference]: Start difference. First operand 147 states and 190 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:18,475 INFO L93 Difference]: Finished difference Result 178 states and 221 transitions. [2022-04-06 20:33:18,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:33:18,475 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 20:33:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:18,475 INFO L225 Difference]: With dead ends: 178 [2022-04-06 20:33:18,475 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 20:33:18,476 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=631, Invalid=2561, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:33:18,476 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:18,476 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 97 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 20:33:18,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 148. [2022-04-06 20:33:18,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.3076923076923077) internal successors, (187), 143 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 191 transitions. [2022-04-06 20:33:18,528 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 191 transitions. Word has length 39 [2022-04-06 20:33:18,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:18,528 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 191 transitions. [2022-04-06 20:33:18,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:18,528 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 191 transitions. [2022-04-06 20:33:18,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:33:18,543 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:18,543 INFO L499 BasicCegarLoop]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:18,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:18,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-04-06 20:33:18,759 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:18,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash 269298095, now seen corresponding path program 141 times [2022-04-06 20:33:18,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:18,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1809636497] [2022-04-06 20:33:18,760 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:18,760 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:18,760 INFO L85 PathProgramCache]: Analyzing trace with hash 269298095, now seen corresponding path program 142 times [2022-04-06 20:33:18,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:18,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646867413] [2022-04-06 20:33:18,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:18,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:19,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:33:19,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:19,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646867413] [2022-04-06 20:33:19,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646867413] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:19,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755309730] [2022-04-06 20:33:19,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:19,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:19,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:19,107 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:19,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 20:33:19,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:19,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:19,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 20:33:19,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:33:19,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:33:19,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755309730] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:19,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:19,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 20:33:19,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:19,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1809636497] [2022-04-06 20:33:19,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1809636497] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:19,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:19,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:33:19,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5058710] [2022-04-06 20:33:19,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:19,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:33:19,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:19,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:33:19,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=2222, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:33:19,798 INFO L87 Difference]: Start difference. First operand 148 states and 191 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:20,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:20,896 INFO L93 Difference]: Finished difference Result 234 states and 337 transitions. [2022-04-06 20:33:20,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:33:20,896 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 20:33:20,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:20,897 INFO L225 Difference]: With dead ends: 234 [2022-04-06 20:33:20,897 INFO L226 Difference]: Without dead ends: 226 [2022-04-06 20:33:20,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1354, Invalid=4966, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:33:20,898 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 123 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2634 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:20,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 177 Invalid, 2733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2634 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:33:20,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-04-06 20:33:20,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 154. [2022-04-06 20:33:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.308724832214765) internal successors, (195), 149 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2022-04-06 20:33:20,950 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 39 [2022-04-06 20:33:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:20,950 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2022-04-06 20:33:20,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:20,960 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2022-04-06 20:33:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:33:20,960 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:20,960 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:21,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:21,176 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:21,176 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:21,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:21,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1413810305, now seen corresponding path program 143 times [2022-04-06 20:33:21,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:21,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1492280899] [2022-04-06 20:33:21,177 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:21,177 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:21,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1413810305, now seen corresponding path program 144 times [2022-04-06 20:33:21,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:21,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330981242] [2022-04-06 20:33:21,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:21,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:21,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:33:21,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:21,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330981242] [2022-04-06 20:33:21,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330981242] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:21,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716061688] [2022-04-06 20:33:21,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:21,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:21,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:21,428 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:21,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 20:33:21,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:33:21,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:21,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 20:33:21,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:33:21,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:33:22,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716061688] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:22,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:22,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 49 [2022-04-06 20:33:22,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:22,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1492280899] [2022-04-06 20:33:22,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1492280899] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:22,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:22,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:33:22,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59468983] [2022-04-06 20:33:22,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:22,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:33:22,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:22,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:33:22,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2057, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:33:22,438 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:22,997 INFO L93 Difference]: Finished difference Result 181 states and 226 transitions. [2022-04-06 20:33:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:33:22,997 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 20:33:22,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:22,998 INFO L225 Difference]: With dead ends: 181 [2022-04-06 20:33:22,998 INFO L226 Difference]: Without dead ends: 166 [2022-04-06 20:33:22,998 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=497, Invalid=4059, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:33:22,999 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:23,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 103 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:23,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-04-06 20:33:23,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2022-04-06 20:33:23,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.3066666666666666) internal successors, (196), 150 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 200 transitions. [2022-04-06 20:33:23,034 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 200 transitions. Word has length 40 [2022-04-06 20:33:23,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:23,034 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 200 transitions. [2022-04-06 20:33:23,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:23,034 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 200 transitions. [2022-04-06 20:33:23,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:33:23,035 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:23,035 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:23,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-04-06 20:33:23,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:23,251 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:23,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:23,251 INFO L85 PathProgramCache]: Analyzing trace with hash -44794227, now seen corresponding path program 145 times [2022-04-06 20:33:23,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:23,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [117708525] [2022-04-06 20:33:23,252 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:23,252 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:23,252 INFO L85 PathProgramCache]: Analyzing trace with hash -44794227, now seen corresponding path program 146 times [2022-04-06 20:33:23,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:23,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037885719] [2022-04-06 20:33:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:23,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:23,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:23,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:23,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037885719] [2022-04-06 20:33:23,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037885719] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:23,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750823192] [2022-04-06 20:33:23,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:23,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:23,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:23,431 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:23,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 20:33:23,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:23,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:23,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:33:23,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:23,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:23,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750823192] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:23,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:23,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:33:23,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:23,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [117708525] [2022-04-06 20:33:23,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [117708525] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:23,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:23,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:33:23,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796501954] [2022-04-06 20:33:23,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:23,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:33:23,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:23,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:33:23,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:33:23,904 INFO L87 Difference]: Start difference. First operand 155 states and 200 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:24,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:24,535 INFO L93 Difference]: Finished difference Result 184 states and 229 transitions. [2022-04-06 20:33:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:33:24,536 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 20:33:24,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:24,536 INFO L225 Difference]: With dead ends: 184 [2022-04-06 20:33:24,536 INFO L226 Difference]: Without dead ends: 168 [2022-04-06 20:33:24,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=730, Invalid=3302, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:33:24,537 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:24,537 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:24,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-04-06 20:33:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 156. [2022-04-06 20:33:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.304635761589404) internal successors, (197), 151 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 201 transitions. [2022-04-06 20:33:24,589 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 201 transitions. Word has length 40 [2022-04-06 20:33:24,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:24,589 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 201 transitions. [2022-04-06 20:33:24,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 201 transitions. [2022-04-06 20:33:24,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:33:24,590 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:24,590 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:24,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:24,813 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-06 20:33:24,813 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:24,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:24,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1351548287, now seen corresponding path program 147 times [2022-04-06 20:33:24,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:24,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [151187679] [2022-04-06 20:33:24,814 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:24,814 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:24,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1351548287, now seen corresponding path program 148 times [2022-04-06 20:33:24,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:24,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594194057] [2022-04-06 20:33:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:24,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:24,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:24,964 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:24,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:24,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594194057] [2022-04-06 20:33:24,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594194057] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:24,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520496545] [2022-04-06 20:33:24,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:24,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:24,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:24,966 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:24,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 20:33:25,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:25,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:25,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:33:25,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:25,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:25,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520496545] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:25,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:25,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:33:25,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:25,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [151187679] [2022-04-06 20:33:25,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [151187679] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:25,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:25,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:33:25,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979684936] [2022-04-06 20:33:25,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:25,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:33:25,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:25,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:33:25,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:33:25,397 INFO L87 Difference]: Start difference. First operand 156 states and 201 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:25,912 INFO L93 Difference]: Finished difference Result 187 states and 232 transitions. [2022-04-06 20:33:25,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:33:25,912 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 20:33:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:25,913 INFO L225 Difference]: With dead ends: 187 [2022-04-06 20:33:25,913 INFO L226 Difference]: Without dead ends: 170 [2022-04-06 20:33:25,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=728, Invalid=3054, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:33:25,914 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:25,915 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 87 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:25,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-04-06 20:33:25,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 157. [2022-04-06 20:33:25,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.3026315789473684) internal successors, (198), 152 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 202 transitions. [2022-04-06 20:33:25,958 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 202 transitions. Word has length 40 [2022-04-06 20:33:25,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:25,958 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 202 transitions. [2022-04-06 20:33:25,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 202 transitions. [2022-04-06 20:33:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:33:25,959 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:25,959 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:25,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:26,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-04-06 20:33:26,175 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:26,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:26,175 INFO L85 PathProgramCache]: Analyzing trace with hash -605310835, now seen corresponding path program 149 times [2022-04-06 20:33:26,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:26,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2058704796] [2022-04-06 20:33:26,176 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:26,176 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:26,176 INFO L85 PathProgramCache]: Analyzing trace with hash -605310835, now seen corresponding path program 150 times [2022-04-06 20:33:26,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:26,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953141803] [2022-04-06 20:33:26,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:26,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:26,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:33:26,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:26,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953141803] [2022-04-06 20:33:26,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953141803] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:26,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494373256] [2022-04-06 20:33:26,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:26,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:26,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:26,369 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:26,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 20:33:26,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:33:26,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:26,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:33:26,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:33:26,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:33:27,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494373256] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:27,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:27,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:33:27,045 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:27,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2058704796] [2022-04-06 20:33:27,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2058704796] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:27,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:27,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:33:27,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566393254] [2022-04-06 20:33:27,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:27,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:33:27,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:27,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:33:27,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:33:27,046 INFO L87 Difference]: Start difference. First operand 157 states and 202 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:27,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:27,467 INFO L93 Difference]: Finished difference Result 190 states and 235 transitions. [2022-04-06 20:33:27,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:33:27,467 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 20:33:27,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:27,467 INFO L225 Difference]: With dead ends: 190 [2022-04-06 20:33:27,467 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 20:33:27,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=606, Invalid=2364, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:33:27,468 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:27,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 93 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:27,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 20:33:27,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2022-04-06 20:33:27,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.3006535947712419) internal successors, (199), 153 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:27,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 203 transitions. [2022-04-06 20:33:27,522 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 203 transitions. Word has length 40 [2022-04-06 20:33:27,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:27,522 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 203 transitions. [2022-04-06 20:33:27,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:27,523 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 203 transitions. [2022-04-06 20:33:27,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:33:27,523 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:27,523 INFO L499 BasicCegarLoop]: trace histogram [23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:27,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:27,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:27,727 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:27,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:27,727 INFO L85 PathProgramCache]: Analyzing trace with hash -785244818, now seen corresponding path program 151 times [2022-04-06 20:33:27,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:27,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1682096710] [2022-04-06 20:33:27,728 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:27,728 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:27,728 INFO L85 PathProgramCache]: Analyzing trace with hash -785244818, now seen corresponding path program 152 times [2022-04-06 20:33:27,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:27,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604090632] [2022-04-06 20:33:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:27,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:28,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:33:28,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:28,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604090632] [2022-04-06 20:33:28,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604090632] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:28,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770746126] [2022-04-06 20:33:28,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:28,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:28,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:28,108 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:28,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 20:33:28,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:28,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:28,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:33:28,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:33:28,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:33:29,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770746126] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:29,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:29,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 20:33:29,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:29,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1682096710] [2022-04-06 20:33:29,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1682096710] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:29,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:29,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:33:29,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646905506] [2022-04-06 20:33:29,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:29,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:33:29,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:29,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:33:29,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=2389, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:33:29,063 INFO L87 Difference]: Start difference. First operand 158 states and 203 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:30,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:30,439 INFO L93 Difference]: Finished difference Result 245 states and 351 transitions. [2022-04-06 20:33:30,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:33:30,440 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 20:33:30,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:30,440 INFO L225 Difference]: With dead ends: 245 [2022-04-06 20:33:30,440 INFO L226 Difference]: Without dead ends: 237 [2022-04-06 20:33:30,441 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1459, Invalid=5347, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:33:30,441 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 131 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:30,441 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 185 Invalid, 2997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2894 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:33:30,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-04-06 20:33:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 164. [2022-04-06 20:33:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.3018867924528301) internal successors, (207), 159 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 211 transitions. [2022-04-06 20:33:30,484 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 211 transitions. Word has length 40 [2022-04-06 20:33:30,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:30,484 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 211 transitions. [2022-04-06 20:33:30,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:30,484 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 211 transitions. [2022-04-06 20:33:30,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:33:30,484 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:30,484 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:30,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:30,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:30,700 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:30,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:30,700 INFO L85 PathProgramCache]: Analyzing trace with hash 11643199, now seen corresponding path program 153 times [2022-04-06 20:33:30,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:30,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1812026270] [2022-04-06 20:33:30,701 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:30,701 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:30,701 INFO L85 PathProgramCache]: Analyzing trace with hash 11643199, now seen corresponding path program 154 times [2022-04-06 20:33:30,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:30,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585909776] [2022-04-06 20:33:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:30,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:30,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:33:30,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:30,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585909776] [2022-04-06 20:33:30,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585909776] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:30,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860596601] [2022-04-06 20:33:30,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:30,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:30,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:30,896 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:30,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 20:33:30,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:30,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:30,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 20:33:30,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:33:31,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:33:31,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860596601] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:31,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:31,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 17 [2022-04-06 20:33:31,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:31,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1812026270] [2022-04-06 20:33:31,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1812026270] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:31,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:31,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:33:31,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16828828] [2022-04-06 20:33:31,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:31,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:33:31,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:31,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:33:31,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:33:31,139 INFO L87 Difference]: Start difference. First operand 164 states and 211 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:31,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:31,716 INFO L93 Difference]: Finished difference Result 485 states and 645 transitions. [2022-04-06 20:33:31,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:33:31,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:33:31,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:31,717 INFO L225 Difference]: With dead ends: 485 [2022-04-06 20:33:31,718 INFO L226 Difference]: Without dead ends: 470 [2022-04-06 20:33:31,718 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:33:31,718 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 38 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:31,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 100 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:31,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-04-06 20:33:31,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 168. [2022-04-06 20:33:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.3067484662576687) internal successors, (213), 163 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:31,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 217 transitions. [2022-04-06 20:33:31,766 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 217 transitions. Word has length 41 [2022-04-06 20:33:31,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:31,766 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 217 transitions. [2022-04-06 20:33:31,766 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:31,766 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 217 transitions. [2022-04-06 20:33:31,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:33:31,767 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:31,767 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:31,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:31,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-04-06 20:33:31,975 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:31,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:31,976 INFO L85 PathProgramCache]: Analyzing trace with hash -600496849, now seen corresponding path program 155 times [2022-04-06 20:33:31,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:31,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1094117442] [2022-04-06 20:33:31,976 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:31,976 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:31,976 INFO L85 PathProgramCache]: Analyzing trace with hash -600496849, now seen corresponding path program 156 times [2022-04-06 20:33:31,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:31,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096876367] [2022-04-06 20:33:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:31,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:32,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:32,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:32,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096876367] [2022-04-06 20:33:32,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096876367] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:32,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585700166] [2022-04-06 20:33:32,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:32,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:32,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:32,149 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:32,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 20:33:32,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:33:32,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:32,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 20:33:32,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:32,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 20:33:32,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585700166] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:32,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:32,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 18] total 46 [2022-04-06 20:33:32,774 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:32,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1094117442] [2022-04-06 20:33:32,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1094117442] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:32,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:32,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:33:32,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998664760] [2022-04-06 20:33:32,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:32,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:33:32,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:32,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:33:32,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1813, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:33:32,781 INFO L87 Difference]: Start difference. First operand 168 states and 217 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:33,331 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2022-04-06 20:33:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:33:33,332 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:33:33,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:33,332 INFO L225 Difference]: With dead ends: 197 [2022-04-06 20:33:33,332 INFO L226 Difference]: Without dead ends: 181 [2022-04-06 20:33:33,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=542, Invalid=4570, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:33:33,336 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:33,336 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 105 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-04-06 20:33:33,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 169. [2022-04-06 20:33:33,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.3048780487804879) internal successors, (214), 164 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:33,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 218 transitions. [2022-04-06 20:33:33,377 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 218 transitions. Word has length 41 [2022-04-06 20:33:33,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:33,377 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 218 transitions. [2022-04-06 20:33:33,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:33,377 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 218 transitions. [2022-04-06 20:33:33,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:33:33,377 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:33,377 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:33,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-04-06 20:33:33,580 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:33,581 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:33,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:33,581 INFO L85 PathProgramCache]: Analyzing trace with hash 870484735, now seen corresponding path program 157 times [2022-04-06 20:33:33,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:33,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2135648638] [2022-04-06 20:33:33,582 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:33,582 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:33,582 INFO L85 PathProgramCache]: Analyzing trace with hash 870484735, now seen corresponding path program 158 times [2022-04-06 20:33:33,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:33,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606182673] [2022-04-06 20:33:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:33,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:33,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:33,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:33,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606182673] [2022-04-06 20:33:33,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606182673] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:33,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850585644] [2022-04-06 20:33:33,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:33,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:33,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:33,803 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:33,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 20:33:33,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:33,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:33,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:33:33,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:33,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:34,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850585644] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:34,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:34,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:33:34,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:34,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2135648638] [2022-04-06 20:33:34,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2135648638] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:34,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:34,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:33:34,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537812282] [2022-04-06 20:33:34,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:34,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:33:34,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:34,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:33:34,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:33:34,407 INFO L87 Difference]: Start difference. First operand 169 states and 218 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:35,082 INFO L93 Difference]: Finished difference Result 200 states and 249 transitions. [2022-04-06 20:33:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:33:35,083 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:33:35,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:35,083 INFO L225 Difference]: With dead ends: 200 [2022-04-06 20:33:35,083 INFO L226 Difference]: Without dead ends: 183 [2022-04-06 20:33:35,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=833, Invalid=3589, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:33:35,084 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:35,084 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 102 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:33:35,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-04-06 20:33:35,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 170. [2022-04-06 20:33:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.303030303030303) internal successors, (215), 165 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:35,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 219 transitions. [2022-04-06 20:33:35,129 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 219 transitions. Word has length 41 [2022-04-06 20:33:35,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:35,129 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 219 transitions. [2022-04-06 20:33:35,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:35,129 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 219 transitions. [2022-04-06 20:33:35,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:33:35,130 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:35,130 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:35,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-04-06 20:33:35,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:35,346 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:35,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:35,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1132790639, now seen corresponding path program 159 times [2022-04-06 20:33:35,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:35,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1453650873] [2022-04-06 20:33:35,347 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:35,347 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:35,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1132790639, now seen corresponding path program 160 times [2022-04-06 20:33:35,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:35,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380877382] [2022-04-06 20:33:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:35,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:35,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:33:35,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:35,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380877382] [2022-04-06 20:33:35,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380877382] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:35,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303761457] [2022-04-06 20:33:35,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:35,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:35,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:35,496 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:35,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 20:33:35,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:35,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:35,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:33:35,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:35,595 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:33:35,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:33:35,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303761457] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:35,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:35,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:33:35,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:35,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1453650873] [2022-04-06 20:33:35,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1453650873] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:35,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:35,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:33:35,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344703923] [2022-04-06 20:33:35,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:35,906 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:33:35,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:35,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:33:35,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:33:35,907 INFO L87 Difference]: Start difference. First operand 170 states and 219 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:36,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:36,532 INFO L93 Difference]: Finished difference Result 203 states and 252 transitions. [2022-04-06 20:33:36,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:33:36,533 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:33:36,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:36,533 INFO L225 Difference]: With dead ends: 203 [2022-04-06 20:33:36,533 INFO L226 Difference]: Without dead ends: 185 [2022-04-06 20:33:36,534 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=721, Invalid=2939, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:33:36,534 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:36,534 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 94 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:36,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-04-06 20:33:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 171. [2022-04-06 20:33:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.3012048192771084) internal successors, (216), 166 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 220 transitions. [2022-04-06 20:33:36,575 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 220 transitions. Word has length 41 [2022-04-06 20:33:36,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:36,575 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 220 transitions. [2022-04-06 20:33:36,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 220 transitions. [2022-04-06 20:33:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:33:36,576 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:36,576 INFO L499 BasicCegarLoop]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:36,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-04-06 20:33:36,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-04-06 20:33:36,792 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:36,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:36,792 INFO L85 PathProgramCache]: Analyzing trace with hash 883663247, now seen corresponding path program 161 times [2022-04-06 20:33:36,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:36,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1313941312] [2022-04-06 20:33:36,793 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:36,793 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:36,793 INFO L85 PathProgramCache]: Analyzing trace with hash 883663247, now seen corresponding path program 162 times [2022-04-06 20:33:36,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:36,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161606146] [2022-04-06 20:33:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:36,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:37,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:33:37,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:37,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161606146] [2022-04-06 20:33:37,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161606146] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:37,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615703762] [2022-04-06 20:33:37,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:37,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:37,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:37,074 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:37,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 20:33:37,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:33:37,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:37,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:33:37,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:33:37,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:33:37,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615703762] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:37,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:37,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 6, 6] total 36 [2022-04-06 20:33:37,306 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:37,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1313941312] [2022-04-06 20:33:37,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1313941312] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:37,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:37,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:33:37,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401134473] [2022-04-06 20:33:37,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:37,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:33:37,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:37,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:33:37,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1178, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:33:37,307 INFO L87 Difference]: Start difference. First operand 171 states and 220 transitions. Second operand has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:38,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:38,488 INFO L93 Difference]: Finished difference Result 270 states and 390 transitions. [2022-04-06 20:33:38,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:33:38,489 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:33:38,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:38,489 INFO L225 Difference]: With dead ends: 270 [2022-04-06 20:33:38,489 INFO L226 Difference]: Without dead ends: 262 [2022-04-06 20:33:38,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=3819, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:33:38,491 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 139 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 3050 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 3157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 3050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:38,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 188 Invalid, 3157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 3050 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:33:38,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-04-06 20:33:38,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 177. [2022-04-06 20:33:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.302325581395349) internal successors, (224), 172 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 228 transitions. [2022-04-06 20:33:38,534 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 228 transitions. Word has length 41 [2022-04-06 20:33:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:38,534 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 228 transitions. [2022-04-06 20:33:38,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:38,534 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 228 transitions. [2022-04-06 20:33:38,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:33:38,534 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:38,534 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:38,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-04-06 20:33:38,737 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:38,737 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:38,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1251028863, now seen corresponding path program 163 times [2022-04-06 20:33:38,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:38,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [885258324] [2022-04-06 20:33:38,738 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:38,738 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:38,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1251028863, now seen corresponding path program 164 times [2022-04-06 20:33:38,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:38,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818471820] [2022-04-06 20:33:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:38,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:38,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:33:38,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:38,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818471820] [2022-04-06 20:33:38,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818471820] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:38,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697519101] [2022-04-06 20:33:38,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:38,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:38,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:38,997 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:38,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 20:33:39,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:39,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:39,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 20:33:39,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:33:39,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:33:39,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697519101] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:39,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:39,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 53 [2022-04-06 20:33:39,838 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:39,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [885258324] [2022-04-06 20:33:39,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [885258324] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:39,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:39,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:33:39,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618377403] [2022-04-06 20:33:39,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:39,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:33:39,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:39,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:33:39,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2333, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:33:39,839 INFO L87 Difference]: Start difference. First operand 177 states and 228 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:40,375 INFO L93 Difference]: Finished difference Result 192 states and 242 transitions. [2022-04-06 20:33:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:33:40,375 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:33:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:40,376 INFO L225 Difference]: With dead ends: 192 [2022-04-06 20:33:40,376 INFO L226 Difference]: Without dead ends: 165 [2022-04-06 20:33:40,376 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=813, Invalid=4443, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:33:40,376 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:40,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 116 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-04-06 20:33:40,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-04-06 20:33:40,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.3125) internal successors, (210), 160 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 214 transitions. [2022-04-06 20:33:40,416 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 214 transitions. Word has length 42 [2022-04-06 20:33:40,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:40,416 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 214 transitions. [2022-04-06 20:33:40,416 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:40,416 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 214 transitions. [2022-04-06 20:33:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:33:40,416 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:40,416 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:40,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-04-06 20:33:40,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:40,622 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:40,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:40,622 INFO L85 PathProgramCache]: Analyzing trace with hash -647408947, now seen corresponding path program 165 times [2022-04-06 20:33:40,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:40,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [508974020] [2022-04-06 20:33:40,623 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:40,623 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:40,623 INFO L85 PathProgramCache]: Analyzing trace with hash -647408947, now seen corresponding path program 166 times [2022-04-06 20:33:40,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:40,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341091674] [2022-04-06 20:33:40,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:40,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:40,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:40,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:40,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341091674] [2022-04-06 20:33:40,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341091674] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:40,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403425072] [2022-04-06 20:33:40,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:40,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:40,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:40,862 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:40,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 20:33:40,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:40,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:40,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 20:33:40,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:41,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 18 proven. 72 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:33:41,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403425072] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:41,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:41,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 20] total 50 [2022-04-06 20:33:41,672 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:41,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [508974020] [2022-04-06 20:33:41,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [508974020] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:41,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:41,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:33:41,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667760592] [2022-04-06 20:33:41,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:41,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:33:41,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:41,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:33:41,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2150, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:33:41,673 INFO L87 Difference]: Start difference. First operand 165 states and 214 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:42,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:42,348 INFO L93 Difference]: Finished difference Result 194 states and 243 transitions. [2022-04-06 20:33:42,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:33:42,348 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:33:42,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:42,349 INFO L225 Difference]: With dead ends: 194 [2022-04-06 20:33:42,349 INFO L226 Difference]: Without dead ends: 178 [2022-04-06 20:33:42,349 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=508, Invalid=4322, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:33:42,349 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:42,349 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 98 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:42,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-04-06 20:33:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2022-04-06 20:33:42,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.31055900621118) internal successors, (211), 161 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:42,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 215 transitions. [2022-04-06 20:33:42,389 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 215 transitions. Word has length 42 [2022-04-06 20:33:42,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:42,389 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 215 transitions. [2022-04-06 20:33:42,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:42,390 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 215 transitions. [2022-04-06 20:33:42,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:33:42,390 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:42,390 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:42,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:42,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-04-06 20:33:42,603 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:42,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:42,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1157583489, now seen corresponding path program 167 times [2022-04-06 20:33:42,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:42,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [997806978] [2022-04-06 20:33:42,605 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:42,605 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:42,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1157583489, now seen corresponding path program 168 times [2022-04-06 20:33:42,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:42,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026376231] [2022-04-06 20:33:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:42,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:42,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:42,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:42,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026376231] [2022-04-06 20:33:42,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026376231] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:42,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512107709] [2022-04-06 20:33:42,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:42,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:42,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:42,825 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:42,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 20:33:43,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:33:43,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:43,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:33:43,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:43,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:43,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512107709] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:43,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:43,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:33:43,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:43,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [997806978] [2022-04-06 20:33:43,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [997806978] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:43,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:43,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:33:43,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061440666] [2022-04-06 20:33:43,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:43,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:33:43,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:43,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:33:43,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:33:43,667 INFO L87 Difference]: Start difference. First operand 166 states and 215 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:44,366 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2022-04-06 20:33:44,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:33:44,366 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:33:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:44,367 INFO L225 Difference]: With dead ends: 197 [2022-04-06 20:33:44,367 INFO L226 Difference]: Without dead ends: 180 [2022-04-06 20:33:44,368 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=803, Invalid=3619, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:33:44,368 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:44,368 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 110 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:33:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-04-06 20:33:44,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2022-04-06 20:33:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.308641975308642) internal successors, (212), 162 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 216 transitions. [2022-04-06 20:33:44,407 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 216 transitions. Word has length 42 [2022-04-06 20:33:44,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:44,407 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 216 transitions. [2022-04-06 20:33:44,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:44,407 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 216 transitions. [2022-04-06 20:33:44,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:33:44,407 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:44,408 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:44,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-04-06 20:33:44,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:44,608 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:44,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:44,608 INFO L85 PathProgramCache]: Analyzing trace with hash -820638515, now seen corresponding path program 169 times [2022-04-06 20:33:44,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:44,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [662871449] [2022-04-06 20:33:44,609 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:44,609 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:44,609 INFO L85 PathProgramCache]: Analyzing trace with hash -820638515, now seen corresponding path program 170 times [2022-04-06 20:33:44,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:44,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945465080] [2022-04-06 20:33:44,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:44,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:44,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:33:44,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:44,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945465080] [2022-04-06 20:33:44,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945465080] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:44,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013997530] [2022-04-06 20:33:44,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:44,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:44,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:44,824 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:44,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 20:33:44,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:44,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:44,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:33:44,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:33:44,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:33:45,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013997530] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:45,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:45,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:33:45,284 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:45,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [662871449] [2022-04-06 20:33:45,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [662871449] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:45,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:45,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:33:45,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709647064] [2022-04-06 20:33:45,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:45,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:33:45,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:45,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:33:45,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1284, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:33:45,285 INFO L87 Difference]: Start difference. First operand 167 states and 216 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:45,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:45,837 INFO L93 Difference]: Finished difference Result 200 states and 249 transitions. [2022-04-06 20:33:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:33:45,837 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:33:45,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:45,838 INFO L225 Difference]: With dead ends: 200 [2022-04-06 20:33:45,838 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 20:33:45,839 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=798, Invalid=3362, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:33:45,839 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:45,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 107 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:45,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 20:33:45,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 168. [2022-04-06 20:33:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.3067484662576687) internal successors, (213), 163 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:45,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 217 transitions. [2022-04-06 20:33:45,888 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 217 transitions. Word has length 42 [2022-04-06 20:33:45,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:45,888 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 217 transitions. [2022-04-06 20:33:45,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:45,888 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 217 transitions. [2022-04-06 20:33:45,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:33:45,888 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:45,888 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:45,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-04-06 20:33:46,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:46,103 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:46,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:46,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1353729153, now seen corresponding path program 171 times [2022-04-06 20:33:46,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:46,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1550251880] [2022-04-06 20:33:46,104 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:46,104 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:46,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1353729153, now seen corresponding path program 172 times [2022-04-06 20:33:46,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:46,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774972384] [2022-04-06 20:33:46,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:46,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:46,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:33:46,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:46,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774972384] [2022-04-06 20:33:46,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774972384] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:46,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97357081] [2022-04-06 20:33:46,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:46,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:46,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:46,281 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:46,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 20:33:46,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:46,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:46,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:33:46,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:33:46,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:33:46,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97357081] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:46,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:46,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:33:46,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:46,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1550251880] [2022-04-06 20:33:46,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1550251880] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:46,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:46,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:33:46,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168865706] [2022-04-06 20:33:46,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:46,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:33:46,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:46,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:33:46,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1125, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:33:46,696 INFO L87 Difference]: Start difference. First operand 168 states and 217 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:47,100 INFO L93 Difference]: Finished difference Result 203 states and 252 transitions. [2022-04-06 20:33:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:33:47,100 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:33:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:47,100 INFO L225 Difference]: With dead ends: 203 [2022-04-06 20:33:47,101 INFO L226 Difference]: Without dead ends: 184 [2022-04-06 20:33:47,101 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=674, Invalid=2632, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:33:47,101 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:47,101 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 98 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:47,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-04-06 20:33:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 169. [2022-04-06 20:33:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.3048780487804879) internal successors, (214), 164 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:47,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 218 transitions. [2022-04-06 20:33:47,142 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 218 transitions. Word has length 42 [2022-04-06 20:33:47,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:47,142 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 218 transitions. [2022-04-06 20:33:47,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:47,143 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 218 transitions. [2022-04-06 20:33:47,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:33:47,143 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:47,143 INFO L499 BasicCegarLoop]: trace histogram [25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:47,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-04-06 20:33:47,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:47,353 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:47,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:47,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1080205710, now seen corresponding path program 173 times [2022-04-06 20:33:47,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:47,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1899596906] [2022-04-06 20:33:47,354 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:47,354 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:47,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1080205710, now seen corresponding path program 174 times [2022-04-06 20:33:47,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:47,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572372786] [2022-04-06 20:33:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:47,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:47,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:33:47,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:47,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572372786] [2022-04-06 20:33:47,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572372786] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:47,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794741157] [2022-04-06 20:33:47,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:47,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:47,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:47,641 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:47,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 20:33:47,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:33:47,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:47,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:33:47,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 20:33:47,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 20:33:47,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794741157] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:47,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:47,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 6, 6] total 37 [2022-04-06 20:33:47,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:47,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1899596906] [2022-04-06 20:33:47,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1899596906] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:47,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:47,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:33:47,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640421504] [2022-04-06 20:33:47,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:47,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:33:47,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:47,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:33:47,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1248, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:33:47,852 INFO L87 Difference]: Start difference. First operand 169 states and 218 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:48,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:48,966 INFO L93 Difference]: Finished difference Result 269 states and 390 transitions. [2022-04-06 20:33:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:33:48,966 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:33:48,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:48,967 INFO L225 Difference]: With dead ends: 269 [2022-04-06 20:33:48,967 INFO L226 Difference]: Without dead ends: 261 [2022-04-06 20:33:48,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=4071, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:33:48,968 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 139 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3223 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 3334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:48,968 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 193 Invalid, 3334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3223 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:33:48,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-04-06 20:33:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 175. [2022-04-06 20:33:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.3058823529411765) internal successors, (222), 170 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 226 transitions. [2022-04-06 20:33:49,011 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 226 transitions. Word has length 42 [2022-04-06 20:33:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:49,011 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 226 transitions. [2022-04-06 20:33:49,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 226 transitions. [2022-04-06 20:33:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:33:49,012 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:49,012 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:49,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:49,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-04-06 20:33:49,228 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2101683985, now seen corresponding path program 175 times [2022-04-06 20:33:49,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:49,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1735078524] [2022-04-06 20:33:49,229 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:49,229 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:49,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2101683985, now seen corresponding path program 176 times [2022-04-06 20:33:49,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:49,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482378922] [2022-04-06 20:33:49,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:49,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:49,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:49,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:49,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482378922] [2022-04-06 20:33:49,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482378922] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:49,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996234385] [2022-04-06 20:33:49,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:49,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:49,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:49,413 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:49,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 20:33:49,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:49,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:49,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 20:33:49,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:49,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:50,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996234385] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:50,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:50,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 22] total 54 [2022-04-06 20:33:50,400 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:50,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1735078524] [2022-04-06 20:33:50,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1735078524] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:50,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:50,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:33:50,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831170486] [2022-04-06 20:33:50,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:50,401 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:33:50,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:50,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:33:50,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=2515, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:33:50,401 INFO L87 Difference]: Start difference. First operand 175 states and 226 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:50,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:50,937 INFO L93 Difference]: Finished difference Result 204 states and 255 transitions. [2022-04-06 20:33:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:33:50,938 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 20:33:50,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:50,938 INFO L225 Difference]: With dead ends: 204 [2022-04-06 20:33:50,938 INFO L226 Difference]: Without dead ends: 188 [2022-04-06 20:33:50,939 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=581, Invalid=4969, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:33:50,939 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:50,939 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 103 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:50,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-04-06 20:33:50,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 176. [2022-04-06 20:33:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.304093567251462) internal successors, (223), 171 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:50,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 227 transitions. [2022-04-06 20:33:50,988 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 227 transitions. Word has length 43 [2022-04-06 20:33:50,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:50,988 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 227 transitions. [2022-04-06 20:33:50,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:50,988 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 227 transitions. [2022-04-06 20:33:50,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:33:50,988 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:50,988 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:51,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:51,205 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:51,206 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:51,206 INFO L85 PathProgramCache]: Analyzing trace with hash 396811007, now seen corresponding path program 177 times [2022-04-06 20:33:51,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:51,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [929050258] [2022-04-06 20:33:51,207 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:51,207 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:51,207 INFO L85 PathProgramCache]: Analyzing trace with hash 396811007, now seen corresponding path program 178 times [2022-04-06 20:33:51,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:51,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483332976] [2022-04-06 20:33:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:51,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:51,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:51,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:51,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483332976] [2022-04-06 20:33:51,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483332976] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:51,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235527698] [2022-04-06 20:33:51,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:51,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:51,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:51,387 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:51,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 20:33:51,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:51,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:51,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:33:51,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:51,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:33:52,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235527698] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:52,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:52,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:33:52,066 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:52,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [929050258] [2022-04-06 20:33:52,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [929050258] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:52,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:52,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:33:52,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704827524] [2022-04-06 20:33:52,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:52,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:33:52,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:52,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:33:52,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1599, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:33:52,067 INFO L87 Difference]: Start difference. First operand 176 states and 227 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:52,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:52,753 INFO L93 Difference]: Finished difference Result 207 states and 258 transitions. [2022-04-06 20:33:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:33:52,753 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 20:33:52,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:52,754 INFO L225 Difference]: With dead ends: 207 [2022-04-06 20:33:52,754 INFO L226 Difference]: Without dead ends: 190 [2022-04-06 20:33:52,754 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=879, Invalid=4091, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:33:52,754 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:52,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:52,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-04-06 20:33:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 177. [2022-04-06 20:33:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.302325581395349) internal successors, (224), 172 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 228 transitions. [2022-04-06 20:33:52,799 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 228 transitions. Word has length 43 [2022-04-06 20:33:52,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:52,800 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 228 transitions. [2022-04-06 20:33:52,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:52,800 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 228 transitions. [2022-04-06 20:33:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:33:52,800 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:52,800 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:52,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:53,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:53,016 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:53,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1247400145, now seen corresponding path program 179 times [2022-04-06 20:33:53,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:53,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [573055533] [2022-04-06 20:33:53,017 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:53,017 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:53,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1247400145, now seen corresponding path program 180 times [2022-04-06 20:33:53,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:53,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525449268] [2022-04-06 20:33:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:53,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:53,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:33:53,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:53,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525449268] [2022-04-06 20:33:53,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525449268] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:53,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170796950] [2022-04-06 20:33:53,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:53,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:53,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:53,207 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:53,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 20:33:53,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:33:53,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:53,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:33:53,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:33:53,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:33:53,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170796950] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:53,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:53,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:33:53,891 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:53,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [573055533] [2022-04-06 20:33:53,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [573055533] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:53,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:53,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:33:53,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601334196] [2022-04-06 20:33:53,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:53,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:33:53,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:53,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:33:53,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1430, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:33:53,892 INFO L87 Difference]: Start difference. First operand 177 states and 228 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:54,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:54,434 INFO L93 Difference]: Finished difference Result 210 states and 261 transitions. [2022-04-06 20:33:54,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:33:54,434 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 20:33:54,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:54,435 INFO L225 Difference]: With dead ends: 210 [2022-04-06 20:33:54,435 INFO L226 Difference]: Without dead ends: 192 [2022-04-06 20:33:54,435 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=906, Invalid=3924, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:33:54,436 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:54,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 117 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:54,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-04-06 20:33:54,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 178. [2022-04-06 20:33:54,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.300578034682081) internal successors, (225), 173 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:54,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 229 transitions. [2022-04-06 20:33:54,486 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 229 transitions. Word has length 43 [2022-04-06 20:33:54,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:54,486 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 229 transitions. [2022-04-06 20:33:54,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:54,486 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 229 transitions. [2022-04-06 20:33:54,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:33:54,486 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:54,486 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:54,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:54,690 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:54,690 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:54,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:54,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1705851713, now seen corresponding path program 181 times [2022-04-06 20:33:54,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:54,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1960999194] [2022-04-06 20:33:54,691 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:54,691 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:54,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1705851713, now seen corresponding path program 182 times [2022-04-06 20:33:54,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:54,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843508241] [2022-04-06 20:33:54,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:54,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:54,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:33:54,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:54,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843508241] [2022-04-06 20:33:54,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843508241] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:54,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373048125] [2022-04-06 20:33:54,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:54,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:54,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:54,831 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:54,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 20:33:54,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:54,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:54,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:33:54,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:33:54,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:33:55,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373048125] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:55,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:55,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:33:55,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:55,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1960999194] [2022-04-06 20:33:55,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1960999194] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:55,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:55,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:33:55,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227531740] [2022-04-06 20:33:55,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:55,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:33:55,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:55,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:33:55,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1267, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:33:55,300 INFO L87 Difference]: Start difference. First operand 178 states and 229 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:55,765 INFO L93 Difference]: Finished difference Result 213 states and 264 transitions. [2022-04-06 20:33:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:33:55,765 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 20:33:55,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:55,766 INFO L225 Difference]: With dead ends: 213 [2022-04-06 20:33:55,766 INFO L226 Difference]: Without dead ends: 194 [2022-04-06 20:33:55,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=793, Invalid=3239, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:33:55,766 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:55,766 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 99 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:33:55,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-04-06 20:33:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 179. [2022-04-06 20:33:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.2988505747126438) internal successors, (226), 174 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 230 transitions. [2022-04-06 20:33:55,813 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 230 transitions. Word has length 43 [2022-04-06 20:33:55,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:55,813 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 230 transitions. [2022-04-06 20:33:55,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 230 transitions. [2022-04-06 20:33:55,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:33:55,814 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:55,814 INFO L499 BasicCegarLoop]: trace histogram [26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:55,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:56,022 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:56,023 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:56,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:56,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1416912529, now seen corresponding path program 183 times [2022-04-06 20:33:56,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:56,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1524787122] [2022-04-06 20:33:56,024 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:56,024 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:56,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1416912529, now seen corresponding path program 184 times [2022-04-06 20:33:56,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:56,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055950865] [2022-04-06 20:33:56,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:56,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:56,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:33:56,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:56,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055950865] [2022-04-06 20:33:56,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055950865] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:56,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183705020] [2022-04-06 20:33:56,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:56,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:56,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:56,497 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:56,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 20:33:56,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:56,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:56,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:33:56,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:33:56,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:33:57,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183705020] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:57,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:57,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 20:33:57,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:57,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1524787122] [2022-04-06 20:33:57,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1524787122] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:57,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:57,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:33:57,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602273701] [2022-04-06 20:33:57,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:57,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:33:57,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:57,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:33:57,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=856, Invalid=2926, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:33:57,481 INFO L87 Difference]: Start difference. First operand 179 states and 230 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:58,719 INFO L93 Difference]: Finished difference Result 280 states and 404 transitions. [2022-04-06 20:33:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:33:58,719 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 20:33:58,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:58,720 INFO L225 Difference]: With dead ends: 280 [2022-04-06 20:33:58,720 INFO L226 Difference]: Without dead ends: 272 [2022-04-06 20:33:58,721 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1798, Invalid=6574, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:33:58,721 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 147 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3633 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 3633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:58,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 206 Invalid, 3748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 3633 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:33:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-04-06 20:33:58,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 185. [2022-04-06 20:33:58,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.3) internal successors, (234), 180 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:58,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 238 transitions. [2022-04-06 20:33:58,768 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 238 transitions. Word has length 43 [2022-04-06 20:33:58,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:58,768 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 238 transitions. [2022-04-06 20:33:58,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:58,768 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 238 transitions. [2022-04-06 20:33:58,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:33:58,768 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:58,768 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:58,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:58,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-04-06 20:33:58,984 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:58,984 INFO L85 PathProgramCache]: Analyzing trace with hash 60430093, now seen corresponding path program 185 times [2022-04-06 20:33:58,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:58,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1985478138] [2022-04-06 20:33:58,986 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:58,986 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:58,986 INFO L85 PathProgramCache]: Analyzing trace with hash 60430093, now seen corresponding path program 186 times [2022-04-06 20:33:58,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:58,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136400064] [2022-04-06 20:33:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:58,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:59,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:59,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:59,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136400064] [2022-04-06 20:33:59,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136400064] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:59,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918979842] [2022-04-06 20:33:59,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:59,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:59,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:59,179 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:59,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 20:33:59,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:33:59,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:59,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:33:59,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:59,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:33:59,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918979842] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:59,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:59,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 18 [2022-04-06 20:33:59,621 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:59,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1985478138] [2022-04-06 20:33:59,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1985478138] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:59,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:59,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:33:59,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099737064] [2022-04-06 20:33:59,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:59,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:33:59,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:59,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:33:59,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:33:59,621 INFO L87 Difference]: Start difference. First operand 185 states and 238 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:00,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:00,376 INFO L93 Difference]: Finished difference Result 584 states and 780 transitions. [2022-04-06 20:34:00,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:34:00,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:34:00,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:00,378 INFO L225 Difference]: With dead ends: 584 [2022-04-06 20:34:00,378 INFO L226 Difference]: Without dead ends: 568 [2022-04-06 20:34:00,378 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:34:00,378 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 41 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:00,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 108 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:34:00,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-04-06 20:34:00,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 189. [2022-04-06 20:34:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.3043478260869565) internal successors, (240), 184 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:00,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 244 transitions. [2022-04-06 20:34:00,430 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 244 transitions. Word has length 44 [2022-04-06 20:34:00,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:00,430 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 244 transitions. [2022-04-06 20:34:00,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:00,430 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 244 transitions. [2022-04-06 20:34:00,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:34:00,430 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:00,430 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:00,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-04-06 20:34:00,633 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-04-06 20:34:00,634 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:00,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:00,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1338400127, now seen corresponding path program 187 times [2022-04-06 20:34:00,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:00,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1560398672] [2022-04-06 20:34:00,635 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:00,635 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:00,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1338400127, now seen corresponding path program 188 times [2022-04-06 20:34:00,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:00,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834644520] [2022-04-06 20:34:00,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:00,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:00,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:34:00,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:00,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834644520] [2022-04-06 20:34:00,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834644520] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:00,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245089414] [2022-04-06 20:34:00,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:34:00,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:00,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:00,919 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:00,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 20:34:00,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:34:00,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:00,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 20:34:00,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:34:01,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 20:34:01,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245089414] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:01,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:01,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 20] total 51 [2022-04-06 20:34:01,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:01,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1560398672] [2022-04-06 20:34:01,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1560398672] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:01,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:01,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:34:01,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616526502] [2022-04-06 20:34:01,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:01,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:34:01,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:01,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:34:01,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:34:01,675 INFO L87 Difference]: Start difference. First operand 189 states and 244 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:02,358 INFO L93 Difference]: Finished difference Result 220 states and 275 transitions. [2022-04-06 20:34:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:34:02,358 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:34:02,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:02,359 INFO L225 Difference]: With dead ends: 220 [2022-04-06 20:34:02,359 INFO L226 Difference]: Without dead ends: 203 [2022-04-06 20:34:02,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=642, Invalid=5678, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:34:02,360 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:02,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 120 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:34:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-04-06 20:34:02,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 190. [2022-04-06 20:34:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.3027027027027027) internal successors, (241), 185 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:02,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 245 transitions. [2022-04-06 20:34:02,411 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 245 transitions. Word has length 44 [2022-04-06 20:34:02,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:02,411 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 245 transitions. [2022-04-06 20:34:02,411 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:02,411 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 245 transitions. [2022-04-06 20:34:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:34:02,412 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:02,412 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:02,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-04-06 20:34:02,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:02,623 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:02,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1592108787, now seen corresponding path program 189 times [2022-04-06 20:34:02,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:02,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1890185026] [2022-04-06 20:34:02,624 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:02,624 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:02,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1592108787, now seen corresponding path program 190 times [2022-04-06 20:34:02,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:02,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855061511] [2022-04-06 20:34:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:02,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:02,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:34:02,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:02,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855061511] [2022-04-06 20:34:02,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855061511] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:02,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356146792] [2022-04-06 20:34:02,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:34:02,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:02,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:02,883 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:02,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 20:34:02,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:34:02,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:02,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:34:02,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:34:02,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:34:03,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356146792] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:03,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:03,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:34:03,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:03,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1890185026] [2022-04-06 20:34:03,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1890185026] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:03,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:03,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:34:03,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843493992] [2022-04-06 20:34:03,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:03,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:34:03,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:03,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:34:03,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:34:03,400 INFO L87 Difference]: Start difference. First operand 190 states and 245 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:03,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:03,984 INFO L93 Difference]: Finished difference Result 223 states and 278 transitions. [2022-04-06 20:34:03,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:34:03,984 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:34:03,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:03,985 INFO L225 Difference]: With dead ends: 223 [2022-04-06 20:34:03,985 INFO L226 Difference]: Without dead ends: 205 [2022-04-06 20:34:03,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1017, Invalid=4533, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:34:03,985 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:03,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 92 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:34:03,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-04-06 20:34:04,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 191. [2022-04-06 20:34:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.3010752688172043) internal successors, (242), 186 states have internal predecessors, (242), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 246 transitions. [2022-04-06 20:34:04,037 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 246 transitions. Word has length 44 [2022-04-06 20:34:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:04,037 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 246 transitions. [2022-04-06 20:34:04,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 246 transitions. [2022-04-06 20:34:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:34:04,038 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:04,038 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:04,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-04-06 20:34:04,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:04,251 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:04,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:04,251 INFO L85 PathProgramCache]: Analyzing trace with hash 263250815, now seen corresponding path program 191 times [2022-04-06 20:34:04,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:04,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [467991249] [2022-04-06 20:34:04,252 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:04,252 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:04,252 INFO L85 PathProgramCache]: Analyzing trace with hash 263250815, now seen corresponding path program 192 times [2022-04-06 20:34:04,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:04,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907801668] [2022-04-06 20:34:04,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:04,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:04,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:34:04,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:04,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907801668] [2022-04-06 20:34:04,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907801668] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:04,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118901181] [2022-04-06 20:34:04,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:34:04,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:04,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:04,509 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:04,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 20:34:05,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:34:05,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:05,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:34:05,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:34:05,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:34:05,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118901181] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:05,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:05,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:34:05,632 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:05,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [467991249] [2022-04-06 20:34:05,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [467991249] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:05,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:05,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:34:05,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946057835] [2022-04-06 20:34:05,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:05,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:34:05,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:05,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:34:05,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:34:05,633 INFO L87 Difference]: Start difference. First operand 191 states and 246 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:06,320 INFO L93 Difference]: Finished difference Result 226 states and 281 transitions. [2022-04-06 20:34:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:34:06,321 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:34:06,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:06,322 INFO L225 Difference]: With dead ends: 226 [2022-04-06 20:34:06,322 INFO L226 Difference]: Without dead ends: 207 [2022-04-06 20:34:06,322 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=924, Invalid=3906, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:34:06,322 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:06,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 114 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:34:06,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-04-06 20:34:06,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 192. [2022-04-06 20:34:06,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.2994652406417113) internal successors, (243), 187 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:06,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 247 transitions. [2022-04-06 20:34:06,385 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 247 transitions. Word has length 44 [2022-04-06 20:34:06,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:06,385 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 247 transitions. [2022-04-06 20:34:06,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:06,385 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 247 transitions. [2022-04-06 20:34:06,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:34:06,385 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:06,385 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:06,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:06,589 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-04-06 20:34:06,589 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:06,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:06,590 INFO L85 PathProgramCache]: Analyzing trace with hash 917310221, now seen corresponding path program 193 times [2022-04-06 20:34:06,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:06,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [8159387] [2022-04-06 20:34:06,590 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:06,590 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:06,590 INFO L85 PathProgramCache]: Analyzing trace with hash 917310221, now seen corresponding path program 194 times [2022-04-06 20:34:06,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:06,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115569610] [2022-04-06 20:34:06,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:06,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:06,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:34:06,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:06,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115569610] [2022-04-06 20:34:06,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115569610] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:06,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006105486] [2022-04-06 20:34:06,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:34:06,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:06,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:06,807 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:06,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 20:34:06,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:34:06,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:06,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:34:06,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:34:06,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:34:07,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006105486] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:07,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:07,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:34:07,280 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:07,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [8159387] [2022-04-06 20:34:07,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [8159387] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:07,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:07,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:34:07,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961209285] [2022-04-06 20:34:07,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:07,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:34:07,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:07,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:34:07,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1246, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:34:07,281 INFO L87 Difference]: Start difference. First operand 192 states and 247 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:07,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:07,863 INFO L93 Difference]: Finished difference Result 229 states and 284 transitions. [2022-04-06 20:34:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:34:07,864 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:34:07,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:07,864 INFO L225 Difference]: With dead ends: 229 [2022-04-06 20:34:07,864 INFO L226 Difference]: Without dead ends: 209 [2022-04-06 20:34:07,865 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=746, Invalid=2914, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:34:07,865 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:07,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 106 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:34:07,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-04-06 20:34:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 193. [2022-04-06 20:34:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.297872340425532) internal successors, (244), 188 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 248 transitions. [2022-04-06 20:34:07,917 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 248 transitions. Word has length 44 [2022-04-06 20:34:07,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:07,917 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 248 transitions. [2022-04-06 20:34:07,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 248 transitions. [2022-04-06 20:34:07,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:34:07,917 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:07,917 INFO L499 BasicCegarLoop]: trace histogram [27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:07,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-04-06 20:34:08,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:08,133 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:08,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:08,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1518166610, now seen corresponding path program 195 times [2022-04-06 20:34:08,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:08,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [486843378] [2022-04-06 20:34:08,134 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:08,134 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:08,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1518166610, now seen corresponding path program 196 times [2022-04-06 20:34:08,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:08,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492957279] [2022-04-06 20:34:08,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:08,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:08,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:34:08,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:08,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492957279] [2022-04-06 20:34:08,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492957279] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:08,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557247878] [2022-04-06 20:34:08,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:34:08,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:08,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:08,519 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:08,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 20:34:08,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:34:08,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:08,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:34:08,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:34:08,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:34:09,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557247878] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:09,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:09,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:34:09,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:09,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [486843378] [2022-04-06 20:34:09,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [486843378] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:09,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:09,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:34:09,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12672091] [2022-04-06 20:34:09,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:09,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:34:09,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:09,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:34:09,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=3117, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:34:09,841 INFO L87 Difference]: Start difference. First operand 193 states and 248 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:11,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:11,503 INFO L93 Difference]: Finished difference Result 307 states and 446 transitions. [2022-04-06 20:34:11,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:34:11,503 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:34:11,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:11,504 INFO L225 Difference]: With dead ends: 307 [2022-04-06 20:34:11,504 INFO L226 Difference]: Without dead ends: 299 [2022-04-06 20:34:11,505 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1919, Invalid=7011, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:34:11,505 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 155 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3937 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 4056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 3937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:11,505 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 214 Invalid, 4056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 3937 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:34:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-04-06 20:34:11,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 199. [2022-04-06 20:34:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.2989690721649485) internal successors, (252), 194 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 256 transitions. [2022-04-06 20:34:11,571 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 256 transitions. Word has length 44 [2022-04-06 20:34:11,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:11,571 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 256 transitions. [2022-04-06 20:34:11,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:11,571 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 256 transitions. [2022-04-06 20:34:11,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:34:11,571 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:11,571 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:11,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:11,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-04-06 20:34:11,787 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:11,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:11,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1633510225, now seen corresponding path program 197 times [2022-04-06 20:34:11,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:11,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1392251991] [2022-04-06 20:34:11,788 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:11,788 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:11,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1633510225, now seen corresponding path program 198 times [2022-04-06 20:34:11,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:11,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674156178] [2022-04-06 20:34:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:11,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:11,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:34:11,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:11,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674156178] [2022-04-06 20:34:11,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674156178] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:11,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138044975] [2022-04-06 20:34:11,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:34:11,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:11,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:11,983 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:11,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-06 20:34:12,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:34:12,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:12,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 20:34:12,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:34:12,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:34:13,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138044975] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:13,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:13,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 58 [2022-04-06 20:34:13,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:13,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1392251991] [2022-04-06 20:34:13,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1392251991] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:13,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:13,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:34:13,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952376248] [2022-04-06 20:34:13,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:13,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:34:13,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:34:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=2808, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:34:13,056 INFO L87 Difference]: Start difference. First operand 199 states and 256 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:13,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:13,510 INFO L93 Difference]: Finished difference Result 215 states and 271 transitions. [2022-04-06 20:34:13,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:34:13,510 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 20:34:13,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:13,511 INFO L225 Difference]: With dead ends: 215 [2022-04-06 20:34:13,511 INFO L226 Difference]: Without dead ends: 186 [2022-04-06 20:34:13,512 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=960, Invalid=5360, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:34:13,512 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:13,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 126 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:34:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-04-06 20:34:13,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-04-06 20:34:13,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.3093922651933703) internal successors, (237), 181 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:13,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 241 transitions. [2022-04-06 20:34:13,568 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 241 transitions. Word has length 45 [2022-04-06 20:34:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:13,568 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 241 transitions. [2022-04-06 20:34:13,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 241 transitions. [2022-04-06 20:34:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:34:13,569 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:13,569 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:13,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-04-06 20:34:13,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-06 20:34:13,773 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:13,773 INFO L85 PathProgramCache]: Analyzing trace with hash 462891775, now seen corresponding path program 199 times [2022-04-06 20:34:13,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:13,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [151145010] [2022-04-06 20:34:13,775 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:13,775 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash 462891775, now seen corresponding path program 200 times [2022-04-06 20:34:13,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:13,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004211394] [2022-04-06 20:34:13,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:13,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:13,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:34:13,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:13,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004211394] [2022-04-06 20:34:13,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004211394] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:13,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669311585] [2022-04-06 20:34:13,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:34:13,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:13,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:13,994 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:13,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-06 20:34:14,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:34:14,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:14,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 20:34:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:34:14,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 90 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:34:14,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669311585] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:14,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:14,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 22] total 55 [2022-04-06 20:34:14,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:14,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [151145010] [2022-04-06 20:34:14,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [151145010] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:14,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:14,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:34:14,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792455653] [2022-04-06 20:34:14,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:14,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:34:14,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:14,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:34:14,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=2618, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:34:14,752 INFO L87 Difference]: Start difference. First operand 186 states and 241 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:15,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:15,324 INFO L93 Difference]: Finished difference Result 217 states and 272 transitions. [2022-04-06 20:34:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:34:15,324 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 20:34:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:15,325 INFO L225 Difference]: With dead ends: 217 [2022-04-06 20:34:15,325 INFO L226 Difference]: Without dead ends: 200 [2022-04-06 20:34:15,327 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=592, Invalid=5260, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:34:15,327 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:15,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 88 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:34:15,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-04-06 20:34:15,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 187. [2022-04-06 20:34:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.3076923076923077) internal successors, (238), 182 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 242 transitions. [2022-04-06 20:34:15,381 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 242 transitions. Word has length 45 [2022-04-06 20:34:15,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:15,381 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 242 transitions. [2022-04-06 20:34:15,381 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:15,381 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 242 transitions. [2022-04-06 20:34:15,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:34:15,381 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:15,381 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:15,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-04-06 20:34:15,597 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-04-06 20:34:15,597 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:15,597 INFO L85 PathProgramCache]: Analyzing trace with hash 606825199, now seen corresponding path program 201 times [2022-04-06 20:34:15,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:15,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [502738854] [2022-04-06 20:34:15,598 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:15,598 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:15,598 INFO L85 PathProgramCache]: Analyzing trace with hash 606825199, now seen corresponding path program 202 times [2022-04-06 20:34:15,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:15,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887649363] [2022-04-06 20:34:15,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:15,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:15,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:34:15,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:15,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887649363] [2022-04-06 20:34:15,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887649363] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:15,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490846214] [2022-04-06 20:34:15,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:34:15,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:15,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:15,870 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:15,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-06 20:34:15,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:34:15,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:15,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:34:15,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:34:16,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:34:16,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490846214] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:16,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:16,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:34:16,544 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:16,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [502738854] [2022-04-06 20:34:16,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [502738854] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:16,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:16,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:34:16,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569200506] [2022-04-06 20:34:16,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:16,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:34:16,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:16,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:34:16,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1746, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:34:16,545 INFO L87 Difference]: Start difference. First operand 187 states and 242 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:17,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:17,243 INFO L93 Difference]: Finished difference Result 220 states and 275 transitions. [2022-04-06 20:34:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:34:17,244 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 20:34:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:17,244 INFO L225 Difference]: With dead ends: 220 [2022-04-06 20:34:17,244 INFO L226 Difference]: Without dead ends: 202 [2022-04-06 20:34:17,244 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=958, Invalid=4444, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:34:17,245 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:17,245 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:34:17,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-04-06 20:34:17,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 188. [2022-04-06 20:34:17,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.3060109289617485) internal successors, (239), 183 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:17,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 243 transitions. [2022-04-06 20:34:17,297 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 243 transitions. Word has length 45 [2022-04-06 20:34:17,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:17,297 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 243 transitions. [2022-04-06 20:34:17,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:17,297 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 243 transitions. [2022-04-06 20:34:17,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:34:17,298 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:17,298 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:17,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:17,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:17,511 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:17,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:17,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1175887039, now seen corresponding path program 203 times [2022-04-06 20:34:17,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:17,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1005360690] [2022-04-06 20:34:17,512 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:17,512 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:17,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1175887039, now seen corresponding path program 204 times [2022-04-06 20:34:17,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:17,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682408271] [2022-04-06 20:34:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:17,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:17,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:34:17,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:17,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682408271] [2022-04-06 20:34:17,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682408271] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:17,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211718430] [2022-04-06 20:34:17,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:34:17,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:17,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:17,686 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:17,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-06 20:34:18,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:34:18,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:18,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:34:18,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:34:18,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:34:18,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211718430] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:18,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:18,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:34:18,838 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:18,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1005360690] [2022-04-06 20:34:18,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1005360690] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:18,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:18,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:34:18,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446506164] [2022-04-06 20:34:18,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:18,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:34:18,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:18,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:34:18,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:34:18,839 INFO L87 Difference]: Start difference. First operand 188 states and 243 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:19,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:19,411 INFO L93 Difference]: Finished difference Result 223 states and 278 transitions. [2022-04-06 20:34:19,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:34:19,411 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 20:34:19,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:19,412 INFO L225 Difference]: With dead ends: 223 [2022-04-06 20:34:19,412 INFO L226 Difference]: Without dead ends: 204 [2022-04-06 20:34:19,412 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=983, Invalid=4273, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:34:19,412 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:19,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 102 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:34:19,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-04-06 20:34:19,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 189. [2022-04-06 20:34:19,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.3043478260869565) internal successors, (240), 184 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:19,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 244 transitions. [2022-04-06 20:34:19,465 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 244 transitions. Word has length 45 [2022-04-06 20:34:19,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:19,465 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 244 transitions. [2022-04-06 20:34:19,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:19,465 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 244 transitions. [2022-04-06 20:34:19,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:34:19,465 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:19,465 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:19,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-04-06 20:34:19,669 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:19,669 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:19,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:19,670 INFO L85 PathProgramCache]: Analyzing trace with hash -151209681, now seen corresponding path program 205 times [2022-04-06 20:34:19,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:19,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [165677766] [2022-04-06 20:34:19,670 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:19,670 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:19,670 INFO L85 PathProgramCache]: Analyzing trace with hash -151209681, now seen corresponding path program 206 times [2022-04-06 20:34:19,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:19,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091869201] [2022-04-06 20:34:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:19,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:19,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:34:19,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:19,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091869201] [2022-04-06 20:34:19,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091869201] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:19,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695898912] [2022-04-06 20:34:19,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:34:19,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:19,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:19,852 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:19,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-06 20:34:19,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:34:19,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:19,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:34:19,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:34:19,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:34:20,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695898912] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:20,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:20,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:34:20,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:20,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [165677766] [2022-04-06 20:34:20,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [165677766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:20,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:20,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:34:20,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968347580] [2022-04-06 20:34:20,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:20,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:34:20,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:20,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:34:20,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1396, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:34:20,335 INFO L87 Difference]: Start difference. First operand 189 states and 244 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:20,880 INFO L93 Difference]: Finished difference Result 226 states and 281 transitions. [2022-04-06 20:34:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:34:20,881 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 20:34:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:20,881 INFO L225 Difference]: With dead ends: 226 [2022-04-06 20:34:20,881 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 20:34:20,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=869, Invalid=3553, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:34:20,882 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:20,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 109 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:34:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 20:34:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 190. [2022-04-06 20:34:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.3027027027027027) internal successors, (241), 185 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 245 transitions. [2022-04-06 20:34:20,941 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 245 transitions. Word has length 45 [2022-04-06 20:34:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:20,941 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 245 transitions. [2022-04-06 20:34:20,941 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 245 transitions. [2022-04-06 20:34:20,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:34:20,941 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:20,942 INFO L499 BasicCegarLoop]: trace histogram [28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:20,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-04-06 20:34:21,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-04-06 20:34:21,143 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:21,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:21,143 INFO L85 PathProgramCache]: Analyzing trace with hash -362075825, now seen corresponding path program 207 times [2022-04-06 20:34:21,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:21,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2002481147] [2022-04-06 20:34:21,144 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:21,144 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:21,144 INFO L85 PathProgramCache]: Analyzing trace with hash -362075825, now seen corresponding path program 208 times [2022-04-06 20:34:21,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:21,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324491327] [2022-04-06 20:34:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:21,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:21,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:34:21,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:21,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324491327] [2022-04-06 20:34:21,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324491327] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:21,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867905089] [2022-04-06 20:34:21,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:34:21,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:21,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:21,487 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:21,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-06 20:34:21,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:34:21,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:21,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:34:21,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:34:21,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:34:22,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867905089] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:22,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:22,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:34:22,726 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:22,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2002481147] [2022-04-06 20:34:22,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2002481147] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:22,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:22,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:34:22,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220076465] [2022-04-06 20:34:22,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:22,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:34:22,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:22,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:34:22,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=3314, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:34:22,726 INFO L87 Difference]: Start difference. First operand 190 states and 245 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:24,054 INFO L93 Difference]: Finished difference Result 305 states and 445 transitions. [2022-04-06 20:34:24,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:34:24,054 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 20:34:24,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:24,055 INFO L225 Difference]: With dead ends: 305 [2022-04-06 20:34:24,055 INFO L226 Difference]: Without dead ends: 297 [2022-04-06 20:34:24,055 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2044, Invalid=7462, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:34:24,056 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 155 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 4132 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 4255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 4132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:24,056 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 219 Invalid, 4255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 4132 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:34:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-04-06 20:34:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 196. [2022-04-06 20:34:24,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.3036649214659686) internal successors, (249), 191 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 253 transitions. [2022-04-06 20:34:24,110 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 253 transitions. Word has length 45 [2022-04-06 20:34:24,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:24,110 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 253 transitions. [2022-04-06 20:34:24,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:24,110 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 253 transitions. [2022-04-06 20:34:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:34:24,110 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:24,110 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:24,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-04-06 20:34:24,313 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:24,313 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:24,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:24,313 INFO L85 PathProgramCache]: Analyzing trace with hash -908063361, now seen corresponding path program 209 times [2022-04-06 20:34:24,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:24,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1801579363] [2022-04-06 20:34:24,314 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:24,314 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:24,314 INFO L85 PathProgramCache]: Analyzing trace with hash -908063361, now seen corresponding path program 210 times [2022-04-06 20:34:24,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:24,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514950727] [2022-04-06 20:34:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:24,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:24,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:34:24,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:24,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514950727] [2022-04-06 20:34:24,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514950727] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:24,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090470675] [2022-04-06 20:34:24,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:34:24,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:24,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:24,627 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:24,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-06 20:34:25,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:34:25,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:25,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 20:34:25,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:34:25,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:34:25,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090470675] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:25,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:25,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 24] total 59 [2022-04-06 20:34:25,958 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:25,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1801579363] [2022-04-06 20:34:25,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1801579363] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:25,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:25,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:34:25,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302069824] [2022-04-06 20:34:25,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:25,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:34:25,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:25,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:34:25,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=3019, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:34:25,959 INFO L87 Difference]: Start difference. First operand 196 states and 253 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:26,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:26,801 INFO L93 Difference]: Finished difference Result 227 states and 284 transitions. [2022-04-06 20:34:26,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:34:26,801 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:34:26,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:26,802 INFO L225 Difference]: With dead ends: 227 [2022-04-06 20:34:26,802 INFO L226 Difference]: Without dead ends: 210 [2022-04-06 20:34:26,802 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=671, Invalid=5971, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:34:26,802 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:26,802 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 133 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:34:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-06 20:34:26,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 197. [2022-04-06 20:34:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.3020833333333333) internal successors, (250), 192 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:26,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 254 transitions. [2022-04-06 20:34:26,857 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 254 transitions. Word has length 46 [2022-04-06 20:34:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:26,857 INFO L478 AbstractCegarLoop]: Abstraction has 197 states and 254 transitions. [2022-04-06 20:34:26,857 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:26,857 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 254 transitions. [2022-04-06 20:34:26,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:34:26,857 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:26,857 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:26,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:27,061 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:27,061 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:27,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:27,062 INFO L85 PathProgramCache]: Analyzing trace with hash 54302029, now seen corresponding path program 211 times [2022-04-06 20:34:27,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:27,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2110788284] [2022-04-06 20:34:27,062 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:27,062 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:27,062 INFO L85 PathProgramCache]: Analyzing trace with hash 54302029, now seen corresponding path program 212 times [2022-04-06 20:34:27,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:27,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035026527] [2022-04-06 20:34:27,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:27,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:27,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:34:27,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:27,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035026527] [2022-04-06 20:34:27,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035026527] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:27,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958192051] [2022-04-06 20:34:27,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:34:27,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:27,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:27,352 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:27,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-06 20:34:27,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:34:27,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:27,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:34:27,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:34:27,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:34:28,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958192051] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:28,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:28,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:34:28,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:28,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2110788284] [2022-04-06 20:34:28,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2110788284] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:28,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:28,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:34:28,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338212472] [2022-04-06 20:34:28,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:28,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:34:28,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:28,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:34:28,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=1914, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:34:28,124 INFO L87 Difference]: Start difference. First operand 197 states and 254 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:28,961 INFO L93 Difference]: Finished difference Result 230 states and 287 transitions. [2022-04-06 20:34:28,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:34:28,961 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:34:28,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:28,962 INFO L225 Difference]: With dead ends: 230 [2022-04-06 20:34:28,962 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 20:34:28,962 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1042, Invalid=4964, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:34:28,962 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:28,962 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:34:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 20:34:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 198. [2022-04-06 20:34:29,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.3005181347150259) internal successors, (251), 193 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 255 transitions. [2022-04-06 20:34:29,017 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 255 transitions. Word has length 46 [2022-04-06 20:34:29,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:29,017 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 255 transitions. [2022-04-06 20:34:29,017 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:29,017 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 255 transitions. [2022-04-06 20:34:29,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:34:29,017 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:29,017 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:29,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:29,218 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:29,218 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:29,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:29,218 INFO L85 PathProgramCache]: Analyzing trace with hash -597161089, now seen corresponding path program 213 times [2022-04-06 20:34:29,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:29,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1585194583] [2022-04-06 20:34:29,219 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:29,219 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:29,219 INFO L85 PathProgramCache]: Analyzing trace with hash -597161089, now seen corresponding path program 214 times [2022-04-06 20:34:29,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:29,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396348313] [2022-04-06 20:34:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:29,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:29,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:34:29,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:29,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396348313] [2022-04-06 20:34:29,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396348313] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:29,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756001812] [2022-04-06 20:34:29,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:34:29,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:29,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:29,507 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:29,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-04-06 20:34:29,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:34:29,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:29,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:34:29,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:34:29,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:34:30,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756001812] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:30,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:30,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:34:30,103 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:30,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1585194583] [2022-04-06 20:34:30,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1585194583] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:30,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:30,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:34:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741080938] [2022-04-06 20:34:30,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:30,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:34:30,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:30,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:34:30,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1729, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:34:30,104 INFO L87 Difference]: Start difference. First operand 198 states and 255 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:30,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:30,722 INFO L93 Difference]: Finished difference Result 233 states and 290 transitions. [2022-04-06 20:34:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:34:30,722 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:34:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:30,723 INFO L225 Difference]: With dead ends: 233 [2022-04-06 20:34:30,723 INFO L226 Difference]: Without dead ends: 214 [2022-04-06 20:34:30,723 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1102, Invalid=4904, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:34:30,723 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:30,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 107 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:34:30,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-04-06 20:34:30,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 199. [2022-04-06 20:34:30,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.2989690721649485) internal successors, (252), 194 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 256 transitions. [2022-04-06 20:34:30,779 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 256 transitions. Word has length 46 [2022-04-06 20:34:30,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:30,779 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 256 transitions. [2022-04-06 20:34:30,779 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:30,779 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 256 transitions. [2022-04-06 20:34:30,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:34:30,779 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:30,779 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:30,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:30,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-04-06 20:34:30,995 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:30,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1084411725, now seen corresponding path program 215 times [2022-04-06 20:34:30,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:30,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [590695192] [2022-04-06 20:34:30,996 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:30,996 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:30,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1084411725, now seen corresponding path program 216 times [2022-04-06 20:34:30,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:30,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453747932] [2022-04-06 20:34:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:30,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:31,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:34:31,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:31,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453747932] [2022-04-06 20:34:31,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453747932] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:31,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095486138] [2022-04-06 20:34:31,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:34:31,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:31,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:31,245 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:31,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-04-06 20:34:31,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:34:31,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:31,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:34:31,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:34:31,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:34:32,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095486138] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:32,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:32,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:34:32,533 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:32,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [590695192] [2022-04-06 20:34:32,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [590695192] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:32,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:32,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:34:32,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609902291] [2022-04-06 20:34:32,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:32,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:34:32,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:32,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:34:32,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:34:32,534 INFO L87 Difference]: Start difference. First operand 199 states and 256 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:33,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:33,331 INFO L93 Difference]: Finished difference Result 236 states and 293 transitions. [2022-04-06 20:34:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:34:33,331 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:34:33,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:33,331 INFO L225 Difference]: With dead ends: 236 [2022-04-06 20:34:33,331 INFO L226 Difference]: Without dead ends: 216 [2022-04-06 20:34:33,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1004, Invalid=4252, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:34:33,332 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:33,332 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 124 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:34:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-04-06 20:34:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 200. [2022-04-06 20:34:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.2974358974358975) internal successors, (253), 195 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 257 transitions. [2022-04-06 20:34:33,395 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 257 transitions. Word has length 46 [2022-04-06 20:34:33,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:33,395 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 257 transitions. [2022-04-06 20:34:33,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 257 transitions. [2022-04-06 20:34:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:34:33,396 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:33,396 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:33,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:33,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-04-06 20:34:33,600 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:33,600 INFO L85 PathProgramCache]: Analyzing trace with hash -114583169, now seen corresponding path program 217 times [2022-04-06 20:34:33,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:33,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [658411982] [2022-04-06 20:34:33,601 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:33,601 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:33,601 INFO L85 PathProgramCache]: Analyzing trace with hash -114583169, now seen corresponding path program 218 times [2022-04-06 20:34:33,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:33,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920718654] [2022-04-06 20:34:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:33,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:33,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:34:33,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:33,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920718654] [2022-04-06 20:34:33,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920718654] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:33,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891158855] [2022-04-06 20:34:33,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:34:33,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:33,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:33,839 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:33,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-04-06 20:34:33,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:34:33,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:33,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:34:33,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:34:33,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:34:34,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891158855] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:34,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:34,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:34:34,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:34,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [658411982] [2022-04-06 20:34:34,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [658411982] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:34,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:34,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:34:34,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219708482] [2022-04-06 20:34:34,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:34,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:34:34,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:34,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:34:34,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:34:34,481 INFO L87 Difference]: Start difference. First operand 200 states and 257 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:34,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:34,980 INFO L93 Difference]: Finished difference Result 239 states and 296 transitions. [2022-04-06 20:34:34,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:34:34,981 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:34:34,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:34,981 INFO L225 Difference]: With dead ends: 239 [2022-04-06 20:34:34,981 INFO L226 Difference]: Without dead ends: 218 [2022-04-06 20:34:34,981 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=3210, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:34:34,982 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:34,982 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 116 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:34:34,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-04-06 20:34:35,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 201. [2022-04-06 20:34:35,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.2959183673469388) internal successors, (254), 196 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:35,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 258 transitions. [2022-04-06 20:34:35,039 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 258 transitions. Word has length 46 [2022-04-06 20:34:35,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:35,039 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 258 transitions. [2022-04-06 20:34:35,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:35,039 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 258 transitions. [2022-04-06 20:34:35,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:34:35,040 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:35,040 INFO L499 BasicCegarLoop]: trace histogram [29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:35,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:35,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-04-06 20:34:35,253 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:35,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1117000142, now seen corresponding path program 219 times [2022-04-06 20:34:35,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:35,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [221715484] [2022-04-06 20:34:35,254 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:35,254 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1117000142, now seen corresponding path program 220 times [2022-04-06 20:34:35,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:35,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022572312] [2022-04-06 20:34:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:35,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:35,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 0 proven. 436 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:34:35,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:35,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022572312] [2022-04-06 20:34:35,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022572312] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:35,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708498692] [2022-04-06 20:34:35,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:34:35,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:35,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:35,711 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:35,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-04-06 20:34:35,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:34:35,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:35,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:34:35,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 0 proven. 436 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:34:35,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 0 proven. 436 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:34:36,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708498692] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:36,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:36,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 20:34:36,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:36,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [221715484] [2022-04-06 20:34:36,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [221715484] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:36,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:36,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:34:36,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374194503] [2022-04-06 20:34:36,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:36,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:34:36,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:36,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:34:36,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=3517, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:34:36,931 INFO L87 Difference]: Start difference. First operand 201 states and 258 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:38,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:38,464 INFO L93 Difference]: Finished difference Result 317 states and 460 transitions. [2022-04-06 20:34:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:34:38,464 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:34:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:38,465 INFO L225 Difference]: With dead ends: 317 [2022-04-06 20:34:38,465 INFO L226 Difference]: Without dead ends: 309 [2022-04-06 20:34:38,465 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2173, Invalid=7927, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:34:38,466 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 163 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 4318 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 4445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 4318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:38,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 222 Invalid, 4445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 4318 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:34:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-04-06 20:34:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 207. [2022-04-06 20:34:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.297029702970297) internal successors, (262), 202 states have internal predecessors, (262), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 266 transitions. [2022-04-06 20:34:38,525 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 266 transitions. Word has length 46 [2022-04-06 20:34:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:38,526 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 266 transitions. [2022-04-06 20:34:38,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 266 transitions. [2022-04-06 20:34:38,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:34:38,526 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:38,526 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:38,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:38,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-04-06 20:34:38,742 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:38,742 INFO L85 PathProgramCache]: Analyzing trace with hash -457999617, now seen corresponding path program 221 times [2022-04-06 20:34:38,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:38,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1327031496] [2022-04-06 20:34:38,743 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:38,743 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:38,743 INFO L85 PathProgramCache]: Analyzing trace with hash -457999617, now seen corresponding path program 222 times [2022-04-06 20:34:38,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:38,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178978175] [2022-04-06 20:34:38,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:38,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:38,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:34:38,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:38,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178978175] [2022-04-06 20:34:38,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178978175] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:38,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354806712] [2022-04-06 20:34:38,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:34:38,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:38,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:38,947 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:38,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-04-06 20:34:39,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:34:39,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:39,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 20:34:39,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:34:39,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:34:39,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354806712] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:39,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:39,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 19 [2022-04-06 20:34:39,974 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:39,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1327031496] [2022-04-06 20:34:39,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1327031496] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:39,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:39,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:34:39,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580361541] [2022-04-06 20:34:39,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:39,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:34:39,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:39,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:34:39,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:34:39,975 INFO L87 Difference]: Start difference. First operand 207 states and 266 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:40,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:40,978 INFO L93 Difference]: Finished difference Result 692 states and 927 transitions. [2022-04-06 20:34:40,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:34:40,979 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:34:40,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:40,980 INFO L225 Difference]: With dead ends: 692 [2022-04-06 20:34:40,980 INFO L226 Difference]: Without dead ends: 675 [2022-04-06 20:34:40,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:34:40,980 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 44 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:40,980 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 116 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:34:40,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-04-06 20:34:41,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 211. [2022-04-06 20:34:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.3009708737864079) internal successors, (268), 206 states have internal predecessors, (268), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 272 transitions. [2022-04-06 20:34:41,045 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 272 transitions. Word has length 47 [2022-04-06 20:34:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:41,045 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 272 transitions. [2022-04-06 20:34:41,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 272 transitions. [2022-04-06 20:34:41,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:34:41,045 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:41,045 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:41,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:41,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:41,250 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:41,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:41,251 INFO L85 PathProgramCache]: Analyzing trace with hash 105952943, now seen corresponding path program 223 times [2022-04-06 20:34:41,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:41,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [739983883] [2022-04-06 20:34:41,254 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:41,254 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:41,254 INFO L85 PathProgramCache]: Analyzing trace with hash 105952943, now seen corresponding path program 224 times [2022-04-06 20:34:41,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:41,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342765683] [2022-04-06 20:34:41,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:41,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:41,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:34:41,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:41,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342765683] [2022-04-06 20:34:41,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342765683] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:41,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460529438] [2022-04-06 20:34:41,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:34:41,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:41,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:41,505 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:41,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-04-06 20:34:41,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:34:41,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:41,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 20:34:41,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:34:41,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:34:42,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460529438] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:42,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:42,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 22] total 56 [2022-04-06 20:34:42,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:42,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [739983883] [2022-04-06 20:34:42,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [739983883] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:42,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:42,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:34:42,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348521253] [2022-04-06 20:34:42,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:42,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:34:42,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:42,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:34:42,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=2723, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:34:42,360 INFO L87 Difference]: Start difference. First operand 211 states and 272 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:43,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:43,291 INFO L93 Difference]: Finished difference Result 244 states and 305 transitions. [2022-04-06 20:34:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:34:43,291 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:34:43,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:43,292 INFO L225 Difference]: With dead ends: 244 [2022-04-06 20:34:43,292 INFO L226 Difference]: Without dead ends: 226 [2022-04-06 20:34:43,292 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=750, Invalid=6906, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:34:43,292 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:43,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 135 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:34:43,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-04-06 20:34:43,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 212. [2022-04-06 20:34:43,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.2995169082125604) internal successors, (269), 207 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 273 transitions. [2022-04-06 20:34:43,356 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 273 transitions. Word has length 47 [2022-04-06 20:34:43,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:43,356 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 273 transitions. [2022-04-06 20:34:43,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:43,356 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 273 transitions. [2022-04-06 20:34:43,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:34:43,357 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:43,357 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:43,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:43,566 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:43,566 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:43,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:43,567 INFO L85 PathProgramCache]: Analyzing trace with hash 272921791, now seen corresponding path program 225 times [2022-04-06 20:34:43,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:43,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [451869119] [2022-04-06 20:34:43,567 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:43,567 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:43,567 INFO L85 PathProgramCache]: Analyzing trace with hash 272921791, now seen corresponding path program 226 times [2022-04-06 20:34:43,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:43,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077522266] [2022-04-06 20:34:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:43,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:43,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:34:43,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:43,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077522266] [2022-04-06 20:34:43,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077522266] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:43,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989582936] [2022-04-06 20:34:43,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:34:43,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:43,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:43,899 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:43,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-04-06 20:34:43,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:34:43,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:43,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:34:43,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:34:44,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:34:44,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989582936] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:44,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:44,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:34:44,440 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:44,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [451869119] [2022-04-06 20:34:44,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [451869119] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:44,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:44,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:34:44,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027714506] [2022-04-06 20:34:44,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:44,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:34:44,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:44,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:34:44,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1899, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:34:44,442 INFO L87 Difference]: Start difference. First operand 212 states and 273 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:45,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:45,324 INFO L93 Difference]: Finished difference Result 247 states and 308 transitions. [2022-04-06 20:34:45,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:34:45,325 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:34:45,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:45,325 INFO L225 Difference]: With dead ends: 247 [2022-04-06 20:34:45,325 INFO L226 Difference]: Without dead ends: 228 [2022-04-06 20:34:45,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1216, Invalid=5590, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:34:45,326 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:45,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 97 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:34:45,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-04-06 20:34:45,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 213. [2022-04-06 20:34:45,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.2980769230769231) internal successors, (270), 208 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 274 transitions. [2022-04-06 20:34:45,390 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 274 transitions. Word has length 47 [2022-04-06 20:34:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:45,390 INFO L478 AbstractCegarLoop]: Abstraction has 213 states and 274 transitions. [2022-04-06 20:34:45,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 274 transitions. [2022-04-06 20:34:45,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:34:45,390 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:45,391 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:45,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:45,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-04-06 20:34:45,592 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:45,593 INFO L85 PathProgramCache]: Analyzing trace with hash 733969647, now seen corresponding path program 227 times [2022-04-06 20:34:45,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:45,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [143882184] [2022-04-06 20:34:45,601 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:45,602 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:45,602 INFO L85 PathProgramCache]: Analyzing trace with hash 733969647, now seen corresponding path program 228 times [2022-04-06 20:34:45,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:45,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555182497] [2022-04-06 20:34:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:45,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:45,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:34:45,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:45,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555182497] [2022-04-06 20:34:45,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555182497] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:45,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475081641] [2022-04-06 20:34:45,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:34:45,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:45,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:45,814 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:45,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-04-06 20:34:46,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:34:46,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:46,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:34:46,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:34:46,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:34:46,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475081641] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:46,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:46,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:34:46,898 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:46,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [143882184] [2022-04-06 20:34:46,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [143882184] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:46,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:46,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:34:46,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352755381] [2022-04-06 20:34:46,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:46,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:34:46,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:46,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:34:46,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:34:46,899 INFO L87 Difference]: Start difference. First operand 213 states and 274 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:47,683 INFO L93 Difference]: Finished difference Result 250 states and 311 transitions. [2022-04-06 20:34:47,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:34:47,684 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:34:47,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:47,684 INFO L225 Difference]: With dead ends: 250 [2022-04-06 20:34:47,684 INFO L226 Difference]: Without dead ends: 230 [2022-04-06 20:34:47,685 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1149, Invalid=5013, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:34:47,685 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:47,685 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 119 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:34:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-06 20:34:47,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 214. [2022-04-06 20:34:47,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.2966507177033493) internal successors, (271), 209 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 275 transitions. [2022-04-06 20:34:47,751 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 275 transitions. Word has length 47 [2022-04-06 20:34:47,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:47,752 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 275 transitions. [2022-04-06 20:34:47,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:47,752 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 275 transitions. [2022-04-06 20:34:47,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:34:47,752 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:47,752 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:47,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:47,956 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:47,956 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:47,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:47,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1751323009, now seen corresponding path program 229 times [2022-04-06 20:34:47,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:47,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [289665854] [2022-04-06 20:34:47,957 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:47,957 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:47,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1751323009, now seen corresponding path program 230 times [2022-04-06 20:34:47,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:47,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749834794] [2022-04-06 20:34:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:47,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:48,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:34:48,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:48,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749834794] [2022-04-06 20:34:48,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749834794] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:48,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335655799] [2022-04-06 20:34:48,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:34:48,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:48,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:48,196 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:48,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-04-06 20:34:48,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:34:48,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:48,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:34:48,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:34:48,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:34:48,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335655799] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:48,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:48,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:34:48,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:48,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [289665854] [2022-04-06 20:34:48,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [289665854] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:48,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:48,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:34:48,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658307316] [2022-04-06 20:34:48,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:48,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:34:48,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:48,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:34:48,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=1531, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:34:48,896 INFO L87 Difference]: Start difference. First operand 214 states and 275 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:49,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:49,668 INFO L93 Difference]: Finished difference Result 253 states and 314 transitions. [2022-04-06 20:34:49,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:34:49,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:34:49,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:49,669 INFO L225 Difference]: With dead ends: 253 [2022-04-06 20:34:49,669 INFO L226 Difference]: Without dead ends: 232 [2022-04-06 20:34:49,670 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=949, Invalid=3881, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:34:49,670 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:49,670 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 122 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:34:49,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-04-06 20:34:49,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 215. [2022-04-06 20:34:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.2952380952380953) internal successors, (272), 210 states have internal predecessors, (272), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 276 transitions. [2022-04-06 20:34:49,737 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 276 transitions. Word has length 47 [2022-04-06 20:34:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:49,737 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 276 transitions. [2022-04-06 20:34:49,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 276 transitions. [2022-04-06 20:34:49,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:34:49,738 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:49,738 INFO L499 BasicCegarLoop]: trace histogram [30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:49,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-04-06 20:34:49,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:49,938 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:49,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:49,938 INFO L85 PathProgramCache]: Analyzing trace with hash -276285137, now seen corresponding path program 231 times [2022-04-06 20:34:49,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:49,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [633353314] [2022-04-06 20:34:49,939 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:49,939 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:49,939 INFO L85 PathProgramCache]: Analyzing trace with hash -276285137, now seen corresponding path program 232 times [2022-04-06 20:34:49,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:49,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289278923] [2022-04-06 20:34:49,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:49,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:50,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 466 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:34:50,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:50,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289278923] [2022-04-06 20:34:50,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289278923] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:50,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865762192] [2022-04-06 20:34:50,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:34:50,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:50,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:50,491 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:50,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-04-06 20:34:50,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:34:50,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:50,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:34:50,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 466 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:34:50,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 466 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:34:51,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865762192] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:51,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:51,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 20:34:51,891 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:51,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [633353314] [2022-04-06 20:34:51,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [633353314] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:51,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:51,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:34:51,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362721068] [2022-04-06 20:34:51,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:51,892 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:34:51,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:51,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:34:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1104, Invalid=3726, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:34:51,893 INFO L87 Difference]: Start difference. First operand 215 states and 276 transitions. Second operand has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:53,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:53,510 INFO L93 Difference]: Finished difference Result 345 states and 504 transitions. [2022-04-06 20:34:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:34:53,510 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:34:53,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:53,511 INFO L225 Difference]: With dead ends: 345 [2022-04-06 20:34:53,511 INFO L226 Difference]: Without dead ends: 337 [2022-04-06 20:34:53,511 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2306, Invalid=8406, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:34:53,511 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 171 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 4792 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 4923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 4792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:53,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 235 Invalid, 4923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 4792 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:34:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-04-06 20:34:53,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 221. [2022-04-06 20:34:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.2962962962962963) internal successors, (280), 216 states have internal predecessors, (280), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:53,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 284 transitions. [2022-04-06 20:34:53,581 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 284 transitions. Word has length 47 [2022-04-06 20:34:53,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:53,581 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 284 transitions. [2022-04-06 20:34:53,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:53,581 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 284 transitions. [2022-04-06 20:34:53,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:34:53,581 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:53,581 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:53,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:53,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:53,783 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:53,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:53,784 INFO L85 PathProgramCache]: Analyzing trace with hash 609074559, now seen corresponding path program 233 times [2022-04-06 20:34:53,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:53,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1270011314] [2022-04-06 20:34:53,784 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:53,784 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:53,784 INFO L85 PathProgramCache]: Analyzing trace with hash 609074559, now seen corresponding path program 234 times [2022-04-06 20:34:53,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:53,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499281104] [2022-04-06 20:34:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:53,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:54,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:34:54,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:54,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499281104] [2022-04-06 20:34:54,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499281104] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:54,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454066756] [2022-04-06 20:34:54,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:34:54,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:54,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:54,130 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:54,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-04-06 20:34:54,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:34:54,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:54,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 20:34:54,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:34:54,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:34:55,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454066756] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:55,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:55,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 63 [2022-04-06 20:34:55,353 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:55,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1270011314] [2022-04-06 20:34:55,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1270011314] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:55,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:55,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:34:55,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767887442] [2022-04-06 20:34:55,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:55,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:34:55,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:55,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:34:55,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=3327, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:34:55,354 INFO L87 Difference]: Start difference. First operand 221 states and 284 transitions. Second operand has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 26 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:55,894 INFO L93 Difference]: Finished difference Result 238 states and 300 transitions. [2022-04-06 20:34:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:34:55,894 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 26 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:34:55,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:55,895 INFO L225 Difference]: With dead ends: 238 [2022-04-06 20:34:55,895 INFO L226 Difference]: Without dead ends: 207 [2022-04-06 20:34:55,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1119, Invalid=6363, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:34:55,896 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:55,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 136 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:34:55,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-04-06 20:34:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-04-06 20:34:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.306930693069307) internal successors, (264), 202 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 268 transitions. [2022-04-06 20:34:55,966 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 268 transitions. Word has length 48 [2022-04-06 20:34:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:55,966 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 268 transitions. [2022-04-06 20:34:55,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 26 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 268 transitions. [2022-04-06 20:34:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:34:55,966 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:55,966 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:55,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:56,170 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:56,171 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:56,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:56,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1707131277, now seen corresponding path program 235 times [2022-04-06 20:34:56,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:56,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [867020310] [2022-04-06 20:34:56,172 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:56,172 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:56,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1707131277, now seen corresponding path program 236 times [2022-04-06 20:34:56,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:56,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464752497] [2022-04-06 20:34:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:56,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:56,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:34:56,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:56,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464752497] [2022-04-06 20:34:56,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464752497] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:56,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680955681] [2022-04-06 20:34:56,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:34:56,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:56,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:56,381 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:56,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-04-06 20:34:56,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:34:56,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:56,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 70 conjunts are in the unsatisfiable core [2022-04-06 20:34:56,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:34:56,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 110 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:34:57,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680955681] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:57,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:57,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 24] total 60 [2022-04-06 20:34:57,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:57,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [867020310] [2022-04-06 20:34:57,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [867020310] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:57,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:57,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:34:57,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884029447] [2022-04-06 20:34:57,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:57,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:34:57,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:57,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:34:57,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=3132, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:34:57,267 INFO L87 Difference]: Start difference. First operand 207 states and 268 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:58,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:58,082 INFO L93 Difference]: Finished difference Result 240 states and 301 transitions. [2022-04-06 20:34:58,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:34:58,082 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:34:58,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:58,082 INFO L225 Difference]: With dead ends: 240 [2022-04-06 20:34:58,082 INFO L226 Difference]: Without dead ends: 222 [2022-04-06 20:34:58,083 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=682, Invalid=6290, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:34:58,083 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:58,083 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 123 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:34:58,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-04-06 20:34:58,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 208. [2022-04-06 20:34:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.3054187192118227) internal successors, (265), 203 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 269 transitions. [2022-04-06 20:34:58,155 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 269 transitions. Word has length 48 [2022-04-06 20:34:58,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:58,155 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 269 transitions. [2022-04-06 20:34:58,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:58,155 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 269 transitions. [2022-04-06 20:34:58,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:34:58,155 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:58,155 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:58,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:58,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-04-06 20:34:58,371 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:58,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1475687295, now seen corresponding path program 237 times [2022-04-06 20:34:58,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:58,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1549110864] [2022-04-06 20:34:58,372 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:58,372 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:58,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1475687295, now seen corresponding path program 238 times [2022-04-06 20:34:58,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:58,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321092425] [2022-04-06 20:34:58,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:58,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:58,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:34:58,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:58,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321092425] [2022-04-06 20:34:58,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321092425] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:58,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462798419] [2022-04-06 20:34:58,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:34:58,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:58,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:58,676 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:58,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-04-06 20:34:58,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:34:58,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:58,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:34:58,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:34:58,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:34:59,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462798419] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:59,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:59,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:34:59,402 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:59,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1549110864] [2022-04-06 20:34:59,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1549110864] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:59,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:59,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:34:59,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887587589] [2022-04-06 20:34:59,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:59,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:34:59,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:34:59,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=2075, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:34:59,403 INFO L87 Difference]: Start difference. First operand 208 states and 269 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:00,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:00,080 INFO L93 Difference]: Finished difference Result 243 states and 304 transitions. [2022-04-06 20:35:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:35:00,080 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:35:00,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:00,081 INFO L225 Difference]: With dead ends: 243 [2022-04-06 20:35:00,081 INFO L226 Difference]: Without dead ends: 224 [2022-04-06 20:35:00,081 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1127, Invalid=5353, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:35:00,082 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:00,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 110 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:35:00,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-06 20:35:00,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 209. [2022-04-06 20:35:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.303921568627451) internal successors, (266), 204 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 270 transitions. [2022-04-06 20:35:00,155 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 270 transitions. Word has length 48 [2022-04-06 20:35:00,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:00,155 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 270 transitions. [2022-04-06 20:35:00,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:00,155 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 270 transitions. [2022-04-06 20:35:00,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:35:00,156 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:00,156 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:00,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:00,372 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-04-06 20:35:00,372 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:00,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:00,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1539800179, now seen corresponding path program 239 times [2022-04-06 20:35:00,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:00,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1979305038] [2022-04-06 20:35:00,373 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:00,373 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:00,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1539800179, now seen corresponding path program 240 times [2022-04-06 20:35:00,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:00,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138562153] [2022-04-06 20:35:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:00,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:00,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:35:00,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:00,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138562153] [2022-04-06 20:35:00,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138562153] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:00,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226540599] [2022-04-06 20:35:00,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:35:00,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:00,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:00,670 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:00,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-04-06 20:35:01,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:35:01,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:01,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:35:01,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:35:01,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:35:02,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226540599] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:02,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:02,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:35:02,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:02,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1979305038] [2022-04-06 20:35:02,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1979305038] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:02,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:02,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:35:02,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932878374] [2022-04-06 20:35:02,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:02,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:35:02,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:02,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:35:02,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1882, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:35:02,015 INFO L87 Difference]: Start difference. First operand 209 states and 270 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:02,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:02,882 INFO L93 Difference]: Finished difference Result 246 states and 307 transitions. [2022-04-06 20:35:02,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:35:02,883 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:35:02,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:02,883 INFO L225 Difference]: With dead ends: 246 [2022-04-06 20:35:02,883 INFO L226 Difference]: Without dead ends: 226 [2022-04-06 20:35:02,884 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1186, Invalid=5294, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:35:02,884 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:02,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 107 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:35:02,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-04-06 20:35:02,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 210. [2022-04-06 20:35:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.302439024390244) internal successors, (267), 205 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 271 transitions. [2022-04-06 20:35:02,955 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 271 transitions. Word has length 48 [2022-04-06 20:35:02,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:02,955 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 271 transitions. [2022-04-06 20:35:02,955 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:02,955 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 271 transitions. [2022-04-06 20:35:02,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:35:02,955 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:02,955 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:02,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:03,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:03,160 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:03,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:03,161 INFO L85 PathProgramCache]: Analyzing trace with hash -950650497, now seen corresponding path program 241 times [2022-04-06 20:35:03,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:03,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [565115958] [2022-04-06 20:35:03,161 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:03,161 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:03,161 INFO L85 PathProgramCache]: Analyzing trace with hash -950650497, now seen corresponding path program 242 times [2022-04-06 20:35:03,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:03,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528069182] [2022-04-06 20:35:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:03,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:03,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:35:03,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:03,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528069182] [2022-04-06 20:35:03,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528069182] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:03,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495130521] [2022-04-06 20:35:03,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:03,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:03,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:03,338 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:03,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-04-06 20:35:03,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:03,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:03,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:35:03,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:35:03,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:35:03,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495130521] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:03,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:03,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:35:03,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:03,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [565115958] [2022-04-06 20:35:03,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [565115958] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:03,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:03,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:35:03,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179271255] [2022-04-06 20:35:03,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:03,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:35:03,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:03,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:35:03,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:35:03,884 INFO L87 Difference]: Start difference. First operand 210 states and 271 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:04,696 INFO L93 Difference]: Finished difference Result 249 states and 310 transitions. [2022-04-06 20:35:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:35:04,696 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:35:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:04,696 INFO L225 Difference]: With dead ends: 249 [2022-04-06 20:35:04,696 INFO L226 Difference]: Without dead ends: 228 [2022-04-06 20:35:04,697 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1088, Invalid=4612, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:35:04,697 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:04,697 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 114 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:35:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-04-06 20:35:04,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 211. [2022-04-06 20:35:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.3009708737864079) internal successors, (268), 206 states have internal predecessors, (268), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 272 transitions. [2022-04-06 20:35:04,767 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 272 transitions. Word has length 48 [2022-04-06 20:35:04,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:04,767 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 272 transitions. [2022-04-06 20:35:04,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:04,767 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 272 transitions. [2022-04-06 20:35:04,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:35:04,769 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:04,769 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:04,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:04,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-04-06 20:35:04,971 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:04,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:04,972 INFO L85 PathProgramCache]: Analyzing trace with hash 535213453, now seen corresponding path program 243 times [2022-04-06 20:35:04,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:04,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1173957793] [2022-04-06 20:35:04,972 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:04,972 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:04,972 INFO L85 PathProgramCache]: Analyzing trace with hash 535213453, now seen corresponding path program 244 times [2022-04-06 20:35:04,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:04,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106724185] [2022-04-06 20:35:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:04,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:05,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:35:05,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:05,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106724185] [2022-04-06 20:35:05,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106724185] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:05,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885328070] [2022-04-06 20:35:05,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:35:05,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:05,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:05,196 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:05,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-04-06 20:35:05,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:35:05,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:05,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:35:05,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:35:05,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:35:05,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885328070] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:05,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:05,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:35:05,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:05,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1173957793] [2022-04-06 20:35:05,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1173957793] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:05,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:05,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:35:05,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288004273] [2022-04-06 20:35:05,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:05,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:35:05,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:05,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:35:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1506, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:35:05,944 INFO L87 Difference]: Start difference. First operand 211 states and 272 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:06,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:06,750 INFO L93 Difference]: Finished difference Result 252 states and 313 transitions. [2022-04-06 20:35:06,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:35:06,751 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:35:06,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:06,751 INFO L225 Difference]: With dead ends: 252 [2022-04-06 20:35:06,751 INFO L226 Difference]: Without dead ends: 230 [2022-04-06 20:35:06,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=902, Invalid=3520, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:35:06,752 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:06,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 126 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:35:06,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-06 20:35:06,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 212. [2022-04-06 20:35:06,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.2995169082125604) internal successors, (269), 207 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:06,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 273 transitions. [2022-04-06 20:35:06,823 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 273 transitions. Word has length 48 [2022-04-06 20:35:06,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:06,824 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 273 transitions. [2022-04-06 20:35:06,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:06,824 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 273 transitions. [2022-04-06 20:35:06,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:35:06,824 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:06,824 INFO L499 BasicCegarLoop]: trace histogram [31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:06,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:07,041 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-04-06 20:35:07,042 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:07,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:07,042 INFO L85 PathProgramCache]: Analyzing trace with hash -518455826, now seen corresponding path program 245 times [2022-04-06 20:35:07,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:07,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1356946647] [2022-04-06 20:35:07,042 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:07,043 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:07,043 INFO L85 PathProgramCache]: Analyzing trace with hash -518455826, now seen corresponding path program 246 times [2022-04-06 20:35:07,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:07,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815569757] [2022-04-06 20:35:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:07,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:07,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:35:07,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:07,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815569757] [2022-04-06 20:35:07,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815569757] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:07,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527945402] [2022-04-06 20:35:07,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:35:07,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:07,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:07,525 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:07,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-04-06 20:35:07,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:35:07,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:07,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:35:07,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-04-06 20:35:07,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-04-06 20:35:07,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527945402] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:07,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:07,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 6, 6] total 43 [2022-04-06 20:35:07,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:07,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1356946647] [2022-04-06 20:35:07,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1356946647] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:07,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:07,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:35:07,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476563932] [2022-04-06 20:35:07,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:07,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:35:07,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:07,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:35:07,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1710, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:35:07,824 INFO L87 Difference]: Start difference. First operand 212 states and 273 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:09,675 INFO L93 Difference]: Finished difference Result 343 states and 503 transitions. [2022-04-06 20:35:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:35:09,676 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:35:09,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:09,677 INFO L225 Difference]: With dead ends: 343 [2022-04-06 20:35:09,677 INFO L226 Difference]: Without dead ends: 335 [2022-04-06 20:35:09,677 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=255, Invalid=5751, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:35:09,677 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 171 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5007 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 5142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 5007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:09,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 240 Invalid, 5142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 5007 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:35:09,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-04-06 20:35:09,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 218. [2022-04-06 20:35:09,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.300469483568075) internal successors, (277), 213 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 281 transitions. [2022-04-06 20:35:09,747 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 281 transitions. Word has length 48 [2022-04-06 20:35:09,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:09,747 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 281 transitions. [2022-04-06 20:35:09,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:09,747 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 281 transitions. [2022-04-06 20:35:09,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:35:09,748 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:09,748 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:09,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-04-06 20:35:09,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-04-06 20:35:09,963 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:09,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash -195947921, now seen corresponding path program 247 times [2022-04-06 20:35:09,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:09,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2139524633] [2022-04-06 20:35:09,964 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:09,964 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash -195947921, now seen corresponding path program 248 times [2022-04-06 20:35:09,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:09,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057513051] [2022-04-06 20:35:09,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:09,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:10,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:35:10,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:10,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057513051] [2022-04-06 20:35:10,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057513051] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:10,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116909479] [2022-04-06 20:35:10,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:10,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:10,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:10,220 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:10,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-04-06 20:35:10,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:10,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:10,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 20:35:10,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:35:10,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:35:11,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116909479] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:11,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:11,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 26] total 64 [2022-04-06 20:35:11,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:11,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2139524633] [2022-04-06 20:35:11,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2139524633] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:11,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:11,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:35:11,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650254826] [2022-04-06 20:35:11,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:11,222 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:35:11,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:11,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:35:11,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=3569, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:35:11,222 INFO L87 Difference]: Start difference. First operand 218 states and 281 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:11,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:11,953 INFO L93 Difference]: Finished difference Result 251 states and 314 transitions. [2022-04-06 20:35:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:35:11,954 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:35:11,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:11,954 INFO L225 Difference]: With dead ends: 251 [2022-04-06 20:35:11,954 INFO L226 Difference]: Without dead ends: 233 [2022-04-06 20:35:11,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=767, Invalid=7065, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:35:11,955 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:11,955 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 88 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:35:11,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-04-06 20:35:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 219. [2022-04-06 20:35:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.2990654205607477) internal successors, (278), 214 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 282 transitions. [2022-04-06 20:35:12,033 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 282 transitions. Word has length 49 [2022-04-06 20:35:12,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:12,033 INFO L478 AbstractCegarLoop]: Abstraction has 219 states and 282 transitions. [2022-04-06 20:35:12,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:12,033 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 282 transitions. [2022-04-06 20:35:12,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:35:12,033 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:12,033 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:12,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:12,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-04-06 20:35:12,250 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:12,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:12,250 INFO L85 PathProgramCache]: Analyzing trace with hash 106712255, now seen corresponding path program 249 times [2022-04-06 20:35:12,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:12,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [747618758] [2022-04-06 20:35:12,251 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:12,251 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:12,251 INFO L85 PathProgramCache]: Analyzing trace with hash 106712255, now seen corresponding path program 250 times [2022-04-06 20:35:12,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:12,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134080112] [2022-04-06 20:35:12,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:12,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:12,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:35:12,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:12,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134080112] [2022-04-06 20:35:12,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134080112] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:12,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442354237] [2022-04-06 20:35:12,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:35:12,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:12,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:12,461 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:12,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-04-06 20:35:12,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:35:12,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:12,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:35:12,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:35:12,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:35:13,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442354237] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:13,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:13,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:35:13,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:13,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [747618758] [2022-04-06 20:35:13,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [747618758] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:13,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:13,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:35:13,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127490197] [2022-04-06 20:35:13,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:13,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:35:13,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:13,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:35:13,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2257, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:35:13,087 INFO L87 Difference]: Start difference. First operand 219 states and 282 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:13,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:13,843 INFO L93 Difference]: Finished difference Result 254 states and 317 transitions. [2022-04-06 20:35:13,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:35:13,843 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:35:13,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:13,844 INFO L225 Difference]: With dead ends: 254 [2022-04-06 20:35:13,844 INFO L226 Difference]: Without dead ends: 235 [2022-04-06 20:35:13,845 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1219, Invalid=5921, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:35:13,845 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:13,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:35:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-04-06 20:35:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 220. [2022-04-06 20:35:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.2976744186046512) internal successors, (279), 215 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 283 transitions. [2022-04-06 20:35:13,921 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 283 transitions. Word has length 49 [2022-04-06 20:35:13,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:13,921 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 283 transitions. [2022-04-06 20:35:13,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:13,921 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 283 transitions. [2022-04-06 20:35:13,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:35:13,922 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:13,922 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:13,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-04-06 20:35:14,137 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:14,137 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:14,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:14,137 INFO L85 PathProgramCache]: Analyzing trace with hash 987779247, now seen corresponding path program 251 times [2022-04-06 20:35:14,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:14,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [860974711] [2022-04-06 20:35:14,138 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:14,138 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:14,138 INFO L85 PathProgramCache]: Analyzing trace with hash 987779247, now seen corresponding path program 252 times [2022-04-06 20:35:14,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:14,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101001076] [2022-04-06 20:35:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:14,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:14,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:35:14,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:14,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101001076] [2022-04-06 20:35:14,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101001076] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:14,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784427371] [2022-04-06 20:35:14,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:35:14,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:14,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:14,455 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:14,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-04-06 20:35:14,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:35:14,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:14,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:35:14,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:35:15,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:35:15,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784427371] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:15,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:15,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:35:15,647 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:15,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [860974711] [2022-04-06 20:35:15,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [860974711] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:15,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:15,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:35:15,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179650138] [2022-04-06 20:35:15,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:15,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:35:15,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:15,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:35:15,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2058, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:35:15,648 INFO L87 Difference]: Start difference. First operand 220 states and 283 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:16,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:16,370 INFO L93 Difference]: Finished difference Result 257 states and 320 transitions. [2022-04-06 20:35:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:35:16,371 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:35:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:16,371 INFO L225 Difference]: With dead ends: 257 [2022-04-06 20:35:16,371 INFO L226 Difference]: Without dead ends: 237 [2022-04-06 20:35:16,371 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1311, Invalid=5999, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:35:16,372 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:16,372 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 102 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:35:16,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-04-06 20:35:16,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 221. [2022-04-06 20:35:16,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.2962962962962963) internal successors, (280), 216 states have internal predecessors, (280), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 284 transitions. [2022-04-06 20:35:16,443 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 284 transitions. Word has length 49 [2022-04-06 20:35:16,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:16,444 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 284 transitions. [2022-04-06 20:35:16,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 284 transitions. [2022-04-06 20:35:16,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:35:16,444 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:16,445 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:16,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:16,649 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:16,649 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:16,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:16,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1899606401, now seen corresponding path program 253 times [2022-04-06 20:35:16,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:16,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1645360075] [2022-04-06 20:35:16,650 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:16,650 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:16,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1899606401, now seen corresponding path program 254 times [2022-04-06 20:35:16,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:16,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632964655] [2022-04-06 20:35:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:16,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:16,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:35:16,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:16,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632964655] [2022-04-06 20:35:16,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632964655] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:16,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388068219] [2022-04-06 20:35:16,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:16,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:16,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:16,917 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:16,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-04-06 20:35:16,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:16,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:16,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:35:16,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:35:17,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:35:17,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388068219] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:17,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:17,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:35:17,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:17,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1645360075] [2022-04-06 20:35:17,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1645360075] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:17,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:17,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:35:17,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390407507] [2022-04-06 20:35:17,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:17,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:35:17,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:17,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:35:17,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1865, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:35:17,554 INFO L87 Difference]: Start difference. First operand 221 states and 284 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:18,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:18,364 INFO L93 Difference]: Finished difference Result 260 states and 323 transitions. [2022-04-06 20:35:18,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:35:18,364 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:35:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:18,365 INFO L225 Difference]: With dead ends: 260 [2022-04-06 20:35:18,365 INFO L226 Difference]: Without dead ends: 239 [2022-04-06 20:35:18,365 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1237, Invalid=5405, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:35:18,365 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:18,365 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 109 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:35:18,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-04-06 20:35:18,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 222. [2022-04-06 20:35:18,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.294930875576037) internal successors, (281), 217 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 285 transitions. [2022-04-06 20:35:18,439 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 285 transitions. Word has length 49 [2022-04-06 20:35:18,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:18,439 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 285 transitions. [2022-04-06 20:35:18,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:18,439 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 285 transitions. [2022-04-06 20:35:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:35:18,439 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:18,440 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:18,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:18,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2022-04-06 20:35:18,656 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:18,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:18,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1634267409, now seen corresponding path program 255 times [2022-04-06 20:35:18,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:18,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [28707694] [2022-04-06 20:35:18,657 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:18,657 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:18,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1634267409, now seen corresponding path program 256 times [2022-04-06 20:35:18,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:18,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72551429] [2022-04-06 20:35:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:18,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:18,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:35:18,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:18,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72551429] [2022-04-06 20:35:18,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72551429] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:18,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91971389] [2022-04-06 20:35:18,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:35:18,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:18,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:18,932 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:18,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-04-06 20:35:18,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:35:18,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:18,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:35:18,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:35:19,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:35:19,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91971389] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:19,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:19,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:35:19,626 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:19,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [28707694] [2022-04-06 20:35:19,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [28707694] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:19,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:19,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:35:19,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340669607] [2022-04-06 20:35:19,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:19,626 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:35:19,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:19,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:35:19,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:35:19,627 INFO L87 Difference]: Start difference. First operand 222 states and 285 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:20,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:20,242 INFO L93 Difference]: Finished difference Result 263 states and 326 transitions. [2022-04-06 20:35:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:35:20,242 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:35:20,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:20,242 INFO L225 Difference]: With dead ends: 263 [2022-04-06 20:35:20,242 INFO L226 Difference]: Without dead ends: 241 [2022-04-06 20:35:20,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1033, Invalid=4223, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:35:20,243 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:20,243 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 122 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:35:20,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-04-06 20:35:20,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 223. [2022-04-06 20:35:20,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.2935779816513762) internal successors, (282), 218 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:20,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 286 transitions. [2022-04-06 20:35:20,315 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 286 transitions. Word has length 49 [2022-04-06 20:35:20,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:20,315 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 286 transitions. [2022-04-06 20:35:20,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:20,316 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 286 transitions. [2022-04-06 20:35:20,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:35:20,316 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:20,316 INFO L499 BasicCegarLoop]: trace histogram [32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:20,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:20,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:20,531 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:20,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:20,531 INFO L85 PathProgramCache]: Analyzing trace with hash 564187407, now seen corresponding path program 257 times [2022-04-06 20:35:20,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:20,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1630841039] [2022-04-06 20:35:20,532 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:20,532 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:20,532 INFO L85 PathProgramCache]: Analyzing trace with hash 564187407, now seen corresponding path program 258 times [2022-04-06 20:35:20,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:20,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475777271] [2022-04-06 20:35:20,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:20,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:20,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:35:20,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:20,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475777271] [2022-04-06 20:35:20,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475777271] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:20,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007260047] [2022-04-06 20:35:20,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:35:20,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:20,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:20,937 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:20,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-04-06 20:35:20,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:35:20,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:20,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:35:20,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-04-06 20:35:21,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-04-06 20:35:21,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007260047] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:21,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:21,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 6, 6] total 44 [2022-04-06 20:35:21,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:21,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1630841039] [2022-04-06 20:35:21,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1630841039] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:21,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:21,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:35:21,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295550568] [2022-04-06 20:35:21,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:21,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:35:21,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:21,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:35:21,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1794, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:35:21,268 INFO L87 Difference]: Start difference. First operand 223 states and 286 transitions. Second operand has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:22,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:22,933 INFO L93 Difference]: Finished difference Result 355 states and 518 transitions. [2022-04-06 20:35:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:35:22,934 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:35:22,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:22,934 INFO L225 Difference]: With dead ends: 355 [2022-04-06 20:35:22,934 INFO L226 Difference]: Without dead ends: 347 [2022-04-06 20:35:22,935 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=261, Invalid=6059, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:35:22,935 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 179 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5211 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 5350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 5211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:22,935 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 243 Invalid, 5350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 5211 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:35:22,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-04-06 20:35:23,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 229. [2022-04-06 20:35:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2946428571428572) internal successors, (290), 224 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:23,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 294 transitions. [2022-04-06 20:35:23,012 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 294 transitions. Word has length 49 [2022-04-06 20:35:23,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:23,012 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 294 transitions. [2022-04-06 20:35:23,012 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:23,012 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 294 transitions. [2022-04-06 20:35:23,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:35:23,013 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:23,013 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:23,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:23,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:23,228 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:23,228 INFO L85 PathProgramCache]: Analyzing trace with hash 938139085, now seen corresponding path program 259 times [2022-04-06 20:35:23,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:23,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1409585584] [2022-04-06 20:35:23,229 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:23,229 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:23,229 INFO L85 PathProgramCache]: Analyzing trace with hash 938139085, now seen corresponding path program 260 times [2022-04-06 20:35:23,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:23,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834288360] [2022-04-06 20:35:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:23,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:23,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:35:23,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:23,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834288360] [2022-04-06 20:35:23,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834288360] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:23,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895710206] [2022-04-06 20:35:23,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:23,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:23,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:23,451 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:23,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-04-06 20:35:23,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:23,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:23,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 20:35:23,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:35:23,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:35:23,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895710206] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:23,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:23,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 20 [2022-04-06 20:35:23,634 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:23,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1409585584] [2022-04-06 20:35:23,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1409585584] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:23,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:23,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:35:23,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445234538] [2022-04-06 20:35:23,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:23,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:35:23,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:23,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:35:23,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:35:23,635 INFO L87 Difference]: Start difference. First operand 229 states and 294 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:24,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:24,733 INFO L93 Difference]: Finished difference Result 809 states and 1087 transitions. [2022-04-06 20:35:24,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:35:24,733 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:35:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:24,734 INFO L225 Difference]: With dead ends: 809 [2022-04-06 20:35:24,734 INFO L226 Difference]: Without dead ends: 791 [2022-04-06 20:35:24,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:35:24,734 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 47 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:24,735 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 124 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:35:24,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-04-06 20:35:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 233. [2022-04-06 20:35:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.2982456140350878) internal successors, (296), 228 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 300 transitions. [2022-04-06 20:35:24,816 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 300 transitions. Word has length 50 [2022-04-06 20:35:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:24,816 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 300 transitions. [2022-04-06 20:35:24,816 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:24,816 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 300 transitions. [2022-04-06 20:35:24,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:35:24,816 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:24,816 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:24,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:25,017 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-04-06 20:35:25,017 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:25,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:25,017 INFO L85 PathProgramCache]: Analyzing trace with hash 618158975, now seen corresponding path program 261 times [2022-04-06 20:35:25,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:25,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1327790515] [2022-04-06 20:35:25,018 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:25,018 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:25,018 INFO L85 PathProgramCache]: Analyzing trace with hash 618158975, now seen corresponding path program 262 times [2022-04-06 20:35:25,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:25,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932755383] [2022-04-06 20:35:25,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:25,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:25,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:35:25,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:25,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932755383] [2022-04-06 20:35:25,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932755383] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:25,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797110410] [2022-04-06 20:35:25,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:35:25,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:25,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:25,240 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:25,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-04-06 20:35:25,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:35:25,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:25,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 20:35:25,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:35:25,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 20:35:26,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797110410] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:26,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:26,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 24] total 61 [2022-04-06 20:35:26,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:26,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1327790515] [2022-04-06 20:35:26,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1327790515] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:26,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:26,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:35:26,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885043823] [2022-04-06 20:35:26,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:26,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:35:26,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:26,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:35:26,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=3247, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:35:26,113 INFO L87 Difference]: Start difference. First operand 233 states and 300 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:27,044 INFO L93 Difference]: Finished difference Result 268 states and 335 transitions. [2022-04-06 20:35:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:35:27,044 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:35:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:27,045 INFO L225 Difference]: With dead ends: 268 [2022-04-06 20:35:27,045 INFO L226 Difference]: Without dead ends: 249 [2022-04-06 20:35:27,045 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=866, Invalid=8254, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 20:35:27,046 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:27,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 140 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:35:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-04-06 20:35:27,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 234. [2022-04-06 20:35:27,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.296943231441048) internal successors, (297), 229 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:27,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 301 transitions. [2022-04-06 20:35:27,131 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 301 transitions. Word has length 50 [2022-04-06 20:35:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:27,131 INFO L478 AbstractCegarLoop]: Abstraction has 234 states and 301 transitions. [2022-04-06 20:35:27,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 301 transitions. [2022-04-06 20:35:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:35:27,131 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:27,131 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:27,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-04-06 20:35:27,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-04-06 20:35:27,348 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:27,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:27,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2033330125, now seen corresponding path program 263 times [2022-04-06 20:35:27,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:27,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [31434692] [2022-04-06 20:35:27,349 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:27,349 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:27,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2033330125, now seen corresponding path program 264 times [2022-04-06 20:35:27,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:27,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987681743] [2022-04-06 20:35:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:27,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:27,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:35:27,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:27,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987681743] [2022-04-06 20:35:27,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987681743] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:27,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225691703] [2022-04-06 20:35:27,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:35:27,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:27,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:27,675 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:27,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-04-06 20:35:28,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:35:28,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:28,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:35:28,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:35:28,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:35:28,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225691703] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:28,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:28,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:35:28,709 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:28,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [31434692] [2022-04-06 20:35:28,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [31434692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:28,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:28,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:35:28,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447924197] [2022-04-06 20:35:28,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:28,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:35:28,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:28,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:35:28,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=2242, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:35:28,710 INFO L87 Difference]: Start difference. First operand 234 states and 301 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:29,522 INFO L93 Difference]: Finished difference Result 271 states and 338 transitions. [2022-04-06 20:35:29,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:35:29,522 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:35:29,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:29,523 INFO L225 Difference]: With dead ends: 271 [2022-04-06 20:35:29,523 INFO L226 Difference]: Without dead ends: 251 [2022-04-06 20:35:29,523 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1433, Invalid=6757, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:35:29,524 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:29,524 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 107 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:35:29,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-04-06 20:35:29,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2022-04-06 20:35:29,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.2956521739130435) internal successors, (298), 230 states have internal predecessors, (298), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 302 transitions. [2022-04-06 20:35:29,605 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 302 transitions. Word has length 50 [2022-04-06 20:35:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:29,605 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 302 transitions. [2022-04-06 20:35:29,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 302 transitions. [2022-04-06 20:35:29,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:35:29,606 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:29,606 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:29,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-04-06 20:35:29,809 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-04-06 20:35:29,809 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:29,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:29,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1252468353, now seen corresponding path program 265 times [2022-04-06 20:35:29,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:29,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1051211825] [2022-04-06 20:35:29,810 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:29,810 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:29,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1252468353, now seen corresponding path program 266 times [2022-04-06 20:35:29,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:29,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063910044] [2022-04-06 20:35:29,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:29,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:30,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:35:30,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:30,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063910044] [2022-04-06 20:35:30,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063910044] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:30,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351050197] [2022-04-06 20:35:30,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:30,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:30,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:30,049 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:30,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-04-06 20:35:30,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:30,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:30,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:35:30,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:35:30,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:35:30,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351050197] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:30,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:30,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:35:30,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:30,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1051211825] [2022-04-06 20:35:30,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1051211825] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:30,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:30,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:35:30,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248127092] [2022-04-06 20:35:30,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:30,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:35:30,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:30,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:35:30,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=2041, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:35:30,666 INFO L87 Difference]: Start difference. First operand 235 states and 302 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:31,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:31,643 INFO L93 Difference]: Finished difference Result 274 states and 341 transitions. [2022-04-06 20:35:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:35:31,643 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:35:31,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:31,644 INFO L225 Difference]: With dead ends: 274 [2022-04-06 20:35:31,644 INFO L226 Difference]: Without dead ends: 253 [2022-04-06 20:35:31,644 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1396, Invalid=6260, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:35:31,644 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:31,644 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 129 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:35:31,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-04-06 20:35:31,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 236. [2022-04-06 20:35:31,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.2943722943722944) internal successors, (299), 231 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:31,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 303 transitions. [2022-04-06 20:35:31,731 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 303 transitions. Word has length 50 [2022-04-06 20:35:31,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:31,731 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 303 transitions. [2022-04-06 20:35:31,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 303 transitions. [2022-04-06 20:35:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:35:31,731 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:31,731 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:31,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:31,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:31,947 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:31,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:31,947 INFO L85 PathProgramCache]: Analyzing trace with hash -168697395, now seen corresponding path program 267 times [2022-04-06 20:35:31,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:31,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [322389536] [2022-04-06 20:35:31,948 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:31,948 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:31,948 INFO L85 PathProgramCache]: Analyzing trace with hash -168697395, now seen corresponding path program 268 times [2022-04-06 20:35:31,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:31,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377690740] [2022-04-06 20:35:31,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:31,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:32,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:35:32,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:32,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377690740] [2022-04-06 20:35:32,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377690740] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:32,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338549446] [2022-04-06 20:35:32,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:35:32,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:32,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:32,233 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:32,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-04-06 20:35:32,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:35:32,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:32,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:35:32,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:35:32,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:35:33,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338549446] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:33,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:33,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:35:33,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:33,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [322389536] [2022-04-06 20:35:33,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [322389536] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:33,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:33,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:35:33,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376604822] [2022-04-06 20:35:33,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:33,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:35:33,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:33,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:35:33,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1844, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:35:33,093 INFO L87 Difference]: Start difference. First operand 236 states and 303 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:33,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:33,879 INFO L93 Difference]: Finished difference Result 277 states and 344 transitions. [2022-04-06 20:35:33,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:35:33,879 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:35:33,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:33,880 INFO L225 Difference]: With dead ends: 277 [2022-04-06 20:35:33,880 INFO L226 Difference]: Without dead ends: 255 [2022-04-06 20:35:33,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1204, Invalid=5116, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:35:33,880 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:33,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 136 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:35:33,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-04-06 20:35:33,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 237. [2022-04-06 20:35:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.293103448275862) internal successors, (300), 232 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 304 transitions. [2022-04-06 20:35:33,969 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 304 transitions. Word has length 50 [2022-04-06 20:35:33,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:33,969 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 304 transitions. [2022-04-06 20:35:33,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:33,969 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 304 transitions. [2022-04-06 20:35:33,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:35:33,969 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:33,969 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:33,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-04-06 20:35:34,170 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-04-06 20:35:34,170 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:34,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:34,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1351555201, now seen corresponding path program 269 times [2022-04-06 20:35:34,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:34,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [170359922] [2022-04-06 20:35:34,171 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:34,171 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:34,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1351555201, now seen corresponding path program 270 times [2022-04-06 20:35:34,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:34,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421435431] [2022-04-06 20:35:34,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:34,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:34,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:35:34,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:34,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421435431] [2022-04-06 20:35:34,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421435431] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:34,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111726518] [2022-04-06 20:35:34,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:35:34,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:34,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:34,373 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:34,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-04-06 20:35:34,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:35:34,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:34,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:35:34,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-04-06 20:35:34,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-04-06 20:35:34,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111726518] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:34,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:34,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8, 8] total 33 [2022-04-06 20:35:34,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:34,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [170359922] [2022-04-06 20:35:34,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [170359922] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:34,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:34,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:35:34,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368935234] [2022-04-06 20:35:34,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:34,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:35:34,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:34,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:35:34,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:35:34,782 INFO L87 Difference]: Start difference. First operand 237 states and 304 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:35,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:35,437 INFO L93 Difference]: Finished difference Result 280 states and 347 transitions. [2022-04-06 20:35:35,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:35:35,437 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:35:35,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:35,438 INFO L225 Difference]: With dead ends: 280 [2022-04-06 20:35:35,438 INFO L226 Difference]: Without dead ends: 257 [2022-04-06 20:35:35,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=2965, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:35:35,438 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 53 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:35,438 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 129 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:35:35,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-04-06 20:35:35,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 238. [2022-04-06 20:35:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.2918454935622317) internal successors, (301), 233 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:35,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 305 transitions. [2022-04-06 20:35:35,525 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 305 transitions. Word has length 50 [2022-04-06 20:35:35,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:35,525 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 305 transitions. [2022-04-06 20:35:35,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:35,525 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 305 transitions. [2022-04-06 20:35:35,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:35:35,525 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:35,525 INFO L499 BasicCegarLoop]: trace histogram [33, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:35,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:35,728 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-04-06 20:35:35,728 INFO L403 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:35,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:35,729 INFO L85 PathProgramCache]: Analyzing trace with hash -233610738, now seen corresponding path program 271 times [2022-04-06 20:35:35,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:35,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [396210488] [2022-04-06 20:35:35,729 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:35,729 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:35,729 INFO L85 PathProgramCache]: Analyzing trace with hash -233610738, now seen corresponding path program 272 times [2022-04-06 20:35:35,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:35,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284018531] [2022-04-06 20:35:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:35,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:36,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 562 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:35:36,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:36,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284018531] [2022-04-06 20:35:36,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284018531] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:36,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048291506] [2022-04-06 20:35:36,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:36,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:36,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:36,346 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:36,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-04-06 20:35:36,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:36,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:36,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:35:36,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 562 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:35:36,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 562 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:35:38,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048291506] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:38,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:38,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 20:35:38,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:38,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [396210488] [2022-04-06 20:35:38,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [396210488] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:38,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:38,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:35:38,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439434872] [2022-04-06 20:35:38,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:38,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:35:38,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:38,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:35:38,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1311, Invalid=4389, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:35:38,017 INFO L87 Difference]: Start difference. First operand 238 states and 305 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:39,719 INFO L93 Difference]: Finished difference Result 385 states and 565 transitions. [2022-04-06 20:35:39,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:35:39,719 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:35:39,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:39,720 INFO L225 Difference]: With dead ends: 385 [2022-04-06 20:35:39,720 INFO L226 Difference]: Without dead ends: 377 [2022-04-06 20:35:39,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2729, Invalid=9927, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 20:35:39,720 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 187 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 5573 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 5716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 5573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:39,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 251 Invalid, 5716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 5573 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:35:39,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-04-06 20:35:39,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 244. [2022-04-06 20:35:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.292887029288703) internal successors, (309), 239 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 313 transitions. [2022-04-06 20:35:39,810 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 313 transitions. Word has length 50 [2022-04-06 20:35:39,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:39,810 INFO L478 AbstractCegarLoop]: Abstraction has 244 states and 313 transitions. [2022-04-06 20:35:39,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:39,810 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 313 transitions. [2022-04-06 20:35:39,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:35:39,810 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:39,810 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:39,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:40,016 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:40,016 INFO L403 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:40,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:40,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1735097903, now seen corresponding path program 273 times [2022-04-06 20:35:40,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:40,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1144934345] [2022-04-06 20:35:40,017 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:40,017 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:40,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1735097903, now seen corresponding path program 274 times [2022-04-06 20:35:40,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:40,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841520244] [2022-04-06 20:35:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:40,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:40,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:35:40,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:40,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841520244] [2022-04-06 20:35:40,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841520244] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:40,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784368087] [2022-04-06 20:35:40,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:35:40,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:40,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:40,312 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:40,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-04-06 20:35:40,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:35:40,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:40,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 20:35:40,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:35:40,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:35:41,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784368087] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:41,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:41,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 68 [2022-04-06 20:35:41,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:41,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1144934345] [2022-04-06 20:35:41,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1144934345] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:41,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:41,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:35:41,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324230558] [2022-04-06 20:35:41,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:41,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:35:41,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:41,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:35:41,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=3890, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:35:41,554 INFO L87 Difference]: Start difference. First operand 244 states and 313 transitions. Second operand has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:42,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:42,150 INFO L93 Difference]: Finished difference Result 262 states and 330 transitions. [2022-04-06 20:35:42,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:35:42,150 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:35:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:42,151 INFO L225 Difference]: With dead ends: 262 [2022-04-06 20:35:42,151 INFO L226 Difference]: Without dead ends: 229 [2022-04-06 20:35:42,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1290, Invalid=7452, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:35:42,152 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:42,152 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:35:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-04-06 20:35:42,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-04-06 20:35:42,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.3035714285714286) internal successors, (292), 224 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 296 transitions. [2022-04-06 20:35:42,233 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 296 transitions. Word has length 51 [2022-04-06 20:35:42,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:42,233 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 296 transitions. [2022-04-06 20:35:42,233 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:42,233 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 296 transitions. [2022-04-06 20:35:42,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:35:42,233 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:42,233 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:42,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:42,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:42,448 INFO L403 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:42,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:42,448 INFO L85 PathProgramCache]: Analyzing trace with hash -706861889, now seen corresponding path program 275 times [2022-04-06 20:35:42,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:42,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [496699914] [2022-04-06 20:35:42,449 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:42,449 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:42,449 INFO L85 PathProgramCache]: Analyzing trace with hash -706861889, now seen corresponding path program 276 times [2022-04-06 20:35:42,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:42,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19752524] [2022-04-06 20:35:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:42,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:42,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:35:42,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:42,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19752524] [2022-04-06 20:35:42,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19752524] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:42,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285057290] [2022-04-06 20:35:42,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:35:42,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:42,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:42,693 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:42,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-04-06 20:35:43,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:35:43,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:43,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 20:35:43,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:35:43,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 24 proven. 132 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:35:44,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285057290] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:44,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:44,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 26] total 65 [2022-04-06 20:35:44,156 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:44,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [496699914] [2022-04-06 20:35:44,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [496699914] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:44,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:44,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:35:44,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102874648] [2022-04-06 20:35:44,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:44,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:35:44,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:44,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:35:44,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=3692, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:35:44,157 INFO L87 Difference]: Start difference. First operand 229 states and 296 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:44,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:44,943 INFO L93 Difference]: Finished difference Result 264 states and 331 transitions. [2022-04-06 20:35:44,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:35:44,943 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:35:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:44,944 INFO L225 Difference]: With dead ends: 264 [2022-04-06 20:35:44,944 INFO L226 Difference]: Without dead ends: 245 [2022-04-06 20:35:44,944 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=778, Invalid=7412, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:35:44,944 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:44,944 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 93 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:35:44,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-04-06 20:35:45,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 230. [2022-04-06 20:35:45,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.3022222222222222) internal successors, (293), 225 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:45,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 297 transitions. [2022-04-06 20:35:45,032 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 297 transitions. Word has length 51 [2022-04-06 20:35:45,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:45,032 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 297 transitions. [2022-04-06 20:35:45,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:45,032 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 297 transitions. [2022-04-06 20:35:45,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:35:45,032 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:45,032 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:45,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-04-06 20:35:45,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:45,235 INFO L403 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:45,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:45,236 INFO L85 PathProgramCache]: Analyzing trace with hash 85668975, now seen corresponding path program 277 times [2022-04-06 20:35:45,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:45,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1015186927] [2022-04-06 20:35:45,236 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:45,236 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:45,236 INFO L85 PathProgramCache]: Analyzing trace with hash 85668975, now seen corresponding path program 278 times [2022-04-06 20:35:45,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:45,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555997237] [2022-04-06 20:35:45,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:45,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:45,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:35:45,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:45,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555997237] [2022-04-06 20:35:45,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555997237] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:45,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124048788] [2022-04-06 20:35:45,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:45,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:45,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:45,587 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:45,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-04-06 20:35:45,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:45,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:45,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 20:35:45,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:35:45,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:35:46,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124048788] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:46,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:46,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 20:35:46,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:46,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1015186927] [2022-04-06 20:35:46,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1015186927] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:46,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:46,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:35:46,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065864927] [2022-04-06 20:35:46,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:46,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:35:46,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:46,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:35:46,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=2432, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:35:46,466 INFO L87 Difference]: Start difference. First operand 230 states and 297 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:47,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:47,250 INFO L93 Difference]: Finished difference Result 267 states and 334 transitions. [2022-04-06 20:35:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:35:47,250 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:35:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:47,251 INFO L225 Difference]: With dead ends: 267 [2022-04-06 20:35:47,251 INFO L226 Difference]: Without dead ends: 247 [2022-04-06 20:35:47,251 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1310, Invalid=6346, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:35:47,251 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:47,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 130 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:35:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-04-06 20:35:47,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 231. [2022-04-06 20:35:47,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.3008849557522124) internal successors, (294), 226 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:47,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 298 transitions. [2022-04-06 20:35:47,331 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 298 transitions. Word has length 51 [2022-04-06 20:35:47,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:47,331 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 298 transitions. [2022-04-06 20:35:47,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:47,331 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 298 transitions. [2022-04-06 20:35:47,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:35:47,331 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:47,331 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:47,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-04-06 20:35:47,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:47,539 INFO L403 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:47,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:47,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1628941951, now seen corresponding path program 279 times [2022-04-06 20:35:47,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:47,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1968860338] [2022-04-06 20:35:47,540 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:47,540 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:47,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1628941951, now seen corresponding path program 280 times [2022-04-06 20:35:47,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:47,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146698711] [2022-04-06 20:35:47,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:47,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:47,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:35:47,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:47,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146698711] [2022-04-06 20:35:47,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146698711] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:47,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656910070] [2022-04-06 20:35:47,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:35:47,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:47,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:47,781 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:47,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-04-06 20:35:47,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:35:47,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:47,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:35:47,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:35:47,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:35:48,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656910070] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:48,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:48,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:35:48,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:48,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1968860338] [2022-04-06 20:35:48,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1968860338] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:48,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:48,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:35:48,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851078263] [2022-04-06 20:35:48,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:48,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:35:48,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:48,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:35:48,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=2223, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:35:48,407 INFO L87 Difference]: Start difference. First operand 231 states and 298 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:49,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:49,231 INFO L93 Difference]: Finished difference Result 270 states and 337 transitions. [2022-04-06 20:35:49,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:35:49,232 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:35:49,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:49,232 INFO L225 Difference]: With dead ends: 270 [2022-04-06 20:35:49,232 INFO L226 Difference]: Without dead ends: 249 [2022-04-06 20:35:49,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1407, Invalid=6425, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:35:49,233 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:49,233 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 137 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:35:49,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-04-06 20:35:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 232. [2022-04-06 20:35:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.2995594713656389) internal successors, (295), 227 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 299 transitions. [2022-04-06 20:35:49,319 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 299 transitions. Word has length 51 [2022-04-06 20:35:49,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:49,319 INFO L478 AbstractCegarLoop]: Abstraction has 232 states and 299 transitions. [2022-04-06 20:35:49,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 299 transitions. [2022-04-06 20:35:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:35:49,320 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:49,320 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:49,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-04-06 20:35:49,528 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-04-06 20:35:49,528 INFO L403 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:49,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:49,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1980667217, now seen corresponding path program 281 times [2022-04-06 20:35:49,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:49,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1365156174] [2022-04-06 20:35:49,529 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:49,529 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:49,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1980667217, now seen corresponding path program 282 times [2022-04-06 20:35:49,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:49,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105780469] [2022-04-06 20:35:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:49,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:49,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:35:49,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:49,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105780469] [2022-04-06 20:35:49,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105780469] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:49,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034349214] [2022-04-06 20:35:49,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:35:49,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:49,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:49,844 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:49,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-04-06 20:35:51,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:35:51,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:51,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 20:35:51,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:35:51,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:35:52,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034349214] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:52,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:52,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:35:52,390 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:52,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1365156174] [2022-04-06 20:35:52,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1365156174] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:52,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:52,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:35:52,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367275380] [2022-04-06 20:35:52,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:52,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:35:52,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:52,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:35:52,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=2022, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:35:52,391 INFO L87 Difference]: Start difference. First operand 232 states and 299 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:53,203 INFO L93 Difference]: Finished difference Result 273 states and 340 transitions. [2022-04-06 20:35:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:35:53,203 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:35:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:53,203 INFO L225 Difference]: With dead ends: 273 [2022-04-06 20:35:53,203 INFO L226 Difference]: Without dead ends: 251 [2022-04-06 20:35:53,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1329, Invalid=5811, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:35:53,204 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:53,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 114 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:35:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-04-06 20:35:53,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 233. [2022-04-06 20:35:53,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.2982456140350878) internal successors, (296), 228 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:53,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 300 transitions. [2022-04-06 20:35:53,287 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 300 transitions. Word has length 51 [2022-04-06 20:35:53,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:53,287 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 300 transitions. [2022-04-06 20:35:53,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:53,287 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 300 transitions. [2022-04-06 20:35:53,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:35:53,287 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:53,287 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:53,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-04-06 20:35:53,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-04-06 20:35:53,491 INFO L403 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:53,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:53,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1949874239, now seen corresponding path program 283 times [2022-04-06 20:35:53,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:53,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1338889347] [2022-04-06 20:35:53,492 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:53,492 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:53,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1949874239, now seen corresponding path program 284 times [2022-04-06 20:35:53,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:53,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198447831] [2022-04-06 20:35:53,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:53,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:53,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:35:53,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:53,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198447831] [2022-04-06 20:35:53,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198447831] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:53,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034007017] [2022-04-06 20:35:53,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:53,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:53,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:53,679 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:53,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-04-06 20:35:53,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:53,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:53,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:35:53,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:35:53,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:35:54,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034007017] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:54,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:54,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:35:54,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:54,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1338889347] [2022-04-06 20:35:54,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1338889347] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:54,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:54,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:35:54,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198716440] [2022-04-06 20:35:54,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:54,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:35:54,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:54,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:35:54,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1819, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:35:54,407 INFO L87 Difference]: Start difference. First operand 233 states and 300 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:55,070 INFO L93 Difference]: Finished difference Result 276 states and 343 transitions. [2022-04-06 20:35:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:35:55,071 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:35:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:55,071 INFO L225 Difference]: With dead ends: 276 [2022-04-06 20:35:55,071 INFO L226 Difference]: Without dead ends: 253 [2022-04-06 20:35:55,071 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1121, Invalid=4579, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:35:55,072 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:55,072 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 122 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:35:55,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-04-06 20:35:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 234. [2022-04-06 20:35:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.296943231441048) internal successors, (297), 229 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:55,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 301 transitions. [2022-04-06 20:35:55,155 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 301 transitions. Word has length 51 [2022-04-06 20:35:55,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:55,156 INFO L478 AbstractCegarLoop]: Abstraction has 234 states and 301 transitions. [2022-04-06 20:35:55,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:55,156 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 301 transitions. [2022-04-06 20:35:55,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:35:55,156 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:55,156 INFO L499 BasicCegarLoop]: trace histogram [34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:55,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:55,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-04-06 20:35:55,372 INFO L403 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:55,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash 804450543, now seen corresponding path program 285 times [2022-04-06 20:35:55,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:55,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1332604330] [2022-04-06 20:35:55,373 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:55,373 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:55,373 INFO L85 PathProgramCache]: Analyzing trace with hash 804450543, now seen corresponding path program 286 times [2022-04-06 20:35:55,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:55,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616351132] [2022-04-06 20:35:55,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:55,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:56,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 596 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:35:56,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:56,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616351132] [2022-04-06 20:35:56,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616351132] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:56,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430737204] [2022-04-06 20:35:56,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:35:56,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:56,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:56,026 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:56,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-04-06 20:35:56,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:35:56,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:56,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 20:35:56,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 596 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:35:56,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 596 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:35:57,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430737204] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:57,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:57,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-06 20:35:57,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:57,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1332604330] [2022-04-06 20:35:57,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1332604330] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:57,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:57,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:35:57,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920912472] [2022-04-06 20:35:57,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:57,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:35:57,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:57,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:35:57,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1384, Invalid=4622, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:35:57,821 INFO L87 Difference]: Start difference. First operand 234 states and 301 transitions. Second operand has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:59,609 INFO L93 Difference]: Finished difference Result 382 states and 563 transitions. [2022-04-06 20:35:59,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:35:59,610 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:35:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:59,610 INFO L225 Difference]: With dead ends: 382 [2022-04-06 20:35:59,610 INFO L226 Difference]: Without dead ends: 374 [2022-04-06 20:35:59,611 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2878, Invalid=10462, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 20:35:59,611 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 187 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 5966 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 6113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 5966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:59,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 261 Invalid, 6113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 5966 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:35:59,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-04-06 20:35:59,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 240. [2022-04-06 20:35:59,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.297872340425532) internal successors, (305), 235 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:59,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 309 transitions. [2022-04-06 20:35:59,698 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 309 transitions. Word has length 51 [2022-04-06 20:35:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:59,698 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 309 transitions. [2022-04-06 20:35:59,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:59,698 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 309 transitions. [2022-04-06 20:35:59,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:35:59,698 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:59,698 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:59,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-04-06 20:35:59,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:59,906 INFO L403 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:59,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:59,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1167164287, now seen corresponding path program 287 times [2022-04-06 20:35:59,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:59,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2056145186] [2022-04-06 20:35:59,907 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:59,907 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:59,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1167164287, now seen corresponding path program 288 times [2022-04-06 20:35:59,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:59,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958407362] [2022-04-06 20:35:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:59,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:00,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:36:00,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:00,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958407362] [2022-04-06 20:36:00,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958407362] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:00,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140512218] [2022-04-06 20:36:00,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:00,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:00,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:00,309 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:00,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-04-06 20:36:00,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:36:00,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:00,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 20:36:00,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:36:01,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:36:02,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140512218] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:02,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:02,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 28] total 69 [2022-04-06 20:36:02,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:02,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2056145186] [2022-04-06 20:36:02,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2056145186] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:02,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:02,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:36:02,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198852374] [2022-04-06 20:36:02,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:02,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:36:02,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:02,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:36:02,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=4165, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:36:02,280 INFO L87 Difference]: Start difference. First operand 240 states and 309 transitions. Second operand has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:03,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:03,288 INFO L93 Difference]: Finished difference Result 275 states and 344 transitions. [2022-04-06 20:36:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:36:03,289 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:36:03,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:03,289 INFO L225 Difference]: With dead ends: 275 [2022-04-06 20:36:03,289 INFO L226 Difference]: Without dead ends: 256 [2022-04-06 20:36:03,290 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=869, Invalid=8251, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 20:36:03,290 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:03,290 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 138 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:36:03,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-04-06 20:36:03,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 241. [2022-04-06 20:36:03,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.2966101694915255) internal successors, (306), 236 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 310 transitions. [2022-04-06 20:36:03,382 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 310 transitions. Word has length 52 [2022-04-06 20:36:03,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:03,382 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 310 transitions. [2022-04-06 20:36:03,382 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:03,382 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 310 transitions. [2022-04-06 20:36:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:36:03,382 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:03,383 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:03,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:03,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:03,587 INFO L403 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:03,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:03,587 INFO L85 PathProgramCache]: Analyzing trace with hash -162284531, now seen corresponding path program 289 times [2022-04-06 20:36:03,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:03,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [858110256] [2022-04-06 20:36:03,588 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:03,588 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:03,588 INFO L85 PathProgramCache]: Analyzing trace with hash -162284531, now seen corresponding path program 290 times [2022-04-06 20:36:03,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:03,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712274733] [2022-04-06 20:36:03,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:03,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:03,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:36:03,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:03,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712274733] [2022-04-06 20:36:03,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712274733] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:03,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297491556] [2022-04-06 20:36:03,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:03,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:03,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:03,971 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:03,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-04-06 20:36:04,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:04,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:04,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:36:04,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:36:04,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:36:04,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297491556] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:04,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:04,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 20:36:04,745 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:04,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [858110256] [2022-04-06 20:36:04,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [858110256] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:04,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:04,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:36:04,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696801784] [2022-04-06 20:36:04,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:04,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:36:04,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:04,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:36:04,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=2628, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:36:04,746 INFO L87 Difference]: Start difference. First operand 241 states and 310 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:05,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:05,607 INFO L93 Difference]: Finished difference Result 278 states and 347 transitions. [2022-04-06 20:36:05,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:36:05,607 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:36:05,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:05,609 INFO L225 Difference]: With dead ends: 278 [2022-04-06 20:36:05,609 INFO L226 Difference]: Without dead ends: 258 [2022-04-06 20:36:05,610 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1410, Invalid=6962, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:36:05,610 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:05,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 145 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:36:05,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-04-06 20:36:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 242. [2022-04-06 20:36:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 237 states have (on average 1.2953586497890295) internal successors, (307), 237 states have internal predecessors, (307), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 311 transitions. [2022-04-06 20:36:05,701 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 311 transitions. Word has length 52 [2022-04-06 20:36:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:05,701 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 311 transitions. [2022-04-06 20:36:05,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 311 transitions. [2022-04-06 20:36:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:36:05,702 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:05,702 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:05,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:05,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-04-06 20:36:05,915 INFO L403 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:05,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:05,916 INFO L85 PathProgramCache]: Analyzing trace with hash 758348159, now seen corresponding path program 291 times [2022-04-06 20:36:05,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:05,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [618937626] [2022-04-06 20:36:05,916 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:05,916 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:05,916 INFO L85 PathProgramCache]: Analyzing trace with hash 758348159, now seen corresponding path program 292 times [2022-04-06 20:36:05,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:05,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804346555] [2022-04-06 20:36:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:05,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:06,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:36:06,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:06,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804346555] [2022-04-06 20:36:06,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804346555] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:06,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630683334] [2022-04-06 20:36:06,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:06,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:06,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:06,158 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:06,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-04-06 20:36:06,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:06,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:06,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 20:36:06,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:36:06,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:36:07,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630683334] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:07,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:07,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 20:36:07,095 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:07,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [618937626] [2022-04-06 20:36:07,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [618937626] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:07,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:07,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:36:07,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747306287] [2022-04-06 20:36:07,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:07,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:36:07,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:07,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:36:07,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=2415, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:36:07,096 INFO L87 Difference]: Start difference. First operand 242 states and 311 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:08,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:08,120 INFO L93 Difference]: Finished difference Result 281 states and 350 transitions. [2022-04-06 20:36:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:36:08,120 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:36:08,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:08,120 INFO L225 Difference]: With dead ends: 281 [2022-04-06 20:36:08,120 INFO L226 Difference]: Without dead ends: 260 [2022-04-06 20:36:08,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1535, Invalid=7207, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:36:08,121 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:08,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 122 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1495 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:36:08,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-04-06 20:36:08,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 243. [2022-04-06 20:36:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2941176470588236) internal successors, (308), 238 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 312 transitions. [2022-04-06 20:36:08,207 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 312 transitions. Word has length 52 [2022-04-06 20:36:08,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:08,207 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 312 transitions. [2022-04-06 20:36:08,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:08,207 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 312 transitions. [2022-04-06 20:36:08,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:36:08,207 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:08,207 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:08,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-04-06 20:36:08,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:08,423 INFO L403 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:08,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:08,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1977810445, now seen corresponding path program 293 times [2022-04-06 20:36:08,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:08,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1404211966] [2022-04-06 20:36:08,424 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:08,424 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:08,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1977810445, now seen corresponding path program 294 times [2022-04-06 20:36:08,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:08,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030265359] [2022-04-06 20:36:08,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:08,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:08,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:36:08,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:08,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030265359] [2022-04-06 20:36:08,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030265359] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:08,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830494846] [2022-04-06 20:36:08,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:08,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:08,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:08,640 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:08,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-04-06 20:36:09,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:36:09,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:09,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:36:09,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:36:09,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:36:10,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830494846] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:10,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:10,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:36:10,044 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:10,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1404211966] [2022-04-06 20:36:10,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1404211966] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:10,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:10,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:36:10,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511750385] [2022-04-06 20:36:10,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:10,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:36:10,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:10,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:36:10,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=2206, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:36:10,045 INFO L87 Difference]: Start difference. First operand 243 states and 312 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:10,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:10,889 INFO L93 Difference]: Finished difference Result 284 states and 353 transitions. [2022-04-06 20:36:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:36:10,889 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:36:10,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:10,890 INFO L225 Difference]: With dead ends: 284 [2022-04-06 20:36:10,890 INFO L226 Difference]: Without dead ends: 262 [2022-04-06 20:36:10,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1492, Invalid=6698, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:36:10,891 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:10,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 119 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:36:10,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-04-06 20:36:10,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 244. [2022-04-06 20:36:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.292887029288703) internal successors, (309), 239 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 313 transitions. [2022-04-06 20:36:10,983 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 313 transitions. Word has length 52 [2022-04-06 20:36:10,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:10,983 INFO L478 AbstractCegarLoop]: Abstraction has 244 states and 313 transitions. [2022-04-06 20:36:10,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:10,983 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 313 transitions. [2022-04-06 20:36:10,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:36:10,983 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:10,983 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:10,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-04-06 20:36:11,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:11,186 INFO L403 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:11,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:11,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1214971775, now seen corresponding path program 295 times [2022-04-06 20:36:11,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:11,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [87916887] [2022-04-06 20:36:11,187 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:11,187 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:11,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1214971775, now seen corresponding path program 296 times [2022-04-06 20:36:11,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:11,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324857068] [2022-04-06 20:36:11,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:11,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:11,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:36:11,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:11,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324857068] [2022-04-06 20:36:11,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324857068] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:11,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860889441] [2022-04-06 20:36:11,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:11,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:11,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:11,508 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:11,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-04-06 20:36:11,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:11,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:11,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:36:11,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:36:11,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:36:12,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860889441] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:12,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:12,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:36:12,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:12,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [87916887] [2022-04-06 20:36:12,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [87916887] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:12,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:12,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:36:12,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996366240] [2022-04-06 20:36:12,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:12,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:36:12,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:12,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:36:12,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1999, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:36:12,204 INFO L87 Difference]: Start difference. First operand 244 states and 313 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:12,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:12,973 INFO L93 Difference]: Finished difference Result 287 states and 356 transitions. [2022-04-06 20:36:12,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:36:12,973 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:36:12,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:12,974 INFO L225 Difference]: With dead ends: 287 [2022-04-06 20:36:12,974 INFO L226 Difference]: Without dead ends: 264 [2022-04-06 20:36:12,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1297, Invalid=5509, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:36:12,974 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:12,974 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 136 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:36:12,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-04-06 20:36:13,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 245. [2022-04-06 20:36:13,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.2916666666666667) internal successors, (310), 240 states have internal predecessors, (310), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 314 transitions. [2022-04-06 20:36:13,062 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 314 transitions. Word has length 52 [2022-04-06 20:36:13,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:13,062 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 314 transitions. [2022-04-06 20:36:13,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 314 transitions. [2022-04-06 20:36:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:36:13,063 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:13,063 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:13,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-04-06 20:36:13,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:13,265 INFO L403 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:13,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1093881843, now seen corresponding path program 297 times [2022-04-06 20:36:13,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:13,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [877828667] [2022-04-06 20:36:13,266 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:13,266 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:13,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1093881843, now seen corresponding path program 298 times [2022-04-06 20:36:13,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:13,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103863442] [2022-04-06 20:36:13,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:13,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:13,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:36:13,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:13,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103863442] [2022-04-06 20:36:13,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103863442] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:13,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219547753] [2022-04-06 20:36:13,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:13,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:13,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:13,536 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:13,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-04-06 20:36:13,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:13,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:13,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:36:13,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:36:13,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:36:14,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219547753] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:14,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:14,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:36:14,160 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:14,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [877828667] [2022-04-06 20:36:14,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [877828667] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:14,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:14,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:36:14,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284533487] [2022-04-06 20:36:14,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:14,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:36:14,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:14,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:36:14,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=1790, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:36:14,161 INFO L87 Difference]: Start difference. First operand 245 states and 314 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:14,833 INFO L93 Difference]: Finished difference Result 290 states and 359 transitions. [2022-04-06 20:36:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:36:14,833 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:36:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:14,833 INFO L225 Difference]: With dead ends: 290 [2022-04-06 20:36:14,833 INFO L226 Difference]: Without dead ends: 266 [2022-04-06 20:36:14,834 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1074, Invalid=4182, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:36:14,834 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 53 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:14,834 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 139 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:36:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-04-06 20:36:14,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 246. [2022-04-06 20:36:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.2904564315352698) internal successors, (311), 241 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 315 transitions. [2022-04-06 20:36:14,928 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 315 transitions. Word has length 52 [2022-04-06 20:36:14,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:14,928 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 315 transitions. [2022-04-06 20:36:14,928 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:14,928 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 315 transitions. [2022-04-06 20:36:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:36:14,928 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:14,928 INFO L499 BasicCegarLoop]: trace histogram [35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:14,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:15,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:15,137 INFO L403 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:15,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:15,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1375388114, now seen corresponding path program 299 times [2022-04-06 20:36:15,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:15,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [376389579] [2022-04-06 20:36:15,138 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:15,138 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:15,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1375388114, now seen corresponding path program 300 times [2022-04-06 20:36:15,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:15,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818815642] [2022-04-06 20:36:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:15,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:15,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:15,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:15,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818815642] [2022-04-06 20:36:15,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818815642] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:15,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178959060] [2022-04-06 20:36:15,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:15,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:15,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:15,609 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:15,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-04-06 20:36:15,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:36:15,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:15,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:36:15,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-04-06 20:36:15,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-04-06 20:36:15,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178959060] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:15,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:15,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 6, 6] total 47 [2022-04-06 20:36:15,877 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:15,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [376389579] [2022-04-06 20:36:15,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [376389579] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:15,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:15,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:36:15,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709151269] [2022-04-06 20:36:15,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:15,877 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:36:15,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:15,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:36:15,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2058, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:36:15,878 INFO L87 Difference]: Start difference. First operand 246 states and 315 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:18,019 INFO L93 Difference]: Finished difference Result 395 states and 579 transitions. [2022-04-06 20:36:18,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:36:18,019 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:36:18,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:18,020 INFO L225 Difference]: With dead ends: 395 [2022-04-06 20:36:18,020 INFO L226 Difference]: Without dead ends: 387 [2022-04-06 20:36:18,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=279, Invalid=7031, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:36:18,020 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 195 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 6354 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 6505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 6354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:18,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 269 Invalid, 6505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 6354 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:36:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-04-06 20:36:18,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 252. [2022-04-06 20:36:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.291497975708502) internal successors, (319), 247 states have internal predecessors, (319), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 323 transitions. [2022-04-06 20:36:18,115 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 323 transitions. Word has length 52 [2022-04-06 20:36:18,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:18,116 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 323 transitions. [2022-04-06 20:36:18,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:18,116 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 323 transitions. [2022-04-06 20:36:18,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:36:18,116 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:18,116 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:18,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-04-06 20:36:18,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:18,331 INFO L403 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:18,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:18,331 INFO L85 PathProgramCache]: Analyzing trace with hash -867566401, now seen corresponding path program 301 times [2022-04-06 20:36:18,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:18,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [717351413] [2022-04-06 20:36:18,332 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:18,332 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:18,332 INFO L85 PathProgramCache]: Analyzing trace with hash -867566401, now seen corresponding path program 302 times [2022-04-06 20:36:18,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:18,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241124142] [2022-04-06 20:36:18,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:18,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:18,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:36:18,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:18,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241124142] [2022-04-06 20:36:18,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241124142] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:18,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192052719] [2022-04-06 20:36:18,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:18,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:18,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:18,558 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:18,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-04-06 20:36:18,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:18,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:18,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 20:36:18,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:36:18,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:36:18,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192052719] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:18,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:18,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 21 [2022-04-06 20:36:18,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:18,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [717351413] [2022-04-06 20:36:18,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [717351413] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:18,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:18,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:36:18,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032321634] [2022-04-06 20:36:18,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:18,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:36:18,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:18,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:36:18,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:36:18,757 INFO L87 Difference]: Start difference. First operand 252 states and 323 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:20,079 INFO L93 Difference]: Finished difference Result 935 states and 1259 transitions. [2022-04-06 20:36:20,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:36:20,079 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:36:20,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:20,081 INFO L225 Difference]: With dead ends: 935 [2022-04-06 20:36:20,081 INFO L226 Difference]: Without dead ends: 916 [2022-04-06 20:36:20,081 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:36:20,081 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 50 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:20,081 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 132 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:36:20,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-04-06 20:36:20,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 256. [2022-04-06 20:36:20,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.294820717131474) internal successors, (325), 251 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:20,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 329 transitions. [2022-04-06 20:36:20,181 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 329 transitions. Word has length 53 [2022-04-06 20:36:20,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:20,181 INFO L478 AbstractCegarLoop]: Abstraction has 256 states and 329 transitions. [2022-04-06 20:36:20,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:20,181 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 329 transitions. [2022-04-06 20:36:20,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:36:20,181 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:20,181 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:20,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-04-06 20:36:20,397 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-04-06 20:36:20,397 INFO L403 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:20,397 INFO L85 PathProgramCache]: Analyzing trace with hash 741091375, now seen corresponding path program 303 times [2022-04-06 20:36:20,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:20,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [470245963] [2022-04-06 20:36:20,398 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:20,398 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:20,398 INFO L85 PathProgramCache]: Analyzing trace with hash 741091375, now seen corresponding path program 304 times [2022-04-06 20:36:20,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:20,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058716181] [2022-04-06 20:36:20,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:20,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:20,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:36:20,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:20,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058716181] [2022-04-06 20:36:20,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058716181] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:20,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344955733] [2022-04-06 20:36:20,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:20,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:20,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:20,756 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:20,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-04-06 20:36:20,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:20,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:20,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 20:36:20,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:36:21,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 20:36:21,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344955733] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:21,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:21,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 26] total 66 [2022-04-06 20:36:21,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:21,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [470245963] [2022-04-06 20:36:21,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [470245963] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:21,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:21,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:36:21,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944023422] [2022-04-06 20:36:21,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:21,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:36:21,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:21,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:36:21,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=3817, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:36:21,891 INFO L87 Difference]: Start difference. First operand 256 states and 329 transitions. Second operand has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:23,275 INFO L93 Difference]: Finished difference Result 293 states and 366 transitions. [2022-04-06 20:36:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:36:23,275 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:36:23,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:23,276 INFO L225 Difference]: With dead ends: 293 [2022-04-06 20:36:23,276 INFO L226 Difference]: Without dead ends: 273 [2022-04-06 20:36:23,276 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=990, Invalid=9722, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:36:23,276 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:23,276 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 130 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:36:23,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-04-06 20:36:23,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 257. [2022-04-06 20:36:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.2936507936507937) internal successors, (326), 252 states have internal predecessors, (326), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 330 transitions. [2022-04-06 20:36:23,373 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 330 transitions. Word has length 53 [2022-04-06 20:36:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:23,373 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 330 transitions. [2022-04-06 20:36:23,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 330 transitions. [2022-04-06 20:36:23,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:36:23,374 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:23,374 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:23,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:23,580 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:23,580 INFO L403 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:23,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:23,580 INFO L85 PathProgramCache]: Analyzing trace with hash -460255617, now seen corresponding path program 305 times [2022-04-06 20:36:23,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:23,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1958768656] [2022-04-06 20:36:23,581 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:23,581 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:23,581 INFO L85 PathProgramCache]: Analyzing trace with hash -460255617, now seen corresponding path program 306 times [2022-04-06 20:36:23,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:23,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083820817] [2022-04-06 20:36:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:23,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:23,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:36:23,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:23,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083820817] [2022-04-06 20:36:23,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083820817] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:23,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173787369] [2022-04-06 20:36:23,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:23,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:23,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:23,844 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:23,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-04-06 20:36:24,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:36:24,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:24,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 20:36:24,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:36:24,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:36:25,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173787369] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:25,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:25,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 20:36:25,574 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:25,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1958768656] [2022-04-06 20:36:25,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1958768656] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:25,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:25,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:36:25,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649830384] [2022-04-06 20:36:25,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:25,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:36:25,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:25,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:36:25,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=2613, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:36:25,575 INFO L87 Difference]: Start difference. First operand 257 states and 330 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:26,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:26,563 INFO L93 Difference]: Finished difference Result 296 states and 369 transitions. [2022-04-06 20:36:26,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:36:26,563 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:36:26,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:26,563 INFO L225 Difference]: With dead ends: 296 [2022-04-06 20:36:26,564 INFO L226 Difference]: Without dead ends: 275 [2022-04-06 20:36:26,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1668, Invalid=8034, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 20:36:26,564 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:26,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 142 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:36:26,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-04-06 20:36:26,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 258. [2022-04-06 20:36:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 253 states have (on average 1.2924901185770752) internal successors, (327), 253 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 331 transitions. [2022-04-06 20:36:26,666 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 331 transitions. Word has length 53 [2022-04-06 20:36:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:26,666 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 331 transitions. [2022-04-06 20:36:26,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 331 transitions. [2022-04-06 20:36:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:36:26,666 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:26,666 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:26,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:26,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-04-06 20:36:26,871 INFO L403 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:26,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash 136566383, now seen corresponding path program 307 times [2022-04-06 20:36:26,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:26,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [192245615] [2022-04-06 20:36:26,872 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:26,872 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash 136566383, now seen corresponding path program 308 times [2022-04-06 20:36:26,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:26,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542074383] [2022-04-06 20:36:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:26,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:27,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:36:27,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:27,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542074383] [2022-04-06 20:36:27,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542074383] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:27,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599267740] [2022-04-06 20:36:27,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:27,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:27,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:27,104 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:27,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-04-06 20:36:27,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:27,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:27,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 20:36:27,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:36:27,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:36:27,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599267740] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:27,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:27,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 20:36:27,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:27,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [192245615] [2022-04-06 20:36:27,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [192245615] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:27,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:27,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:36:27,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009414502] [2022-04-06 20:36:27,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:27,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:36:27,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:27,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:36:27,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=2396, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:36:27,818 INFO L87 Difference]: Start difference. First operand 258 states and 331 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:29,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:29,111 INFO L93 Difference]: Finished difference Result 299 states and 372 transitions. [2022-04-06 20:36:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:36:29,111 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:36:29,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:29,112 INFO L225 Difference]: With dead ends: 299 [2022-04-06 20:36:29,112 INFO L226 Difference]: Without dead ends: 277 [2022-04-06 20:36:29,112 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1665, Invalid=7647, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:36:29,112 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:29,112 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 124 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:36:29,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-04-06 20:36:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 259. [2022-04-06 20:36:29,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.2913385826771653) internal successors, (328), 254 states have internal predecessors, (328), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 332 transitions. [2022-04-06 20:36:29,214 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 332 transitions. Word has length 53 [2022-04-06 20:36:29,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:29,214 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 332 transitions. [2022-04-06 20:36:29,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 332 transitions. [2022-04-06 20:36:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:36:29,215 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:29,215 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:29,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-04-06 20:36:29,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-04-06 20:36:29,428 INFO L403 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:29,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:29,428 INFO L85 PathProgramCache]: Analyzing trace with hash -92168129, now seen corresponding path program 309 times [2022-04-06 20:36:29,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:29,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1700789751] [2022-04-06 20:36:29,429 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:29,429 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:29,429 INFO L85 PathProgramCache]: Analyzing trace with hash -92168129, now seen corresponding path program 310 times [2022-04-06 20:36:29,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:29,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201691563] [2022-04-06 20:36:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:29,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:29,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:36:29,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:29,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201691563] [2022-04-06 20:36:29,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201691563] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:29,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662043078] [2022-04-06 20:36:29,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:29,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:29,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:29,643 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:29,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-04-06 20:36:29,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:29,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:29,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:36:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:36:29,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:36:30,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662043078] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:30,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:30,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:36:30,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:30,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1700789751] [2022-04-06 20:36:30,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1700789751] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:30,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:30,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:36:30,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079724912] [2022-04-06 20:36:30,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:30,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:36:30,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:30,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:36:30,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=2185, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:36:30,289 INFO L87 Difference]: Start difference. First operand 259 states and 332 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:31,187 INFO L93 Difference]: Finished difference Result 302 states and 375 transitions. [2022-04-06 20:36:31,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:36:31,187 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:36:31,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:31,188 INFO L225 Difference]: With dead ends: 302 [2022-04-06 20:36:31,188 INFO L226 Difference]: Without dead ends: 279 [2022-04-06 20:36:31,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1487, Invalid=6523, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:36:31,188 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:31,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 131 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:36:31,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-04-06 20:36:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 260. [2022-04-06 20:36:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.2901960784313726) internal successors, (329), 255 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 333 transitions. [2022-04-06 20:36:31,295 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 333 transitions. Word has length 53 [2022-04-06 20:36:31,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:31,295 INFO L478 AbstractCegarLoop]: Abstraction has 260 states and 333 transitions. [2022-04-06 20:36:31,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:31,295 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 333 transitions. [2022-04-06 20:36:31,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:36:31,295 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:31,295 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:31,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:31,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-04-06 20:36:31,511 INFO L403 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:31,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:31,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1495532719, now seen corresponding path program 311 times [2022-04-06 20:36:31,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:31,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1168345128] [2022-04-06 20:36:31,512 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:31,512 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:31,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1495532719, now seen corresponding path program 312 times [2022-04-06 20:36:31,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:31,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846864514] [2022-04-06 20:36:31,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:31,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:31,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:36:31,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:31,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846864514] [2022-04-06 20:36:31,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846864514] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:31,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911844905] [2022-04-06 20:36:31,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:31,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:31,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:31,739 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:31,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-04-06 20:36:33,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:36:33,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:33,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:36:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 60 proven. 12 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:36:33,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 60 proven. 12 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:36:33,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911844905] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:33,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:33,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10, 10] total 38 [2022-04-06 20:36:33,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:33,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1168345128] [2022-04-06 20:36:33,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1168345128] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:33,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:33,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:36:33,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668936015] [2022-04-06 20:36:33,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:33,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:36:33,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:33,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:36:33,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:36:33,387 INFO L87 Difference]: Start difference. First operand 260 states and 333 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:34,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:34,240 INFO L93 Difference]: Finished difference Result 305 states and 378 transitions. [2022-04-06 20:36:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:36:34,240 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:36:34,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:34,241 INFO L225 Difference]: With dead ends: 305 [2022-04-06 20:36:34,241 INFO L226 Difference]: Without dead ends: 281 [2022-04-06 20:36:34,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=310, Invalid=4112, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:36:34,241 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 51 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:34,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 140 Invalid, 1677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:36:34,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-04-06 20:36:34,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 261. [2022-04-06 20:36:34,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.2890625) internal successors, (330), 256 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:34,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 334 transitions. [2022-04-06 20:36:34,348 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 334 transitions. Word has length 53 [2022-04-06 20:36:34,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:34,348 INFO L478 AbstractCegarLoop]: Abstraction has 261 states and 334 transitions. [2022-04-06 20:36:34,348 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:34,348 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 334 transitions. [2022-04-06 20:36:34,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:36:34,349 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:34,349 INFO L499 BasicCegarLoop]: trace histogram [36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:34,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-04-06 20:36:34,553 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:34,553 INFO L403 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:34,553 INFO L85 PathProgramCache]: Analyzing trace with hash -230909745, now seen corresponding path program 313 times [2022-04-06 20:36:34,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:34,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1279029977] [2022-04-06 20:36:34,554 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:34,554 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:34,554 INFO L85 PathProgramCache]: Analyzing trace with hash -230909745, now seen corresponding path program 314 times [2022-04-06 20:36:34,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:34,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23328025] [2022-04-06 20:36:34,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:34,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:35,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 667 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:35,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:35,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23328025] [2022-04-06 20:36:35,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23328025] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:35,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306925913] [2022-04-06 20:36:35,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:35,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:35,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:35,014 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:35,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-04-06 20:36:35,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:35,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:35,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 20:36:35,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 667 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:35,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 667 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:36,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306925913] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:36,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:36,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-04-06 20:36:36,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:36,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1279029977] [2022-04-06 20:36:36,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1279029977] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:36,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:36,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:36:36,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715416313] [2022-04-06 20:36:36,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:36,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:36:36,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:36:36,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1536, Invalid=5106, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:36:36,778 INFO L87 Difference]: Start difference. First operand 261 states and 334 transitions. Second operand has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 41 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:39,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:39,095 INFO L93 Difference]: Finished difference Result 426 states and 628 transitions. [2022-04-06 20:36:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:36:39,096 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 41 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:36:39,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:39,096 INFO L225 Difference]: With dead ends: 426 [2022-04-06 20:36:39,096 INFO L226 Difference]: Without dead ends: 418 [2022-04-06 20:36:39,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3188, Invalid=11574, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 20:36:39,097 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 203 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6754 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 6909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 6754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:39,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 277 Invalid, 6909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 6754 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:36:39,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-04-06 20:36:39,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 267. [2022-04-06 20:36:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.2900763358778626) internal successors, (338), 262 states have internal predecessors, (338), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 342 transitions. [2022-04-06 20:36:39,209 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 342 transitions. Word has length 53 [2022-04-06 20:36:39,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:39,209 INFO L478 AbstractCegarLoop]: Abstraction has 267 states and 342 transitions. [2022-04-06 20:36:39,209 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 41 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 342 transitions. [2022-04-06 20:36:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:36:39,210 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:39,210 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:39,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:39,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:39,425 INFO L403 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:39,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:39,426 INFO L85 PathProgramCache]: Analyzing trace with hash 480291711, now seen corresponding path program 315 times [2022-04-06 20:36:39,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:39,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1401111713] [2022-04-06 20:36:39,426 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:39,426 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:39,426 INFO L85 PathProgramCache]: Analyzing trace with hash 480291711, now seen corresponding path program 316 times [2022-04-06 20:36:39,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:39,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627377490] [2022-04-06 20:36:39,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:39,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:39,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:36:39,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:39,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627377490] [2022-04-06 20:36:39,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627377490] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:39,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898229805] [2022-04-06 20:36:39,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:39,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:39,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:39,690 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:39,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-04-06 20:36:39,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:39,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:39,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 20:36:39,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:36:40,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:36:40,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898229805] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:40,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:40,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 73 [2022-04-06 20:36:40,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:40,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1401111713] [2022-04-06 20:36:40,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1401111713] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:40,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:40,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:36:40,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739877613] [2022-04-06 20:36:40,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:40,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:36:40,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:40,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:36:40,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=4497, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:36:40,955 INFO L87 Difference]: Start difference. First operand 267 states and 342 transitions. Second operand has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 30 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:41,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:41,652 INFO L93 Difference]: Finished difference Result 286 states and 360 transitions. [2022-04-06 20:36:41,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:36:41,653 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 30 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:36:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:41,653 INFO L225 Difference]: With dead ends: 286 [2022-04-06 20:36:41,653 INFO L226 Difference]: Without dead ends: 251 [2022-04-06 20:36:41,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1473, Invalid=8627, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:36:41,655 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:41,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 156 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:36:41,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-04-06 20:36:41,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2022-04-06 20:36:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.3008130081300813) internal successors, (320), 246 states have internal predecessors, (320), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:41,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 324 transitions. [2022-04-06 20:36:41,754 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 324 transitions. Word has length 54 [2022-04-06 20:36:41,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:41,754 INFO L478 AbstractCegarLoop]: Abstraction has 251 states and 324 transitions. [2022-04-06 20:36:41,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 30 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:41,754 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 324 transitions. [2022-04-06 20:36:41,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:36:41,755 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:41,755 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:41,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:41,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:41,959 INFO L403 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:41,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:41,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1319026611, now seen corresponding path program 317 times [2022-04-06 20:36:41,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:41,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [835576812] [2022-04-06 20:36:41,960 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:41,960 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:41,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1319026611, now seen corresponding path program 318 times [2022-04-06 20:36:41,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:41,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780720189] [2022-04-06 20:36:41,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:41,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:42,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:36:42,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:42,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780720189] [2022-04-06 20:36:42,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780720189] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:42,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302441872] [2022-04-06 20:36:42,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:42,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:42,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:42,257 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:42,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-04-06 20:36:43,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:36:43,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:43,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 20:36:43,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:36:43,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 26 proven. 156 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:36:44,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302441872] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:44,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:44,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 28] total 70 [2022-04-06 20:36:44,417 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:44,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [835576812] [2022-04-06 20:36:44,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [835576812] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:44,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:44,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:36:44,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210349205] [2022-04-06 20:36:44,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:44,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:36:44,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:44,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:36:44,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=4298, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:36:44,418 INFO L87 Difference]: Start difference. First operand 251 states and 324 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:45,330 INFO L93 Difference]: Finished difference Result 288 states and 361 transitions. [2022-04-06 20:36:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:36:45,330 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:36:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:45,331 INFO L225 Difference]: With dead ends: 288 [2022-04-06 20:36:45,331 INFO L226 Difference]: Without dead ends: 268 [2022-04-06 20:36:45,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=880, Invalid=8626, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:36:45,332 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:45,332 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 123 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:36:45,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-04-06 20:36:45,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 252. [2022-04-06 20:36:45,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.2995951417004048) internal successors, (321), 247 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 325 transitions. [2022-04-06 20:36:45,432 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 325 transitions. Word has length 54 [2022-04-06 20:36:45,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:45,433 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 325 transitions. [2022-04-06 20:36:45,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:45,433 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 325 transitions. [2022-04-06 20:36:45,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:36:45,433 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:45,433 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:45,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:45,634 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:45,634 INFO L403 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:45,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:45,634 INFO L85 PathProgramCache]: Analyzing trace with hash 417732991, now seen corresponding path program 319 times [2022-04-06 20:36:45,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:45,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1580760663] [2022-04-06 20:36:45,635 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:45,635 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:45,635 INFO L85 PathProgramCache]: Analyzing trace with hash 417732991, now seen corresponding path program 320 times [2022-04-06 20:36:45,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:45,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967324507] [2022-04-06 20:36:45,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:45,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:45,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:36:45,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:45,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967324507] [2022-04-06 20:36:45,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967324507] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:45,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19656790] [2022-04-06 20:36:45,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:45,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:45,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:45,911 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:45,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-04-06 20:36:45,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:45,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:36:45,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:36:46,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:36:46,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19656790] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:46,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:46,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:36:46,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:46,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1580760663] [2022-04-06 20:36:46,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1580760663] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:46,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:46,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:36:46,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230719229] [2022-04-06 20:36:46,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:46,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:36:46,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:46,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:36:46,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2817, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:36:46,691 INFO L87 Difference]: Start difference. First operand 252 states and 325 transitions. Second operand has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:47,532 INFO L93 Difference]: Finished difference Result 291 states and 364 transitions. [2022-04-06 20:36:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:36:47,533 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:36:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:47,559 INFO L225 Difference]: With dead ends: 291 [2022-04-06 20:36:47,559 INFO L226 Difference]: Without dead ends: 270 [2022-04-06 20:36:47,560 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1507, Invalid=7423, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:36:47,560 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:47,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 115 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:36:47,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-04-06 20:36:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 253. [2022-04-06 20:36:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.2983870967741935) internal successors, (322), 248 states have internal predecessors, (322), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 326 transitions. [2022-04-06 20:36:47,667 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 326 transitions. Word has length 54 [2022-04-06 20:36:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:47,667 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 326 transitions. [2022-04-06 20:36:47,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 326 transitions. [2022-04-06 20:36:47,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:36:47,667 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:47,667 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:47,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:47,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:47,884 INFO L403 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:47,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1107424691, now seen corresponding path program 321 times [2022-04-06 20:36:47,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:47,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [802860664] [2022-04-06 20:36:47,885 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:47,885 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:47,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1107424691, now seen corresponding path program 322 times [2022-04-06 20:36:47,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:47,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613267547] [2022-04-06 20:36:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:47,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:48,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:36:48,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:48,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613267547] [2022-04-06 20:36:48,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613267547] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:48,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993730841] [2022-04-06 20:36:48,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:48,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:48,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:48,137 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:48,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-04-06 20:36:48,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:48,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:48,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:36:48,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:36:48,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:36:48,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993730841] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:48,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:48,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 20:36:48,917 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:48,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [802860664] [2022-04-06 20:36:48,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [802860664] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:48,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:48,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:36:48,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263595805] [2022-04-06 20:36:48,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:48,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:36:48,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:48,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:36:48,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=2594, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:36:48,918 INFO L87 Difference]: Start difference. First operand 253 states and 326 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:49,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:49,872 INFO L93 Difference]: Finished difference Result 294 states and 367 transitions. [2022-04-06 20:36:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:36:49,872 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:36:49,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:49,873 INFO L225 Difference]: With dead ends: 294 [2022-04-06 20:36:49,873 INFO L226 Difference]: Without dead ends: 272 [2022-04-06 20:36:49,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1641, Invalid=7671, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:36:49,874 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:49,874 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 122 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:36:49,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-04-06 20:36:49,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 254. [2022-04-06 20:36:49,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.2971887550200802) internal successors, (323), 249 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 327 transitions. [2022-04-06 20:36:49,976 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 327 transitions. Word has length 54 [2022-04-06 20:36:49,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:49,976 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 327 transitions. [2022-04-06 20:36:49,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:49,976 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 327 transitions. [2022-04-06 20:36:49,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:36:49,977 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:49,977 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:49,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:50,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:50,183 INFO L403 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:50,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:50,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1958799489, now seen corresponding path program 323 times [2022-04-06 20:36:50,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:50,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1743995971] [2022-04-06 20:36:50,184 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:50,184 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:50,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1958799489, now seen corresponding path program 324 times [2022-04-06 20:36:50,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:50,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154721061] [2022-04-06 20:36:50,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:50,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:50,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:36:50,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:50,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154721061] [2022-04-06 20:36:50,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154721061] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:50,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000095747] [2022-04-06 20:36:50,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:50,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:50,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:50,486 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:50,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-04-06 20:36:51,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 20:36:51,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:51,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 20:36:51,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:36:51,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:36:52,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000095747] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:52,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:52,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 20:36:52,388 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:52,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1743995971] [2022-04-06 20:36:52,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1743995971] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:52,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:52,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:36:52,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632002506] [2022-04-06 20:36:52,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:52,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:36:52,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:52,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:36:52,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=2377, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:36:52,389 INFO L87 Difference]: Start difference. First operand 254 states and 327 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:53,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:53,343 INFO L93 Difference]: Finished difference Result 297 states and 370 transitions. [2022-04-06 20:36:53,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:36:53,343 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:36:53,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:53,344 INFO L225 Difference]: With dead ends: 297 [2022-04-06 20:36:53,344 INFO L226 Difference]: Without dead ends: 274 [2022-04-06 20:36:53,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1592, Invalid=7150, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:36:53,345 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:53,345 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 149 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1833 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:36:53,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-04-06 20:36:53,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 255. [2022-04-06 20:36:53,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.296) internal successors, (324), 250 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:53,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 328 transitions. [2022-04-06 20:36:53,447 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 328 transitions. Word has length 54 [2022-04-06 20:36:53,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:53,447 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 328 transitions. [2022-04-06 20:36:53,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:53,447 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 328 transitions. [2022-04-06 20:36:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:36:53,447 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:53,447 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:53,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-04-06 20:36:53,653 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-04-06 20:36:53,653 INFO L403 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:53,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:53,653 INFO L85 PathProgramCache]: Analyzing trace with hash 163005517, now seen corresponding path program 325 times [2022-04-06 20:36:53,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:53,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1443416886] [2022-04-06 20:36:53,654 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:53,654 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:53,654 INFO L85 PathProgramCache]: Analyzing trace with hash 163005517, now seen corresponding path program 326 times [2022-04-06 20:36:53,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:53,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282775994] [2022-04-06 20:36:53,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:53,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:53,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:36:53,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:53,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282775994] [2022-04-06 20:36:53,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282775994] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:53,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651044403] [2022-04-06 20:36:53,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:53,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:53,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:53,911 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:53,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-04-06 20:36:53,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:53,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:53,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:36:53,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:36:54,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:36:54,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651044403] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:54,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:54,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:36:54,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:54,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1443416886] [2022-04-06 20:36:54,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1443416886] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:54,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:54,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:36:54,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019235900] [2022-04-06 20:36:54,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:54,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:36:54,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:54,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:36:54,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=2160, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:36:54,692 INFO L87 Difference]: Start difference. First operand 255 states and 328 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:55,692 INFO L93 Difference]: Finished difference Result 300 states and 373 transitions. [2022-04-06 20:36:55,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:36:55,692 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:36:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:55,692 INFO L225 Difference]: With dead ends: 300 [2022-04-06 20:36:55,692 INFO L226 Difference]: Without dead ends: 276 [2022-04-06 20:36:55,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1394, Invalid=5916, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:36:55,693 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:55,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 146 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1723 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:36:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-04-06 20:36:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 256. [2022-04-06 20:36:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.294820717131474) internal successors, (325), 251 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 329 transitions. [2022-04-06 20:36:55,795 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 329 transitions. Word has length 54 [2022-04-06 20:36:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:55,795 INFO L478 AbstractCegarLoop]: Abstraction has 256 states and 329 transitions. [2022-04-06 20:36:55,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 329 transitions. [2022-04-06 20:36:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:36:55,795 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:55,795 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:55,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:56,012 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-04-06 20:36:56,012 INFO L403 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:56,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:56,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1602987391, now seen corresponding path program 327 times [2022-04-06 20:36:56,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:56,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1403166589] [2022-04-06 20:36:56,013 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:56,013 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:56,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1602987391, now seen corresponding path program 328 times [2022-04-06 20:36:56,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:56,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190175864] [2022-04-06 20:36:56,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:56,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:56,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:36:56,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:56,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190175864] [2022-04-06 20:36:56,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190175864] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:56,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251022564] [2022-04-06 20:36:56,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:56,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:56,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:56,328 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:56,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-04-06 20:36:56,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:56,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:56,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:36:56,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:36:56,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:36:57,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251022564] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:57,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:57,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:36:57,050 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:57,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1403166589] [2022-04-06 20:36:57,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1403166589] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:57,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:57,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:36:57,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532485263] [2022-04-06 20:36:57,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:57,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:36:57,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:57,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:36:57,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=1941, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:36:57,058 INFO L87 Difference]: Start difference. First operand 256 states and 329 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:57,800 INFO L93 Difference]: Finished difference Result 303 states and 376 transitions. [2022-04-06 20:36:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:36:57,800 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:36:57,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:57,801 INFO L225 Difference]: With dead ends: 303 [2022-04-06 20:36:57,801 INFO L226 Difference]: Without dead ends: 278 [2022-04-06 20:36:57,801 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1166, Invalid=4534, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:36:57,801 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 53 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:57,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 144 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:36:57,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-04-06 20:36:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 257. [2022-04-06 20:36:57,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.2936507936507937) internal successors, (326), 252 states have internal predecessors, (326), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 330 transitions. [2022-04-06 20:36:57,908 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 330 transitions. Word has length 54 [2022-04-06 20:36:57,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:57,908 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 330 transitions. [2022-04-06 20:36:57,908 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:57,908 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 330 transitions. [2022-04-06 20:36:57,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:36:57,909 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:57,909 INFO L499 BasicCegarLoop]: trace histogram [37, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:57,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:58,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-04-06 20:36:58,125 INFO L403 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:58,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:58,125 INFO L85 PathProgramCache]: Analyzing trace with hash 888181326, now seen corresponding path program 329 times [2022-04-06 20:36:58,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:58,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [384536537] [2022-04-06 20:36:58,126 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:58,126 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:58,126 INFO L85 PathProgramCache]: Analyzing trace with hash 888181326, now seen corresponding path program 330 times [2022-04-06 20:36:58,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:58,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799319061] [2022-04-06 20:36:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:58,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:58,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 0 proven. 704 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:58,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:58,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799319061] [2022-04-06 20:36:58,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799319061] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:58,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757359128] [2022-04-06 20:36:58,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:58,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:58,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:58,607 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:58,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-04-06 20:36:58,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:36:58,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:58,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:36:58,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-04-06 20:36:58,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-04-06 20:36:58,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757359128] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:58,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:58,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 6, 6] total 49 [2022-04-06 20:36:58,859 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:58,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [384536537] [2022-04-06 20:36:58,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [384536537] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:58,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:58,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:36:58,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967313456] [2022-04-06 20:36:58,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:58,859 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:36:58,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:58,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:36:58,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2244, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:36:58,860 INFO L87 Difference]: Start difference. First operand 257 states and 330 transitions. Second operand has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:01,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:01,213 INFO L93 Difference]: Finished difference Result 423 states and 626 transitions. [2022-04-06 20:37:01,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:37:01,213 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:37:01,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:01,214 INFO L225 Difference]: With dead ends: 423 [2022-04-06 20:37:01,214 INFO L226 Difference]: Without dead ends: 415 [2022-04-06 20:37:01,214 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=291, Invalid=7719, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:37:01,214 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 203 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6835 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 6994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 6835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:01,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 277 Invalid, 6994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 6835 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:37:01,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-04-06 20:37:01,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 263. [2022-04-06 20:37:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.2945736434108528) internal successors, (334), 258 states have internal predecessors, (334), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 338 transitions. [2022-04-06 20:37:01,319 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 338 transitions. Word has length 54 [2022-04-06 20:37:01,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:01,319 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 338 transitions. [2022-04-06 20:37:01,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:01,319 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 338 transitions. [2022-04-06 20:37:01,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:37:01,319 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:01,319 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:01,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-04-06 20:37:01,533 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-04-06 20:37:01,533 INFO L403 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:01,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:01,533 INFO L85 PathProgramCache]: Analyzing trace with hash -758174737, now seen corresponding path program 331 times [2022-04-06 20:37:01,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:01,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [268111792] [2022-04-06 20:37:01,534 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:01,534 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:01,534 INFO L85 PathProgramCache]: Analyzing trace with hash -758174737, now seen corresponding path program 332 times [2022-04-06 20:37:01,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:01,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162279608] [2022-04-06 20:37:01,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:01,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:01,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:37:01,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:01,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162279608] [2022-04-06 20:37:01,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162279608] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:01,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973893966] [2022-04-06 20:37:01,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:01,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:01,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:01,825 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:01,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-04-06 20:37:01,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:01,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:01,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-06 20:37:01,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:37:02,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:37:03,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973893966] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:03,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:03,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 30] total 74 [2022-04-06 20:37:03,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:03,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [268111792] [2022-04-06 20:37:03,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [268111792] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:03,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:03,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:37:03,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519910626] [2022-04-06 20:37:03,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:03,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:37:03,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:37:03,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=4807, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:37:03,041 INFO L87 Difference]: Start difference. First operand 263 states and 338 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:04,155 INFO L93 Difference]: Finished difference Result 300 states and 375 transitions. [2022-04-06 20:37:04,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:37:04,156 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 20:37:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:04,156 INFO L225 Difference]: With dead ends: 300 [2022-04-06 20:37:04,156 INFO L226 Difference]: Without dead ends: 280 [2022-04-06 20:37:04,157 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=977, Invalid=9529, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:37:04,157 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:04,157 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 98 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:04,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-04-06 20:37:04,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 264. [2022-04-06 20:37:04,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.2934362934362935) internal successors, (335), 259 states have internal predecessors, (335), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 339 transitions. [2022-04-06 20:37:04,270 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 339 transitions. Word has length 55 [2022-04-06 20:37:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:04,270 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 339 transitions. [2022-04-06 20:37:04,270 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 339 transitions. [2022-04-06 20:37:04,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:37:04,270 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:04,270 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:04,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:04,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:04,479 INFO L403 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:04,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:04,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1865576063, now seen corresponding path program 333 times [2022-04-06 20:37:04,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:04,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1637735589] [2022-04-06 20:37:04,480 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:04,480 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:04,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1865576063, now seen corresponding path program 334 times [2022-04-06 20:37:04,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:04,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974341591] [2022-04-06 20:37:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:04,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:04,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:37:04,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:04,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974341591] [2022-04-06 20:37:04,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974341591] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:04,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651626581] [2022-04-06 20:37:04,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:04,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:04,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:04,766 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:04,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-04-06 20:37:04,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:04,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:04,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:37:04,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:37:04,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:37:05,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651626581] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:05,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:05,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:37:05,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:05,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1637735589] [2022-04-06 20:37:05,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1637735589] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:05,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:05,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:37:05,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552096136] [2022-04-06 20:37:05,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:05,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:37:05,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:05,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:37:05,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=3027, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:37:05,604 INFO L87 Difference]: Start difference. First operand 264 states and 339 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:06,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:06,640 INFO L93 Difference]: Finished difference Result 303 states and 378 transitions. [2022-04-06 20:37:06,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:37:06,641 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 20:37:06,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:06,641 INFO L225 Difference]: With dead ends: 303 [2022-04-06 20:37:06,641 INFO L226 Difference]: Without dead ends: 282 [2022-04-06 20:37:06,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1615, Invalid=8087, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 20:37:06,642 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:06,642 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 145 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:37:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-04-06 20:37:06,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 265. [2022-04-06 20:37:06,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.2923076923076924) internal successors, (336), 260 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:06,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 340 transitions. [2022-04-06 20:37:06,753 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 340 transitions. Word has length 55 [2022-04-06 20:37:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:06,753 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 340 transitions. [2022-04-06 20:37:06,753 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 340 transitions. [2022-04-06 20:37:06,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:37:06,753 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:06,753 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:06,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:06,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:06,967 INFO L403 AbstractCegarLoop]: === Iteration 173 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:06,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:06,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1016442321, now seen corresponding path program 335 times [2022-04-06 20:37:06,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:06,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2049455888] [2022-04-06 20:37:06,969 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:06,969 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:06,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1016442321, now seen corresponding path program 336 times [2022-04-06 20:37:06,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:06,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238297499] [2022-04-06 20:37:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:06,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:07,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:37:07,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:07,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238297499] [2022-04-06 20:37:07,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238297499] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:07,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117758178] [2022-04-06 20:37:07,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:07,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:07,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:07,220 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:07,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-04-06 20:37:08,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:37:08,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:08,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:37:08,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:37:08,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:37:08,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117758178] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:08,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:08,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:37:08,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:08,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2049455888] [2022-04-06 20:37:08,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2049455888] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:08,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:08,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:37:08,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067871217] [2022-04-06 20:37:08,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:08,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:37:08,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:08,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:37:08,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2800, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:37:08,735 INFO L87 Difference]: Start difference. First operand 265 states and 340 transitions. Second operand has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:09,843 INFO L93 Difference]: Finished difference Result 306 states and 381 transitions. [2022-04-06 20:37:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:37:09,843 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 20:37:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:09,843 INFO L225 Difference]: With dead ends: 306 [2022-04-06 20:37:09,844 INFO L226 Difference]: Without dead ends: 284 [2022-04-06 20:37:09,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1777, Invalid=8525, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:37:09,844 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:09,844 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 157 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:37:09,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-04-06 20:37:09,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 266. [2022-04-06 20:37:09,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.2911877394636015) internal successors, (337), 261 states have internal predecessors, (337), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:09,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 341 transitions. [2022-04-06 20:37:09,957 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 341 transitions. Word has length 55 [2022-04-06 20:37:09,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:09,957 INFO L478 AbstractCegarLoop]: Abstraction has 266 states and 341 transitions. [2022-04-06 20:37:09,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:09,957 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 341 transitions. [2022-04-06 20:37:09,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:37:09,957 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:09,957 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:09,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-04-06 20:37:10,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:10,161 INFO L403 AbstractCegarLoop]: === Iteration 174 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:10,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:10,161 INFO L85 PathProgramCache]: Analyzing trace with hash 305170495, now seen corresponding path program 337 times [2022-04-06 20:37:10,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:10,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [969758119] [2022-04-06 20:37:10,162 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:10,162 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:10,162 INFO L85 PathProgramCache]: Analyzing trace with hash 305170495, now seen corresponding path program 338 times [2022-04-06 20:37:10,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:10,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855732836] [2022-04-06 20:37:10,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:10,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:10,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:37:10,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:10,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855732836] [2022-04-06 20:37:10,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855732836] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:10,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104939286] [2022-04-06 20:37:10,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:10,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:10,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:10,434 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:10,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-04-06 20:37:10,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:10,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:10,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:37:10,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:37:10,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:37:11,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104939286] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:11,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:11,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 20:37:11,306 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:11,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [969758119] [2022-04-06 20:37:11,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [969758119] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:11,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:11,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:37:11,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899241252] [2022-04-06 20:37:11,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:11,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:37:11,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:11,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:37:11,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=2575, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:37:11,307 INFO L87 Difference]: Start difference. First operand 266 states and 341 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:12,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:12,312 INFO L93 Difference]: Finished difference Result 309 states and 384 transitions. [2022-04-06 20:37:12,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:37:12,312 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 20:37:12,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:12,312 INFO L225 Difference]: With dead ends: 309 [2022-04-06 20:37:12,312 INFO L226 Difference]: Without dead ends: 286 [2022-04-06 20:37:12,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1769, Invalid=8131, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:37:12,313 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:12,313 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 119 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1633 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:37:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-04-06 20:37:12,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 267. [2022-04-06 20:37:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.2900763358778626) internal successors, (338), 262 states have internal predecessors, (338), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 342 transitions. [2022-04-06 20:37:12,473 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 342 transitions. Word has length 55 [2022-04-06 20:37:12,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:12,473 INFO L478 AbstractCegarLoop]: Abstraction has 267 states and 342 transitions. [2022-04-06 20:37:12,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:12,473 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 342 transitions. [2022-04-06 20:37:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:37:12,473 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:12,473 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:12,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:12,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:12,687 INFO L403 AbstractCegarLoop]: === Iteration 175 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:12,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:12,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1804335215, now seen corresponding path program 339 times [2022-04-06 20:37:12,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:12,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1870579497] [2022-04-06 20:37:12,688 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:12,688 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:12,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1804335215, now seen corresponding path program 340 times [2022-04-06 20:37:12,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:12,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115273082] [2022-04-06 20:37:12,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:12,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:13,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:37:13,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:13,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115273082] [2022-04-06 20:37:13,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115273082] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:13,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268648726] [2022-04-06 20:37:13,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:13,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:13,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:13,044 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:13,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-04-06 20:37:13,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:13,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:13,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 20:37:13,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:37:13,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:37:13,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268648726] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:13,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:13,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 20:37:13,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:13,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1870579497] [2022-04-06 20:37:13,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1870579497] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:13,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:13,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:37:13,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890892702] [2022-04-06 20:37:13,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:13,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:37:13,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:13,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:37:13,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=2354, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:37:13,752 INFO L87 Difference]: Start difference. First operand 267 states and 342 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:14,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:14,642 INFO L93 Difference]: Finished difference Result 312 states and 387 transitions. [2022-04-06 20:37:14,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:37:14,642 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 20:37:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:14,646 INFO L225 Difference]: With dead ends: 312 [2022-04-06 20:37:14,646 INFO L226 Difference]: Without dead ends: 288 [2022-04-06 20:37:14,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1589, Invalid=6967, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:37:14,647 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:14,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 126 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:14,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-04-06 20:37:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 268. [2022-04-06 20:37:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.2889733840304183) internal successors, (339), 263 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 343 transitions. [2022-04-06 20:37:14,761 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 343 transitions. Word has length 55 [2022-04-06 20:37:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:14,761 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 343 transitions. [2022-04-06 20:37:14,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 343 transitions. [2022-04-06 20:37:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:37:14,761 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:14,761 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:14,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-04-06 20:37:14,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:14,967 INFO L403 AbstractCegarLoop]: === Iteration 176 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:14,968 INFO L85 PathProgramCache]: Analyzing trace with hash -516546049, now seen corresponding path program 341 times [2022-04-06 20:37:14,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:14,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1481275208] [2022-04-06 20:37:14,968 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:14,968 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:14,968 INFO L85 PathProgramCache]: Analyzing trace with hash -516546049, now seen corresponding path program 342 times [2022-04-06 20:37:14,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:14,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220759546] [2022-04-06 20:37:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:14,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:15,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:37:15,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:15,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220759546] [2022-04-06 20:37:15,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220759546] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:15,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947339172] [2022-04-06 20:37:15,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:15,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:15,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:15,198 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:15,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-04-06 20:37:16,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:37:16,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:16,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:37:16,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-04-06 20:37:16,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 65 proven. 11 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-04-06 20:37:16,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947339172] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:16,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:16,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10, 10] total 42 [2022-04-06 20:37:16,732 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:16,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1481275208] [2022-04-06 20:37:16,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1481275208] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:16,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:16,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:37:16,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174750113] [2022-04-06 20:37:16,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:16,732 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:37:16,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:16,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:37:16,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1579, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:37:16,732 INFO L87 Difference]: Start difference. First operand 268 states and 343 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:17,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:17,810 INFO L93 Difference]: Finished difference Result 315 states and 390 transitions. [2022-04-06 20:37:17,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:37:17,810 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 20:37:17,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:17,811 INFO L225 Difference]: With dead ends: 315 [2022-04-06 20:37:17,811 INFO L226 Difference]: Without dead ends: 290 [2022-04-06 20:37:17,811 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=359, Invalid=4753, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:37:17,811 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 51 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:17,811 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 150 Invalid, 1864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:37:17,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-04-06 20:37:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 269. [2022-04-06 20:37:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.2878787878787878) internal successors, (340), 264 states have internal predecessors, (340), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 344 transitions. [2022-04-06 20:37:17,925 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 344 transitions. Word has length 55 [2022-04-06 20:37:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:17,925 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 344 transitions. [2022-04-06 20:37:17,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 344 transitions. [2022-04-06 20:37:17,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:37:17,925 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:17,925 INFO L499 BasicCegarLoop]: trace histogram [38, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:17,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:18,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:18,130 INFO L403 AbstractCegarLoop]: === Iteration 177 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:18,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:18,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1220266159, now seen corresponding path program 343 times [2022-04-06 20:37:18,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:18,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [537928660] [2022-04-06 20:37:18,131 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:18,131 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:18,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1220266159, now seen corresponding path program 344 times [2022-04-06 20:37:18,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:18,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147975166] [2022-04-06 20:37:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:18,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:18,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:37:18,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:18,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147975166] [2022-04-06 20:37:18,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147975166] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:18,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878782722] [2022-04-06 20:37:18,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:18,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:18,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:18,784 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:18,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-04-06 20:37:18,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:18,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:18,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 20:37:18,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:37:18,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:37:20,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878782722] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:20,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:20,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-04-06 20:37:20,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:20,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [537928660] [2022-04-06 20:37:20,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [537928660] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:20,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:20,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:37:20,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395701390] [2022-04-06 20:37:20,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:20,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:37:20,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:20,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:37:20,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1696, Invalid=5614, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:37:20,453 INFO L87 Difference]: Start difference. First operand 269 states and 344 transitions. Second operand has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:23,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:23,089 INFO L93 Difference]: Finished difference Result 436 states and 642 transitions. [2022-04-06 20:37:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:37:23,090 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 20:37:23,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:23,090 INFO L225 Difference]: With dead ends: 436 [2022-04-06 20:37:23,091 INFO L226 Difference]: Without dead ends: 428 [2022-04-06 20:37:23,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3514, Invalid=12742, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 20:37:23,091 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 211 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 7429 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 7592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 7429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:23,091 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 290 Invalid, 7592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 7429 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:37:23,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-04-06 20:37:23,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 275. [2022-04-06 20:37:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.288888888888889) internal successors, (348), 270 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:23,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 352 transitions. [2022-04-06 20:37:23,202 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 352 transitions. Word has length 55 [2022-04-06 20:37:23,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:23,202 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 352 transitions. [2022-04-06 20:37:23,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 352 transitions. [2022-04-06 20:37:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:37:23,202 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:23,203 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:23,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:23,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2022-04-06 20:37:23,415 INFO L403 AbstractCegarLoop]: === Iteration 178 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:23,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:23,415 INFO L85 PathProgramCache]: Analyzing trace with hash -551635827, now seen corresponding path program 345 times [2022-04-06 20:37:23,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:23,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1811611475] [2022-04-06 20:37:23,416 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:23,416 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash -551635827, now seen corresponding path program 346 times [2022-04-06 20:37:23,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:23,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329072685] [2022-04-06 20:37:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:23,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:23,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:37:23,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:23,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329072685] [2022-04-06 20:37:23,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329072685] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:23,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822745653] [2022-04-06 20:37:23,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:23,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:23,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:23,641 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:23,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-04-06 20:37:23,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:23,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 20:37:23,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:37:23,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:37:23,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822745653] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:23,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:23,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 22 [2022-04-06 20:37:23,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:23,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1811611475] [2022-04-06 20:37:23,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1811611475] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:23,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:23,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:37:23,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365399353] [2022-04-06 20:37:23,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:23,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:37:23,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:23,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:37:23,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:37:23,842 INFO L87 Difference]: Start difference. First operand 275 states and 352 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:25,479 INFO L93 Difference]: Finished difference Result 1070 states and 1444 transitions. [2022-04-06 20:37:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:37:25,480 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 20:37:25,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:25,481 INFO L225 Difference]: With dead ends: 1070 [2022-04-06 20:37:25,481 INFO L226 Difference]: Without dead ends: 1050 [2022-04-06 20:37:25,482 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:37:25,482 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 53 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:25,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 140 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:37:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-04-06 20:37:25,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 279. [2022-04-06 20:37:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.2919708029197081) internal successors, (354), 274 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:25,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 358 transitions. [2022-04-06 20:37:25,622 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 358 transitions. Word has length 56 [2022-04-06 20:37:25,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:25,622 INFO L478 AbstractCegarLoop]: Abstraction has 279 states and 358 transitions. [2022-04-06 20:37:25,623 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:25,623 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 358 transitions. [2022-04-06 20:37:25,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:37:25,623 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:25,623 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:25,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:25,836 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-04-06 20:37:25,836 INFO L403 AbstractCegarLoop]: === Iteration 179 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:25,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:25,836 INFO L85 PathProgramCache]: Analyzing trace with hash -495928961, now seen corresponding path program 347 times [2022-04-06 20:37:25,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:25,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1730363166] [2022-04-06 20:37:25,837 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:25,837 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:25,837 INFO L85 PathProgramCache]: Analyzing trace with hash -495928961, now seen corresponding path program 348 times [2022-04-06 20:37:25,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:25,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300168638] [2022-04-06 20:37:25,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:25,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:26,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:37:26,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:26,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300168638] [2022-04-06 20:37:26,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300168638] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:26,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70710720] [2022-04-06 20:37:26,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:26,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:26,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:26,258 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:26,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-04-06 20:37:27,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:37:27,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:27,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:37:27,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:37:27,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:37:28,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70710720] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:28,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:28,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 20:37:28,220 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:28,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1730363166] [2022-04-06 20:37:28,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1730363166] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:28,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:28,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:37:28,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946290025] [2022-04-06 20:37:28,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:28,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:37:28,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:28,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:37:28,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=3243, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:37:28,221 INFO L87 Difference]: Start difference. First operand 279 states and 358 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:29,300 INFO L93 Difference]: Finished difference Result 318 states and 397 transitions. [2022-04-06 20:37:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:37:29,300 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 20:37:29,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:29,301 INFO L225 Difference]: With dead ends: 318 [2022-04-06 20:37:29,301 INFO L226 Difference]: Without dead ends: 297 [2022-04-06 20:37:29,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1729, Invalid=8777, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:37:29,309 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:29,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 165 Invalid, 2069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1983 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:37:29,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-04-06 20:37:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 280. [2022-04-06 20:37:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.290909090909091) internal successors, (355), 275 states have internal predecessors, (355), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 359 transitions. [2022-04-06 20:37:29,430 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 359 transitions. Word has length 56 [2022-04-06 20:37:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:29,430 INFO L478 AbstractCegarLoop]: Abstraction has 280 states and 359 transitions. [2022-04-06 20:37:29,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 359 transitions. [2022-04-06 20:37:29,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:37:29,430 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:29,430 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:29,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-04-06 20:37:29,638 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-04-06 20:37:29,638 INFO L403 AbstractCegarLoop]: === Iteration 180 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:29,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:29,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1804011149, now seen corresponding path program 349 times [2022-04-06 20:37:29,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:29,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2126350199] [2022-04-06 20:37:29,639 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:29,639 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:29,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1804011149, now seen corresponding path program 350 times [2022-04-06 20:37:29,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:29,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114782032] [2022-04-06 20:37:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:29,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:29,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:37:29,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:29,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114782032] [2022-04-06 20:37:29,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114782032] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:29,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982135741] [2022-04-06 20:37:29,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:29,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:29,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:29,924 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:29,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-04-06 20:37:29,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:29,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:29,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:37:29,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:37:30,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:37:30,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982135741] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:30,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:30,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:37:30,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:30,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2126350199] [2022-04-06 20:37:30,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2126350199] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:30,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:30,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:37:30,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577969116] [2022-04-06 20:37:30,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:30,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:37:30,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:30,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:37:30,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=3012, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:37:30,758 INFO L87 Difference]: Start difference. First operand 280 states and 359 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:31,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:31,913 INFO L93 Difference]: Finished difference Result 321 states and 400 transitions. [2022-04-06 20:37:31,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:37:31,913 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 20:37:31,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:31,913 INFO L225 Difference]: With dead ends: 321 [2022-04-06 20:37:31,913 INFO L226 Difference]: Without dead ends: 299 [2022-04-06 20:37:31,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1921, Invalid=9421, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:37:31,914 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 2158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:31,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 152 Invalid, 2158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:37:31,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-04-06 20:37:32,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 281. [2022-04-06 20:37:32,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.289855072463768) internal successors, (356), 276 states have internal predecessors, (356), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:32,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 360 transitions. [2022-04-06 20:37:32,040 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 360 transitions. Word has length 56 [2022-04-06 20:37:32,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:32,040 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 360 transitions. [2022-04-06 20:37:32,040 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:32,041 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 360 transitions. [2022-04-06 20:37:32,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:37:32,041 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:32,041 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:32,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-04-06 20:37:32,242 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:32,242 INFO L403 AbstractCegarLoop]: === Iteration 181 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:32,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:32,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1768763263, now seen corresponding path program 351 times [2022-04-06 20:37:32,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:32,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [323536720] [2022-04-06 20:37:32,243 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:32,243 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:32,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1768763263, now seen corresponding path program 352 times [2022-04-06 20:37:32,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:32,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981457464] [2022-04-06 20:37:32,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:32,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:32,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:37:32,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:32,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981457464] [2022-04-06 20:37:32,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981457464] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:32,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691856950] [2022-04-06 20:37:32,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:32,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:32,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:32,580 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:32,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-04-06 20:37:32,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:32,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:32,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:37:32,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:37:32,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:37:33,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691856950] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:33,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:33,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:37:33,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:33,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [323536720] [2022-04-06 20:37:33,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [323536720] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:33,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:33,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:37:33,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722141337] [2022-04-06 20:37:33,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:33,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:37:33,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:33,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:37:33,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=2779, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:37:33,546 INFO L87 Difference]: Start difference. First operand 281 states and 360 transitions. Second operand has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:35,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:35,015 INFO L93 Difference]: Finished difference Result 324 states and 403 transitions. [2022-04-06 20:37:35,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:37:35,016 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 20:37:35,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:35,016 INFO L225 Difference]: With dead ends: 324 [2022-04-06 20:37:35,016 INFO L226 Difference]: Without dead ends: 301 [2022-04-06 20:37:35,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1956, Invalid=9174, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:37:35,017 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:35,017 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 124 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1813 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:37:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-04-06 20:37:35,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 282. [2022-04-06 20:37:35,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 277 states have (on average 1.288808664259928) internal successors, (357), 277 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 361 transitions. [2022-04-06 20:37:35,144 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 361 transitions. Word has length 56 [2022-04-06 20:37:35,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:35,145 INFO L478 AbstractCegarLoop]: Abstraction has 282 states and 361 transitions. [2022-04-06 20:37:35,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 361 transitions. [2022-04-06 20:37:35,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:37:35,145 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:35,145 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:35,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-04-06 20:37:35,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:35,360 INFO L403 AbstractCegarLoop]: === Iteration 182 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:35,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:35,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1145948301, now seen corresponding path program 353 times [2022-04-06 20:37:35,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:35,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1201975284] [2022-04-06 20:37:35,361 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:35,361 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:35,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1145948301, now seen corresponding path program 354 times [2022-04-06 20:37:35,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:35,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120887867] [2022-04-06 20:37:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:35,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:35,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:37:35,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:35,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120887867] [2022-04-06 20:37:35,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120887867] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:35,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814149295] [2022-04-06 20:37:35,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:35,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:35,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:35,740 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:35,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-04-06 20:37:37,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 20:37:37,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:37,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 20:37:37,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:37:38,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:37:38,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814149295] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:38,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:38,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 20:37:38,892 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:38,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1201975284] [2022-04-06 20:37:38,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1201975284] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:38,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:38,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:37:38,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568420148] [2022-04-06 20:37:38,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:38,892 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:37:38,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:38,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:37:38,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=2554, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:37:38,893 INFO L87 Difference]: Start difference. First operand 282 states and 361 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:39,952 INFO L93 Difference]: Finished difference Result 327 states and 406 transitions. [2022-04-06 20:37:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:37:39,952 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 20:37:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:39,952 INFO L225 Difference]: With dead ends: 327 [2022-04-06 20:37:39,952 INFO L226 Difference]: Without dead ends: 303 [2022-04-06 20:37:39,953 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1796, Invalid=8104, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:37:39,953 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:39,953 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 146 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1970 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:37:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-04-06 20:37:40,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 283. [2022-04-06 20:37:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.2877697841726619) internal successors, (358), 278 states have internal predecessors, (358), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 362 transitions. [2022-04-06 20:37:40,082 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 362 transitions. Word has length 56 [2022-04-06 20:37:40,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:40,082 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 362 transitions. [2022-04-06 20:37:40,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:40,083 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 362 transitions. [2022-04-06 20:37:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:37:40,083 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:40,083 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:40,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:40,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:40,288 INFO L403 AbstractCegarLoop]: === Iteration 183 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:40,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:40,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1797573249, now seen corresponding path program 355 times [2022-04-06 20:37:40,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:40,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2033856052] [2022-04-06 20:37:40,289 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:40,289 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:40,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1797573249, now seen corresponding path program 356 times [2022-04-06 20:37:40,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:40,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915872141] [2022-04-06 20:37:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:40,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:40,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:37:40,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:40,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915872141] [2022-04-06 20:37:40,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915872141] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:40,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491343038] [2022-04-06 20:37:40,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:40,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:40,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:40,552 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:40,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-04-06 20:37:40,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:40,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:40,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 20:37:40,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:37:40,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:37:41,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491343038] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:41,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:41,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 20:37:41,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:41,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2033856052] [2022-04-06 20:37:41,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2033856052] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:41,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:41,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:37:41,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722328514] [2022-04-06 20:37:41,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:41,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:37:41,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:41,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:37:41,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=2327, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:37:41,346 INFO L87 Difference]: Start difference. First operand 283 states and 362 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:42,468 INFO L93 Difference]: Finished difference Result 330 states and 409 transitions. [2022-04-06 20:37:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:37:42,469 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 20:37:42,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:42,469 INFO L225 Difference]: With dead ends: 330 [2022-04-06 20:37:42,469 INFO L226 Difference]: Without dead ends: 305 [2022-04-06 20:37:42,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1495, Invalid=6337, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:37:42,473 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 51 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:42,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 149 Invalid, 1957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1878 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:37:42,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-04-06 20:37:42,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 284. [2022-04-06 20:37:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.2867383512544803) internal successors, (359), 279 states have internal predecessors, (359), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 363 transitions. [2022-04-06 20:37:42,603 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 363 transitions. Word has length 56 [2022-04-06 20:37:42,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:42,603 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 363 transitions. [2022-04-06 20:37:42,603 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:42,604 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 363 transitions. [2022-04-06 20:37:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:37:42,604 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:42,604 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:42,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:42,820 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:42,820 INFO L403 AbstractCegarLoop]: === Iteration 184 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:42,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:42,820 INFO L85 PathProgramCache]: Analyzing trace with hash -107808115, now seen corresponding path program 357 times [2022-04-06 20:37:42,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:42,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2051960953] [2022-04-06 20:37:42,821 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:42,822 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:42,822 INFO L85 PathProgramCache]: Analyzing trace with hash -107808115, now seen corresponding path program 358 times [2022-04-06 20:37:42,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:42,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724727854] [2022-04-06 20:37:42,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:42,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:43,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:37:43,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:43,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724727854] [2022-04-06 20:37:43,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724727854] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:43,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688933856] [2022-04-06 20:37:43,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:43,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:43,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:43,117 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:43,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-04-06 20:37:43,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:43,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:43,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:37:43,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:37:43,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:37:43,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688933856] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:43,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:43,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:37:43,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:43,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2051960953] [2022-04-06 20:37:43,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2051960953] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:43,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:43,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:37:43,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759384665] [2022-04-06 20:37:43,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:43,833 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:37:43,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:43,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:37:43,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=2098, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:37:43,833 INFO L87 Difference]: Start difference. First operand 284 states and 363 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:44,783 INFO L93 Difference]: Finished difference Result 333 states and 412 transitions. [2022-04-06 20:37:44,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:37:44,783 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 20:37:44,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:44,784 INFO L225 Difference]: With dead ends: 333 [2022-04-06 20:37:44,784 INFO L226 Difference]: Without dead ends: 307 [2022-04-06 20:37:44,784 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1262, Invalid=4900, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:37:44,784 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 60 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1706 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:44,784 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 142 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1706 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:37:44,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-04-06 20:37:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 285. [2022-04-06 20:37:44,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.2857142857142858) internal successors, (360), 280 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:44,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 364 transitions. [2022-04-06 20:37:44,917 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 364 transitions. Word has length 56 [2022-04-06 20:37:44,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:44,917 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 364 transitions. [2022-04-06 20:37:44,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:44,917 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 364 transitions. [2022-04-06 20:37:44,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:37:44,917 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:44,917 INFO L499 BasicCegarLoop]: trace histogram [39, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:44,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:45,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-04-06 20:37:45,133 INFO L403 AbstractCegarLoop]: === Iteration 185 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:45,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1370005906, now seen corresponding path program 359 times [2022-04-06 20:37:45,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:45,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [901111714] [2022-04-06 20:37:45,134 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:45,134 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:45,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1370005906, now seen corresponding path program 360 times [2022-04-06 20:37:45,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:45,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389592209] [2022-04-06 20:37:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:45,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:45,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 781 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:37:45,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:45,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389592209] [2022-04-06 20:37:45,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389592209] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:45,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743075858] [2022-04-06 20:37:45,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:45,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:45,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:45,678 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:45,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-04-06 20:37:45,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:37:45,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:45,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:37:45,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-04-06 20:37:45,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-04-06 20:37:45,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743075858] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:45,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:45,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 6, 6] total 51 [2022-04-06 20:37:45,933 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:45,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [901111714] [2022-04-06 20:37:45,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [901111714] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:45,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:45,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:37:45,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306786652] [2022-04-06 20:37:45,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:45,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:37:45,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:45,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:37:45,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2438, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:37:45,934 INFO L87 Difference]: Start difference. First operand 285 states and 364 transitions. Second operand has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:48,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:48,656 INFO L93 Difference]: Finished difference Result 469 states and 694 transitions. [2022-04-06 20:37:48,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:37:48,656 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 20:37:48,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:48,657 INFO L225 Difference]: With dead ends: 469 [2022-04-06 20:37:48,657 INFO L226 Difference]: Without dead ends: 461 [2022-04-06 20:37:48,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=303, Invalid=8439, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:37:48,658 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 219 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 7675 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 7842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 7675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:48,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 293 Invalid, 7842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 7675 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:37:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-04-06 20:37:48,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 291. [2022-04-06 20:37:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.2867132867132867) internal successors, (368), 286 states have internal predecessors, (368), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 372 transitions. [2022-04-06 20:37:48,795 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 372 transitions. Word has length 56 [2022-04-06 20:37:48,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:48,796 INFO L478 AbstractCegarLoop]: Abstraction has 291 states and 372 transitions. [2022-04-06 20:37:48,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:48,796 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 372 transitions. [2022-04-06 20:37:48,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:37:48,796 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:48,796 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:48,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-04-06 20:37:49,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:49,007 INFO L403 AbstractCegarLoop]: === Iteration 186 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:49,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:49,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1556103087, now seen corresponding path program 361 times [2022-04-06 20:37:49,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:49,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [252588455] [2022-04-06 20:37:49,008 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:49,008 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:49,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1556103087, now seen corresponding path program 362 times [2022-04-06 20:37:49,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:49,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272914931] [2022-04-06 20:37:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:49,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:49,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:37:49,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:49,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272914931] [2022-04-06 20:37:49,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272914931] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:49,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489987295] [2022-04-06 20:37:49,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:49,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:49,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:49,302 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:49,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-04-06 20:37:49,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:49,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:49,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 20:37:49,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:37:49,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:37:50,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489987295] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:50,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:50,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 78 [2022-04-06 20:37:50,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:50,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [252588455] [2022-04-06 20:37:50,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [252588455] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:50,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:50,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:37:50,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659746404] [2022-04-06 20:37:50,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:50,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:37:50,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:50,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:37:50,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=858, Invalid=5148, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:37:50,891 INFO L87 Difference]: Start difference. First operand 291 states and 372 transitions. Second operand has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:51,793 INFO L93 Difference]: Finished difference Result 311 states and 391 transitions. [2022-04-06 20:37:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:37:51,793 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:37:51,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:51,793 INFO L225 Difference]: With dead ends: 311 [2022-04-06 20:37:51,793 INFO L226 Difference]: Without dead ends: 274 [2022-04-06 20:37:51,794 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1668, Invalid=9888, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 20:37:51,794 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:51,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 166 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-04-06 20:37:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2022-04-06 20:37:51,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 269 states have (on average 1.2973977695167287) internal successors, (349), 269 states have internal predecessors, (349), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:51,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 353 transitions. [2022-04-06 20:37:51,910 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 353 transitions. Word has length 57 [2022-04-06 20:37:51,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:51,910 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 353 transitions. [2022-04-06 20:37:51,910 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:51,910 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 353 transitions. [2022-04-06 20:37:51,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:37:51,911 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:51,911 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:51,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:52,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:52,112 INFO L403 AbstractCegarLoop]: === Iteration 187 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:52,113 INFO L85 PathProgramCache]: Analyzing trace with hash -688140673, now seen corresponding path program 363 times [2022-04-06 20:37:52,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:52,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [846568164] [2022-04-06 20:37:52,113 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:52,113 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:52,113 INFO L85 PathProgramCache]: Analyzing trace with hash -688140673, now seen corresponding path program 364 times [2022-04-06 20:37:52,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:52,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689431385] [2022-04-06 20:37:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:52,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:52,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:37:52,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:52,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689431385] [2022-04-06 20:37:52,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689431385] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:52,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222599492] [2022-04-06 20:37:52,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:52,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:52,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:52,431 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:52,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-04-06 20:37:52,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:52,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:52,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 20:37:52,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:37:52,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 28 proven. 182 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 20:37:53,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222599492] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:53,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:53,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 30] total 75 [2022-04-06 20:37:53,739 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:53,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [846568164] [2022-04-06 20:37:53,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [846568164] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:53,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:53,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:37:53,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986588] [2022-04-06 20:37:53,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:53,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:37:53,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:53,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:37:53,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=4950, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:37:53,740 INFO L87 Difference]: Start difference. First operand 274 states and 353 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:54,738 INFO L93 Difference]: Finished difference Result 313 states and 392 transitions. [2022-04-06 20:37:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:37:54,738 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:37:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:54,738 INFO L225 Difference]: With dead ends: 313 [2022-04-06 20:37:54,738 INFO L226 Difference]: Without dead ends: 292 [2022-04-06 20:37:54,739 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=988, Invalid=9932, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:37:54,739 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:54,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 133 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:54,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-04-06 20:37:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 275. [2022-04-06 20:37:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.2962962962962963) internal successors, (350), 270 states have internal predecessors, (350), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 354 transitions. [2022-04-06 20:37:54,865 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 354 transitions. Word has length 57 [2022-04-06 20:37:54,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:54,865 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 354 transitions. [2022-04-06 20:37:54,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 354 transitions. [2022-04-06 20:37:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:37:54,865 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:54,865 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:54,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:55,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:55,076 INFO L403 AbstractCegarLoop]: === Iteration 188 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:55,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:55,076 INFO L85 PathProgramCache]: Analyzing trace with hash -956244497, now seen corresponding path program 365 times [2022-04-06 20:37:55,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:55,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [183502603] [2022-04-06 20:37:55,076 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:55,077 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:55,077 INFO L85 PathProgramCache]: Analyzing trace with hash -956244497, now seen corresponding path program 366 times [2022-04-06 20:37:55,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:55,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126360668] [2022-04-06 20:37:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:55,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:55,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:37:55,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:55,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126360668] [2022-04-06 20:37:55,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126360668] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:55,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87605257] [2022-04-06 20:37:55,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:55,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:55,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:55,512 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:55,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-04-06 20:37:56,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:37:56,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:56,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:37:56,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:37:56,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:37:57,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87605257] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:57,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:57,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 20:37:57,640 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:57,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [183502603] [2022-04-06 20:37:57,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [183502603] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:57,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:57,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:37:57,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320594337] [2022-04-06 20:37:57,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:57,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:37:57,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:57,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:37:57,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=3230, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:37:57,641 INFO L87 Difference]: Start difference. First operand 275 states and 354 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:58,675 INFO L93 Difference]: Finished difference Result 316 states and 395 transitions. [2022-04-06 20:37:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:37:58,675 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:37:58,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:58,677 INFO L225 Difference]: With dead ends: 316 [2022-04-06 20:37:58,677 INFO L226 Difference]: Without dead ends: 294 [2022-04-06 20:37:58,678 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1718, Invalid=8584, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:37:58,678 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:58,678 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 120 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1564 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:37:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-04-06 20:37:58,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 276. [2022-04-06 20:37:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 271 states have (on average 1.2952029520295203) internal successors, (351), 271 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 355 transitions. [2022-04-06 20:37:58,805 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 355 transitions. Word has length 57 [2022-04-06 20:37:58,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:58,805 INFO L478 AbstractCegarLoop]: Abstraction has 276 states and 355 transitions. [2022-04-06 20:37:58,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:58,806 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 355 transitions. [2022-04-06 20:37:58,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:37:58,806 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:58,806 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:58,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-04-06 20:37:59,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:59,010 INFO L403 AbstractCegarLoop]: === Iteration 189 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:59,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:59,011 INFO L85 PathProgramCache]: Analyzing trace with hash -104501185, now seen corresponding path program 367 times [2022-04-06 20:37:59,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:59,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [961296956] [2022-04-06 20:37:59,011 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:59,011 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:59,011 INFO L85 PathProgramCache]: Analyzing trace with hash -104501185, now seen corresponding path program 368 times [2022-04-06 20:37:59,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:59,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198308596] [2022-04-06 20:37:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:59,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:59,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:37:59,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:59,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198308596] [2022-04-06 20:37:59,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198308596] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:59,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238902054] [2022-04-06 20:37:59,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:59,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:59,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:59,296 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:59,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-04-06 20:37:59,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:59,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:59,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:37:59,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:37:59,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:00,143 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:38:00,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238902054] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:00,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:00,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:38:00,143 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:00,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [961296956] [2022-04-06 20:38:00,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [961296956] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:00,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:00,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:38:00,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352940460] [2022-04-06 20:38:00,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:00,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:38:00,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:00,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:38:00,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=2993, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:38:00,144 INFO L87 Difference]: Start difference. First operand 276 states and 355 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:01,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:01,496 INFO L93 Difference]: Finished difference Result 319 states and 398 transitions. [2022-04-06 20:38:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:38:01,496 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:38:01,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:01,496 INFO L225 Difference]: With dead ends: 319 [2022-04-06 20:38:01,496 INFO L226 Difference]: Without dead ends: 296 [2022-04-06 20:38:01,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1890, Invalid=9030, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:38:01,497 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:01,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 117 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:01,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-04-06 20:38:01,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 277. [2022-04-06 20:38:01,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.2941176470588236) internal successors, (352), 272 states have internal predecessors, (352), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:01,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 356 transitions. [2022-04-06 20:38:01,622 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 356 transitions. Word has length 57 [2022-04-06 20:38:01,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:01,622 INFO L478 AbstractCegarLoop]: Abstraction has 277 states and 356 transitions. [2022-04-06 20:38:01,623 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:01,623 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 356 transitions. [2022-04-06 20:38:01,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:38:01,623 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:01,623 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:01,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-04-06 20:38:01,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:01,831 INFO L403 AbstractCegarLoop]: === Iteration 190 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:01,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:01,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2084176849, now seen corresponding path program 369 times [2022-04-06 20:38:01,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:01,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1943785338] [2022-04-06 20:38:01,832 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:01,832 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:01,832 INFO L85 PathProgramCache]: Analyzing trace with hash -2084176849, now seen corresponding path program 370 times [2022-04-06 20:38:01,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:01,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244751411] [2022-04-06 20:38:01,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:01,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:02,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:38:02,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:02,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244751411] [2022-04-06 20:38:02,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244751411] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:02,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99773617] [2022-04-06 20:38:02,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:02,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:02,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:02,216 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:02,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-04-06 20:38:02,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:02,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:02,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:38:02,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:38:02,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:38:03,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99773617] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:03,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:03,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:38:03,213 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:03,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1943785338] [2022-04-06 20:38:03,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1943785338] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:03,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:03,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:38:03,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028703233] [2022-04-06 20:38:03,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:03,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:38:03,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:03,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:38:03,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=2760, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:38:03,214 INFO L87 Difference]: Start difference. First operand 277 states and 356 transitions. Second operand has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:04,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:04,374 INFO L93 Difference]: Finished difference Result 322 states and 401 transitions. [2022-04-06 20:38:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:38:04,375 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:38:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:04,375 INFO L225 Difference]: With dead ends: 322 [2022-04-06 20:38:04,375 INFO L226 Difference]: Without dead ends: 298 [2022-04-06 20:38:04,376 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1877, Invalid=8629, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:38:04,376 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:04,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 154 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:04,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-04-06 20:38:04,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 278. [2022-04-06 20:38:04,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 273 states have (on average 1.293040293040293) internal successors, (353), 273 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 357 transitions. [2022-04-06 20:38:04,504 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 357 transitions. Word has length 57 [2022-04-06 20:38:04,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:04,504 INFO L478 AbstractCegarLoop]: Abstraction has 278 states and 357 transitions. [2022-04-06 20:38:04,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:04,504 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 357 transitions. [2022-04-06 20:38:04,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:38:04,504 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:04,504 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:04,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:04,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-04-06 20:38:04,720 INFO L403 AbstractCegarLoop]: === Iteration 191 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:04,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1440256511, now seen corresponding path program 371 times [2022-04-06 20:38:04,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:04,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [488335477] [2022-04-06 20:38:04,721 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:04,721 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:04,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1440256511, now seen corresponding path program 372 times [2022-04-06 20:38:04,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:04,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223979478] [2022-04-06 20:38:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:04,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:04,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:38:04,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:04,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223979478] [2022-04-06 20:38:04,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223979478] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:04,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42722879] [2022-04-06 20:38:04,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:04,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:04,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:04,971 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:04,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-04-06 20:38:07,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 20:38:07,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:07,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:38:07,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:38:08,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:38:08,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42722879] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:08,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:08,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 20:38:08,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:08,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [488335477] [2022-04-06 20:38:08,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [488335477] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:08,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:08,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:38:08,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911181192] [2022-04-06 20:38:08,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:08,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:38:08,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:08,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:38:08,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=2529, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:38:08,951 INFO L87 Difference]: Start difference. First operand 278 states and 357 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:10,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:10,121 INFO L93 Difference]: Finished difference Result 325 states and 404 transitions. [2022-04-06 20:38:10,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:38:10,121 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:38:10,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:10,122 INFO L225 Difference]: With dead ends: 325 [2022-04-06 20:38:10,126 INFO L226 Difference]: Without dead ends: 300 [2022-04-06 20:38:10,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1695, Invalid=7425, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 20:38:10,126 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1957 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:10,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 151 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1957 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:10,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-04-06 20:38:10,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 279. [2022-04-06 20:38:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.2919708029197081) internal successors, (354), 274 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 358 transitions. [2022-04-06 20:38:10,250 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 358 transitions. Word has length 57 [2022-04-06 20:38:10,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:10,250 INFO L478 AbstractCegarLoop]: Abstraction has 279 states and 358 transitions. [2022-04-06 20:38:10,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 358 transitions. [2022-04-06 20:38:10,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:38:10,250 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:10,250 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:10,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:10,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-04-06 20:38:10,455 INFO L403 AbstractCegarLoop]: === Iteration 192 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:10,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1787585937, now seen corresponding path program 373 times [2022-04-06 20:38:10,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:10,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [684492897] [2022-04-06 20:38:10,456 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:10,456 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:10,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1787585937, now seen corresponding path program 374 times [2022-04-06 20:38:10,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:10,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016620797] [2022-04-06 20:38:10,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:10,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:10,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:38:10,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:10,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016620797] [2022-04-06 20:38:10,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016620797] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:10,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691466134] [2022-04-06 20:38:10,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:10,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:10,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:10,804 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:10,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-04-06 20:38:10,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:10,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:10,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 20:38:10,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:38:10,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:38:11,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691466134] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:11,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:11,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 20:38:11,621 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:11,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [684492897] [2022-04-06 20:38:11,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [684492897] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:11,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:11,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:38:11,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436409256] [2022-04-06 20:38:11,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:11,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:38:11,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:11,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:38:11,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=2296, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:38:11,622 INFO L87 Difference]: Start difference. First operand 279 states and 358 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:12,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:12,659 INFO L93 Difference]: Finished difference Result 328 states and 407 transitions. [2022-04-06 20:38:12,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:38:12,659 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:38:12,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:12,660 INFO L225 Difference]: With dead ends: 328 [2022-04-06 20:38:12,660 INFO L226 Difference]: Without dead ends: 302 [2022-04-06 20:38:12,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1409, Invalid=5731, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:38:12,660 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 51 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1924 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:12,660 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 155 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1924 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-04-06 20:38:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 280. [2022-04-06 20:38:12,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.290909090909091) internal successors, (355), 275 states have internal predecessors, (355), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 359 transitions. [2022-04-06 20:38:12,787 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 359 transitions. Word has length 57 [2022-04-06 20:38:12,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:12,789 INFO L478 AbstractCegarLoop]: Abstraction has 280 states and 359 transitions. [2022-04-06 20:38:12,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:12,789 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 359 transitions. [2022-04-06 20:38:12,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:38:12,789 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:12,789 INFO L499 BasicCegarLoop]: trace histogram [40, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:12,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-04-06 20:38:13,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:13,005 INFO L403 AbstractCegarLoop]: === Iteration 193 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:13,005 INFO L85 PathProgramCache]: Analyzing trace with hash -64061297, now seen corresponding path program 375 times [2022-04-06 20:38:13,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:13,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1963226350] [2022-04-06 20:38:13,006 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:13,006 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:13,006 INFO L85 PathProgramCache]: Analyzing trace with hash -64061297, now seen corresponding path program 376 times [2022-04-06 20:38:13,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:13,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931690225] [2022-04-06 20:38:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:13,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:13,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 0 proven. 821 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:13,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:13,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931690225] [2022-04-06 20:38:13,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931690225] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:13,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516354405] [2022-04-06 20:38:13,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:13,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:13,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:13,666 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:13,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-04-06 20:38:13,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:13,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:13,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 20:38:13,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 0 proven. 821 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:13,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 0 proven. 821 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:16,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516354405] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:16,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:16,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-04-06 20:38:16,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:16,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1963226350] [2022-04-06 20:38:16,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1963226350] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:16,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:16,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:38:16,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635111966] [2022-04-06 20:38:16,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:16,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:38:16,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:16,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:38:16,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1864, Invalid=6146, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:38:16,124 INFO L87 Difference]: Start difference. First operand 280 states and 359 transitions. Second operand has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:18,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:18,808 INFO L93 Difference]: Finished difference Result 465 states and 691 transitions. [2022-04-06 20:38:18,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:38:18,808 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:38:18,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:18,809 INFO L225 Difference]: With dead ends: 465 [2022-04-06 20:38:18,809 INFO L226 Difference]: Without dead ends: 457 [2022-04-06 20:38:18,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3856, Invalid=13966, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 20:38:18,810 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 219 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7948 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 8119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 7948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:18,810 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 298 Invalid, 8119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 7948 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:38:18,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-04-06 20:38:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 286. [2022-04-06 20:38:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 281 states have (on average 1.291814946619217) internal successors, (363), 281 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 367 transitions. [2022-04-06 20:38:18,943 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 367 transitions. Word has length 57 [2022-04-06 20:38:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:18,943 INFO L478 AbstractCegarLoop]: Abstraction has 286 states and 367 transitions. [2022-04-06 20:38:18,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 367 transitions. [2022-04-06 20:38:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:38:18,944 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:18,944 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:18,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:19,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:19,160 INFO L403 AbstractCegarLoop]: === Iteration 194 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:19,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:19,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1943230847, now seen corresponding path program 377 times [2022-04-06 20:38:19,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:19,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1896833210] [2022-04-06 20:38:19,162 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:19,162 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:19,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1943230847, now seen corresponding path program 378 times [2022-04-06 20:38:19,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:19,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187927854] [2022-04-06 20:38:19,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:19,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:19,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:38:19,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:19,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187927854] [2022-04-06 20:38:19,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187927854] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:19,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761786733] [2022-04-06 20:38:19,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:19,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:19,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:19,630 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:19,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-04-06 20:38:20,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:38:20,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:20,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 92 conjunts are in the unsatisfiable core [2022-04-06 20:38:20,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:38:21,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:38:22,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761786733] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:22,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:22,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 32] total 79 [2022-04-06 20:38:22,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:22,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1896833210] [2022-04-06 20:38:22,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1896833210] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:22,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:22,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:38:22,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650728894] [2022-04-06 20:38:22,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:22,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:38:22,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:22,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:38:22,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=5495, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:38:22,337 INFO L87 Difference]: Start difference. First operand 286 states and 367 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:23,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:23,523 INFO L93 Difference]: Finished difference Result 325 states and 406 transitions. [2022-04-06 20:38:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:38:23,524 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-04-06 20:38:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:23,524 INFO L225 Difference]: With dead ends: 325 [2022-04-06 20:38:23,524 INFO L226 Difference]: Without dead ends: 304 [2022-04-06 20:38:23,524 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1091, Invalid=10899, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 20:38:23,525 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:23,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 118 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:38:23,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-04-06 20:38:23,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 287. [2022-04-06 20:38:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.2907801418439717) internal successors, (364), 282 states have internal predecessors, (364), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:23,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 368 transitions. [2022-04-06 20:38:23,653 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 368 transitions. Word has length 58 [2022-04-06 20:38:23,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:23,653 INFO L478 AbstractCegarLoop]: Abstraction has 287 states and 368 transitions. [2022-04-06 20:38:23,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:23,653 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 368 transitions. [2022-04-06 20:38:23,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:38:23,654 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:23,654 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:23,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-04-06 20:38:23,858 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:23,858 INFO L403 AbstractCegarLoop]: === Iteration 195 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:23,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:23,858 INFO L85 PathProgramCache]: Analyzing trace with hash -624823603, now seen corresponding path program 379 times [2022-04-06 20:38:23,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:23,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [564892233] [2022-04-06 20:38:23,859 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:23,859 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:23,859 INFO L85 PathProgramCache]: Analyzing trace with hash -624823603, now seen corresponding path program 380 times [2022-04-06 20:38:23,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:23,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433406610] [2022-04-06 20:38:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:23,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:24,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:38:24,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:24,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433406610] [2022-04-06 20:38:24,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433406610] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:24,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629645930] [2022-04-06 20:38:24,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:24,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:24,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:24,329 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:24,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-04-06 20:38:24,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:24,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:24,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:38:24,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:38:24,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:38:25,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629645930] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:25,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:25,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:38:25,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:25,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [564892233] [2022-04-06 20:38:25,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [564892233] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:25,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:25,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:38:25,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783911794] [2022-04-06 20:38:25,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:25,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:38:25,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:25,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:38:25,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=3454, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:38:25,281 INFO L87 Difference]: Start difference. First operand 287 states and 368 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:26,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:26,440 INFO L93 Difference]: Finished difference Result 328 states and 409 transitions. [2022-04-06 20:38:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:38:26,441 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-04-06 20:38:26,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:26,441 INFO L225 Difference]: With dead ends: 328 [2022-04-06 20:38:26,441 INFO L226 Difference]: Without dead ends: 306 [2022-04-06 20:38:26,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1834, Invalid=9296, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:38:26,442 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1972 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:26,442 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 155 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1972 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:26,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-04-06 20:38:26,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 288. [2022-04-06 20:38:26,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 283 states have (on average 1.2897526501766785) internal successors, (365), 283 states have internal predecessors, (365), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 369 transitions. [2022-04-06 20:38:26,575 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 369 transitions. Word has length 58 [2022-04-06 20:38:26,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:26,575 INFO L478 AbstractCegarLoop]: Abstraction has 288 states and 369 transitions. [2022-04-06 20:38:26,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:26,575 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 369 transitions. [2022-04-06 20:38:26,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:38:26,575 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:26,575 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:26,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-04-06 20:38:26,784 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:26,784 INFO L403 AbstractCegarLoop]: === Iteration 196 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:26,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:26,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1953843071, now seen corresponding path program 381 times [2022-04-06 20:38:26,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:26,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1214997500] [2022-04-06 20:38:26,785 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:26,785 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:26,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1953843071, now seen corresponding path program 382 times [2022-04-06 20:38:26,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:26,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475396111] [2022-04-06 20:38:26,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:26,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:27,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:38:27,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:27,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475396111] [2022-04-06 20:38:27,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475396111] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:27,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188538863] [2022-04-06 20:38:27,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:27,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:27,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:27,166 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:27,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-04-06 20:38:27,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:27,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:27,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:38:27,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:38:27,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:38:28,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188538863] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:28,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:28,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 20:38:28,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:28,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1214997500] [2022-04-06 20:38:28,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1214997500] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:28,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:28,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:38:28,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385073743] [2022-04-06 20:38:28,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:28,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:38:28,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:28,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:38:28,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=3213, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:38:28,175 INFO L87 Difference]: Start difference. First operand 288 states and 369 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:29,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:29,527 INFO L93 Difference]: Finished difference Result 331 states and 412 transitions. [2022-04-06 20:38:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:38:29,527 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-04-06 20:38:29,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:29,527 INFO L225 Difference]: With dead ends: 331 [2022-04-06 20:38:29,527 INFO L226 Difference]: Without dead ends: 308 [2022-04-06 20:38:29,528 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2037, Invalid=9953, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 20:38:29,528 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 2192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:29,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 147 Invalid, 2192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:29,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-04-06 20:38:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 289. [2022-04-06 20:38:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.2887323943661972) internal successors, (366), 284 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 370 transitions. [2022-04-06 20:38:29,659 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 370 transitions. Word has length 58 [2022-04-06 20:38:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:29,659 INFO L478 AbstractCegarLoop]: Abstraction has 289 states and 370 transitions. [2022-04-06 20:38:29,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 370 transitions. [2022-04-06 20:38:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:38:29,660 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:29,660 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:29,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:29,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:29,864 INFO L403 AbstractCegarLoop]: === Iteration 197 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:29,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:29,864 INFO L85 PathProgramCache]: Analyzing trace with hash 861158605, now seen corresponding path program 383 times [2022-04-06 20:38:29,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:29,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [638500363] [2022-04-06 20:38:29,865 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:29,865 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:29,865 INFO L85 PathProgramCache]: Analyzing trace with hash 861158605, now seen corresponding path program 384 times [2022-04-06 20:38:29,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:29,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158878342] [2022-04-06 20:38:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:29,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:30,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:38:30,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:30,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158878342] [2022-04-06 20:38:30,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158878342] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:30,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442366693] [2022-04-06 20:38:30,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:30,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:30,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:30,196 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:30,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-04-06 20:38:32,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 20:38:32,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:32,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:38:32,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:38:32,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:38:33,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442366693] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:33,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:33,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:38:33,418 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:33,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [638500363] [2022-04-06 20:38:33,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [638500363] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:33,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:33,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:38:33,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797740203] [2022-04-06 20:38:33,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:33,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:38:33,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:33,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:38:33,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=568, Invalid=2972, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:38:33,419 INFO L87 Difference]: Start difference. First operand 289 states and 370 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:34,913 INFO L93 Difference]: Finished difference Result 334 states and 415 transitions. [2022-04-06 20:38:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:38:34,914 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-04-06 20:38:34,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:34,914 INFO L225 Difference]: With dead ends: 334 [2022-04-06 20:38:34,914 INFO L226 Difference]: Without dead ends: 310 [2022-04-06 20:38:34,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2068, Invalid=9704, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:38:34,915 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1883 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:34,915 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 124 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1883 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:34,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-04-06 20:38:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 290. [2022-04-06 20:38:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.287719298245614) internal successors, (367), 285 states have internal predecessors, (367), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:35,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 371 transitions. [2022-04-06 20:38:35,048 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 371 transitions. Word has length 58 [2022-04-06 20:38:35,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:35,048 INFO L478 AbstractCegarLoop]: Abstraction has 290 states and 371 transitions. [2022-04-06 20:38:35,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:35,048 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 371 transitions. [2022-04-06 20:38:35,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:38:35,048 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:35,048 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:35,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:35,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:35,253 INFO L403 AbstractCegarLoop]: === Iteration 198 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:35,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1266236033, now seen corresponding path program 385 times [2022-04-06 20:38:35,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:35,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [443635349] [2022-04-06 20:38:35,254 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:35,254 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1266236033, now seen corresponding path program 386 times [2022-04-06 20:38:35,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:35,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783207235] [2022-04-06 20:38:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:35,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:35,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:38:35,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:35,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783207235] [2022-04-06 20:38:35,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783207235] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:35,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616625418] [2022-04-06 20:38:35,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:35,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:35,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:35,648 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:35,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-04-06 20:38:35,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:35,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:35,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:38:35,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:38:35,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:38:36,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616625418] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:36,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:36,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:38:36,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:36,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [443635349] [2022-04-06 20:38:36,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [443635349] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:36,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:36,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:38:36,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078578667] [2022-04-06 20:38:36,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:36,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:38:36,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:36,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:38:36,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=2737, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:38:36,817 INFO L87 Difference]: Start difference. First operand 290 states and 371 transitions. Second operand has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:38,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:38,400 INFO L93 Difference]: Finished difference Result 337 states and 418 transitions. [2022-04-06 20:38:38,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:38:38,400 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-04-06 20:38:38,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:38,400 INFO L225 Difference]: With dead ends: 337 [2022-04-06 20:38:38,400 INFO L226 Difference]: Without dead ends: 312 [2022-04-06 20:38:38,401 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1907, Invalid=8599, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:38:38,401 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:38,401 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 161 Invalid, 2322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:38:38,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-04-06 20:38:38,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 291. [2022-04-06 20:38:38,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.2867132867132867) internal successors, (368), 286 states have internal predecessors, (368), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 372 transitions. [2022-04-06 20:38:38,535 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 372 transitions. Word has length 58 [2022-04-06 20:38:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:38,535 INFO L478 AbstractCegarLoop]: Abstraction has 291 states and 372 transitions. [2022-04-06 20:38:38,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 372 transitions. [2022-04-06 20:38:38,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:38:38,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:38,535 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:38,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:38,752 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:38,753 INFO L403 AbstractCegarLoop]: === Iteration 199 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:38,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:38,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1973876429, now seen corresponding path program 387 times [2022-04-06 20:38:38,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:38,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1560773775] [2022-04-06 20:38:38,754 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:38,754 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:38,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1973876429, now seen corresponding path program 388 times [2022-04-06 20:38:38,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:38,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253707348] [2022-04-06 20:38:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:38,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:39,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:38:39,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:39,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253707348] [2022-04-06 20:38:39,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253707348] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:39,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342881475] [2022-04-06 20:38:39,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:39,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:39,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:39,054 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:39,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-04-06 20:38:39,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:39,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:39,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:38:39,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:38:39,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:38:39,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342881475] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:39,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:39,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 20:38:39,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:39,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1560773775] [2022-04-06 20:38:39,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1560773775] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:39,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:39,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:38:39,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425727655] [2022-04-06 20:38:39,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:39,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:38:39,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:38:39,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=2500, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:38:39,807 INFO L87 Difference]: Start difference. First operand 291 states and 372 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:40,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:40,881 INFO L93 Difference]: Finished difference Result 340 states and 421 transitions. [2022-04-06 20:38:40,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:38:40,881 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-04-06 20:38:40,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:40,882 INFO L225 Difference]: With dead ends: 340 [2022-04-06 20:38:40,882 INFO L226 Difference]: Without dead ends: 314 [2022-04-06 20:38:40,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1600, Invalid=6772, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:38:40,882 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 51 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1941 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:40,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 149 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1941 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:40,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-04-06 20:38:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 292. [2022-04-06 20:38:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 287 states have (on average 1.2857142857142858) internal successors, (369), 287 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 373 transitions. [2022-04-06 20:38:41,023 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 373 transitions. Word has length 58 [2022-04-06 20:38:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:41,023 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 373 transitions. [2022-04-06 20:38:41,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:41,023 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 373 transitions. [2022-04-06 20:38:41,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:38:41,023 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:41,023 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:41,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:41,240 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:41,240 INFO L403 AbstractCegarLoop]: === Iteration 200 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:41,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:41,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1477979265, now seen corresponding path program 389 times [2022-04-06 20:38:41,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:41,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [640424609] [2022-04-06 20:38:41,241 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:41,241 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:41,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1477979265, now seen corresponding path program 390 times [2022-04-06 20:38:41,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:41,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783807853] [2022-04-06 20:38:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:41,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:41,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:38:41,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:41,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783807853] [2022-04-06 20:38:41,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783807853] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:41,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291519326] [2022-04-06 20:38:41,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:41,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:41,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:41,501 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:41,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-04-06 20:38:41,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:38:41,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:41,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:38:41,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-04-06 20:38:41,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 58 proven. 5 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-04-06 20:38:42,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291519326] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:42,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:42,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 8, 8] total 39 [2022-04-06 20:38:42,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:42,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [640424609] [2022-04-06 20:38:42,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [640424609] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:42,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:42,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:38:42,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861039969] [2022-04-06 20:38:42,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:42,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:38:42,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:42,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:38:42,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1365, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:38:42,139 INFO L87 Difference]: Start difference. First operand 292 states and 373 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:43,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:43,085 INFO L93 Difference]: Finished difference Result 343 states and 424 transitions. [2022-04-06 20:38:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:38:43,086 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-04-06 20:38:43,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:43,086 INFO L225 Difference]: With dead ends: 343 [2022-04-06 20:38:43,086 INFO L226 Difference]: Without dead ends: 316 [2022-04-06 20:38:43,086 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=4141, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:38:43,087 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 60 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1904 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:43,087 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 152 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1904 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:43,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-04-06 20:38:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 293. [2022-04-06 20:38:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.2847222222222223) internal successors, (370), 288 states have internal predecessors, (370), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 374 transitions. [2022-04-06 20:38:43,227 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 374 transitions. Word has length 58 [2022-04-06 20:38:43,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:43,227 INFO L478 AbstractCegarLoop]: Abstraction has 293 states and 374 transitions. [2022-04-06 20:38:43,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:43,227 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 374 transitions. [2022-04-06 20:38:43,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:38:43,227 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:43,227 INFO L499 BasicCegarLoop]: trace histogram [41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:43,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-04-06 20:38:43,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-04-06 20:38:43,431 INFO L403 AbstractCegarLoop]: === Iteration 201 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:43,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:43,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1765515918, now seen corresponding path program 391 times [2022-04-06 20:38:43,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:43,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [941511855] [2022-04-06 20:38:43,432 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:43,432 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:43,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1765515918, now seen corresponding path program 392 times [2022-04-06 20:38:43,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:43,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349655151] [2022-04-06 20:38:43,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:43,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:44,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 0 proven. 862 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:44,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:44,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349655151] [2022-04-06 20:38:44,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349655151] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:44,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945965780] [2022-04-06 20:38:44,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:44,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:44,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:44,279 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:44,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-04-06 20:38:44,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:44,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:44,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 20:38:44,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 0 proven. 862 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:44,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 0 proven. 862 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:46,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945965780] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:46,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:46,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-04-06 20:38:46,581 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:46,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [941511855] [2022-04-06 20:38:46,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [941511855] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:46,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:46,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:38:46,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401039319] [2022-04-06 20:38:46,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:46,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:38:46,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:46,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:38:46,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=6421, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:38:46,583 INFO L87 Difference]: Start difference. First operand 293 states and 374 transitions. Second operand has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:49,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:49,324 INFO L93 Difference]: Finished difference Result 479 states and 708 transitions. [2022-04-06 20:38:49,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:38:49,324 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-04-06 20:38:49,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:49,325 INFO L225 Difference]: With dead ends: 479 [2022-04-06 20:38:49,325 INFO L226 Difference]: Without dead ends: 471 [2022-04-06 20:38:49,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4033, Invalid=14599, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 20:38:49,325 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 227 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 8588 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 8763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 8588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:49,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 311 Invalid, 8763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 8588 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:38:49,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-04-06 20:38:49,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 299. [2022-04-06 20:38:49,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.2857142857142858) internal successors, (378), 294 states have internal predecessors, (378), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 382 transitions. [2022-04-06 20:38:49,467 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 382 transitions. Word has length 58 [2022-04-06 20:38:49,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:49,467 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 382 transitions. [2022-04-06 20:38:49,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:49,467 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 382 transitions. [2022-04-06 20:38:49,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:38:49,468 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:49,468 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:49,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:49,682 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-04-06 20:38:49,682 INFO L403 AbstractCegarLoop]: === Iteration 202 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:49,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1911369343, now seen corresponding path program 393 times [2022-04-06 20:38:49,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:49,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1944655354] [2022-04-06 20:38:49,683 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:49,683 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:49,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1911369343, now seen corresponding path program 394 times [2022-04-06 20:38:49,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:49,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707624384] [2022-04-06 20:38:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:49,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:49,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:38:49,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:49,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707624384] [2022-04-06 20:38:49,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707624384] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:49,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209489821] [2022-04-06 20:38:49,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:49,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:49,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:49,921 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:49,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-04-06 20:38:49,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:49,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:49,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 20:38:49,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:38:50,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:38:50,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209489821] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:50,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:50,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 23 [2022-04-06 20:38:50,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:50,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1944655354] [2022-04-06 20:38:50,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1944655354] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:50,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:50,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:38:50,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099989289] [2022-04-06 20:38:50,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:50,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:38:50,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:50,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:38:50,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:38:50,145 INFO L87 Difference]: Start difference. First operand 299 states and 382 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:52,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:52,141 INFO L93 Difference]: Finished difference Result 1214 states and 1641 transitions. [2022-04-06 20:38:52,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:38:52,142 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:38:52,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:52,143 INFO L225 Difference]: With dead ends: 1214 [2022-04-06 20:38:52,143 INFO L226 Difference]: Without dead ends: 1193 [2022-04-06 20:38:52,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:38:52,143 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 56 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:52,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 148 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:52,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-04-06 20:38:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 303. [2022-04-06 20:38:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 298 states have (on average 1.2885906040268456) internal successors, (384), 298 states have internal predecessors, (384), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:52,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 388 transitions. [2022-04-06 20:38:52,297 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 388 transitions. Word has length 59 [2022-04-06 20:38:52,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:52,297 INFO L478 AbstractCegarLoop]: Abstraction has 303 states and 388 transitions. [2022-04-06 20:38:52,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:52,297 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 388 transitions. [2022-04-06 20:38:52,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:38:52,297 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:52,297 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:52,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:52,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-04-06 20:38:52,513 INFO L403 AbstractCegarLoop]: === Iteration 203 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:52,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:52,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1059289519, now seen corresponding path program 395 times [2022-04-06 20:38:52,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:52,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1806754663] [2022-04-06 20:38:52,514 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:52,514 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:52,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1059289519, now seen corresponding path program 396 times [2022-04-06 20:38:52,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:52,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146083048] [2022-04-06 20:38:52,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:52,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:52,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:38:52,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:52,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146083048] [2022-04-06 20:38:52,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146083048] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:52,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888837528] [2022-04-06 20:38:52,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:52,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:52,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:52,998 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:52,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-04-06 20:38:56,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:38:56,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:56,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:38:56,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:38:56,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:38:57,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888837528] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:57,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:57,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:38:57,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:57,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1806754663] [2022-04-06 20:38:57,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1806754663] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:57,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:57,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:38:57,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292473415] [2022-04-06 20:38:57,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:57,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:38:57,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:57,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:38:57,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:38:57,360 INFO L87 Difference]: Start difference. First operand 303 states and 388 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:58,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:58,559 INFO L93 Difference]: Finished difference Result 344 states and 429 transitions. [2022-04-06 20:38:58,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:38:58,559 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:38:58,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:58,560 INFO L225 Difference]: With dead ends: 344 [2022-04-06 20:38:58,560 INFO L226 Difference]: Without dead ends: 322 [2022-04-06 20:38:58,560 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1956, Invalid=10034, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 20:38:58,560 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1773 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:58,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 125 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1773 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-04-06 20:38:58,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 304. [2022-04-06 20:38:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 299 states have (on average 1.2876254180602007) internal successors, (385), 299 states have internal predecessors, (385), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 389 transitions. [2022-04-06 20:38:58,709 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 389 transitions. Word has length 59 [2022-04-06 20:38:58,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:58,709 INFO L478 AbstractCegarLoop]: Abstraction has 304 states and 389 transitions. [2022-04-06 20:38:58,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 389 transitions. [2022-04-06 20:38:58,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:38:58,709 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:58,709 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:58,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-04-06 20:38:58,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-04-06 20:38:58,911 INFO L403 AbstractCegarLoop]: === Iteration 204 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:58,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1338005567, now seen corresponding path program 397 times [2022-04-06 20:38:58,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:58,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1328457615] [2022-04-06 20:38:58,912 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:58,912 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:58,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1338005567, now seen corresponding path program 398 times [2022-04-06 20:38:58,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:58,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305088207] [2022-04-06 20:38:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:58,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:59,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:38:59,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:59,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305088207] [2022-04-06 20:38:59,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305088207] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:59,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090140157] [2022-04-06 20:38:59,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:59,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:59,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:59,373 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:59,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-04-06 20:38:59,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:59,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:59,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:38:59,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:38:59,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:39:00,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090140157] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:00,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:00,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:39:00,469 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:00,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1328457615] [2022-04-06 20:39:00,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1328457615] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:00,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:00,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:39:00,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109814611] [2022-04-06 20:39:00,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:00,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:39:00,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:00,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:39:00,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=3439, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:39:00,470 INFO L87 Difference]: Start difference. First operand 304 states and 389 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:02,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:02,063 INFO L93 Difference]: Finished difference Result 347 states and 432 transitions. [2022-04-06 20:39:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:39:02,064 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:39:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:02,064 INFO L225 Difference]: With dead ends: 347 [2022-04-06 20:39:02,064 INFO L226 Difference]: Without dead ends: 324 [2022-04-06 20:39:02,065 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2192, Invalid=10918, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:39:02,065 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2457 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 2566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:02,065 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 172 Invalid, 2566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2457 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:39:02,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-04-06 20:39:02,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 305. [2022-04-06 20:39:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 300 states have (on average 1.2866666666666666) internal successors, (386), 300 states have internal predecessors, (386), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 390 transitions. [2022-04-06 20:39:02,214 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 390 transitions. Word has length 59 [2022-04-06 20:39:02,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:02,214 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 390 transitions. [2022-04-06 20:39:02,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 390 transitions. [2022-04-06 20:39:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:39:02,215 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:02,215 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:02,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:02,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:02,424 INFO L403 AbstractCegarLoop]: === Iteration 205 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:02,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:02,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1972244463, now seen corresponding path program 399 times [2022-04-06 20:39:02,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:02,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2090117036] [2022-04-06 20:39:02,425 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:02,425 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:02,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1972244463, now seen corresponding path program 400 times [2022-04-06 20:39:02,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:02,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460358250] [2022-04-06 20:39:02,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:02,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:02,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:39:02,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:02,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460358250] [2022-04-06 20:39:02,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460358250] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:02,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285127092] [2022-04-06 20:39:02,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:02,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:02,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:02,878 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:02,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-04-06 20:39:02,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:02,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:02,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:39:02,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:39:03,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:39:03,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285127092] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:03,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:03,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 20:39:03,855 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:03,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2090117036] [2022-04-06 20:39:03,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2090117036] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:03,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:03,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:39:03,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486179821] [2022-04-06 20:39:03,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:03,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:39:03,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:03,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:39:03,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=3192, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:39:03,856 INFO L87 Difference]: Start difference. First operand 305 states and 390 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:05,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:05,483 INFO L93 Difference]: Finished difference Result 350 states and 435 transitions. [2022-04-06 20:39:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:39:05,483 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:39:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:05,484 INFO L225 Difference]: With dead ends: 350 [2022-04-06 20:39:05,484 INFO L226 Difference]: Without dead ends: 326 [2022-04-06 20:39:05,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2263, Invalid=10847, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:39:05,484 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2186 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:05,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 139 Invalid, 2305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2186 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:39:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-04-06 20:39:05,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 306. [2022-04-06 20:39:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 301 states have (on average 1.2857142857142858) internal successors, (387), 301 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 391 transitions. [2022-04-06 20:39:05,638 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 391 transitions. Word has length 59 [2022-04-06 20:39:05,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:05,638 INFO L478 AbstractCegarLoop]: Abstraction has 306 states and 391 transitions. [2022-04-06 20:39:05,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:05,638 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 391 transitions. [2022-04-06 20:39:05,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:39:05,638 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:05,638 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:05,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-04-06 20:39:05,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:05,851 INFO L403 AbstractCegarLoop]: === Iteration 206 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:05,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:05,851 INFO L85 PathProgramCache]: Analyzing trace with hash 731841023, now seen corresponding path program 401 times [2022-04-06 20:39:05,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:05,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1556484100] [2022-04-06 20:39:05,852 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:05,852 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:05,852 INFO L85 PathProgramCache]: Analyzing trace with hash 731841023, now seen corresponding path program 402 times [2022-04-06 20:39:05,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:05,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057232099] [2022-04-06 20:39:05,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:05,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:06,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:39:06,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:06,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057232099] [2022-04-06 20:39:06,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057232099] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:06,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152524552] [2022-04-06 20:39:06,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:06,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:06,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:06,123 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:06,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-04-06 20:39:09,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 20:39:09,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:09,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:39:09,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:39:09,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:39:10,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152524552] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:10,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:10,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:39:10,066 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:10,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1556484100] [2022-04-06 20:39:10,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1556484100] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:10,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:10,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:39:10,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352158644] [2022-04-06 20:39:10,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:10,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:39:10,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:10,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:39:10,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=2951, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:39:10,068 INFO L87 Difference]: Start difference. First operand 306 states and 391 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:11,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:11,342 INFO L93 Difference]: Finished difference Result 353 states and 438 transitions. [2022-04-06 20:39:11,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:39:11,344 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:39:11,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:11,344 INFO L225 Difference]: With dead ends: 353 [2022-04-06 20:39:11,344 INFO L226 Difference]: Without dead ends: 328 [2022-04-06 20:39:11,345 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2131, Invalid=9859, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 20:39:11,345 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:11,345 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 146 Invalid, 2314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:39:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-04-06 20:39:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 307. [2022-04-06 20:39:11,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 302 states have (on average 1.2847682119205297) internal successors, (388), 302 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:11,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 392 transitions. [2022-04-06 20:39:11,499 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 392 transitions. Word has length 59 [2022-04-06 20:39:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:11,499 INFO L478 AbstractCegarLoop]: Abstraction has 307 states and 392 transitions. [2022-04-06 20:39:11,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 392 transitions. [2022-04-06 20:39:11,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:39:11,500 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:11,500 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:11,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:11,704 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-04-06 20:39:11,705 INFO L403 AbstractCegarLoop]: === Iteration 207 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:11,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:11,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1679874513, now seen corresponding path program 403 times [2022-04-06 20:39:11,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:11,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2032450046] [2022-04-06 20:39:11,705 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:11,706 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:11,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1679874513, now seen corresponding path program 404 times [2022-04-06 20:39:11,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:11,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390369115] [2022-04-06 20:39:11,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:11,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:11,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:39:11,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:11,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390369115] [2022-04-06 20:39:11,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390369115] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:11,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86979231] [2022-04-06 20:39:11,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:11,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:11,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:11,962 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:11,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-04-06 20:39:12,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:12,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:12,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:39:12,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:39:12,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:39:12,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86979231] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:12,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:12,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:39:12,899 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:12,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2032450046] [2022-04-06 20:39:12,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2032450046] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:12,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:12,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:39:12,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896890439] [2022-04-06 20:39:12,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:12,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:39:12,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:12,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:39:12,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=596, Invalid=2710, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:39:12,899 INFO L87 Difference]: Start difference. First operand 307 states and 392 transitions. Second operand has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:14,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:14,193 INFO L93 Difference]: Finished difference Result 356 states and 441 transitions. [2022-04-06 20:39:14,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:39:14,193 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:39:14,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:14,194 INFO L225 Difference]: With dead ends: 356 [2022-04-06 20:39:14,194 INFO L226 Difference]: Without dead ends: 330 [2022-04-06 20:39:14,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1838, Invalid=8062, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:39:14,194 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:14,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 153 Invalid, 2222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:39:14,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-04-06 20:39:14,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 308. [2022-04-06 20:39:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 303 states have (on average 1.283828382838284) internal successors, (389), 303 states have internal predecessors, (389), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:14,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 393 transitions. [2022-04-06 20:39:14,355 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 393 transitions. Word has length 59 [2022-04-06 20:39:14,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:14,355 INFO L478 AbstractCegarLoop]: Abstraction has 308 states and 393 transitions. [2022-04-06 20:39:14,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:14,355 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 393 transitions. [2022-04-06 20:39:14,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:39:14,355 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:14,355 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:14,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:14,566 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-04-06 20:39:14,566 INFO L403 AbstractCegarLoop]: === Iteration 208 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:14,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:14,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1336224703, now seen corresponding path program 405 times [2022-04-06 20:39:14,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:14,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1594982306] [2022-04-06 20:39:14,567 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:14,567 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:14,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1336224703, now seen corresponding path program 406 times [2022-04-06 20:39:14,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:14,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062536607] [2022-04-06 20:39:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:14,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:14,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:39:14,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:14,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062536607] [2022-04-06 20:39:14,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062536607] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:14,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974269338] [2022-04-06 20:39:14,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:14,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:14,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:14,904 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:14,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-04-06 20:39:14,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:14,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:14,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:39:14,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:39:15,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:39:15,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974269338] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:15,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:15,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 20:39:15,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:15,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1594982306] [2022-04-06 20:39:15,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1594982306] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:15,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:15,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:39:15,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25257731] [2022-04-06 20:39:15,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:15,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:39:15,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:15,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:39:15,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=2467, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:39:15,817 INFO L87 Difference]: Start difference. First operand 308 states and 393 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:16,893 INFO L93 Difference]: Finished difference Result 359 states and 444 transitions. [2022-04-06 20:39:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:39:16,893 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:39:16,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:16,894 INFO L225 Difference]: With dead ends: 359 [2022-04-06 20:39:16,894 INFO L226 Difference]: Without dead ends: 332 [2022-04-06 20:39:16,894 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1513, Invalid=6143, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:39:16,894 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 58 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1933 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:16,894 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 148 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1933 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:39:16,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-04-06 20:39:17,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 309. [2022-04-06 20:39:17,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 304 states have (on average 1.2828947368421053) internal successors, (390), 304 states have internal predecessors, (390), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:17,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 394 transitions. [2022-04-06 20:39:17,047 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 394 transitions. Word has length 59 [2022-04-06 20:39:17,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:17,047 INFO L478 AbstractCegarLoop]: Abstraction has 309 states and 394 transitions. [2022-04-06 20:39:17,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 394 transitions. [2022-04-06 20:39:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:39:17,047 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:17,047 INFO L499 BasicCegarLoop]: trace histogram [42, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:17,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-04-06 20:39:17,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:17,263 INFO L403 AbstractCegarLoop]: === Iteration 209 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:17,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:17,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1647132561, now seen corresponding path program 407 times [2022-04-06 20:39:17,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:17,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [720800157] [2022-04-06 20:39:17,268 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:17,268 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:17,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1647132561, now seen corresponding path program 408 times [2022-04-06 20:39:17,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:17,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135543843] [2022-04-06 20:39:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:17,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:18,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 904 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:18,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:18,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135543843] [2022-04-06 20:39:18,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135543843] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:18,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112317051] [2022-04-06 20:39:18,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:18,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:18,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:18,091 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:18,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-04-06 20:39:18,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:39:18,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:18,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:39:18,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-04-06 20:39:18,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-04-06 20:39:18,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112317051] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:18,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:18,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 6, 6] total 54 [2022-04-06 20:39:18,376 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:18,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [720800157] [2022-04-06 20:39:18,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [720800157] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:18,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:18,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:39:18,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689089649] [2022-04-06 20:39:18,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:18,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:39:18,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:18,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:39:18,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2744, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:39:18,377 INFO L87 Difference]: Start difference. First operand 309 states and 394 transitions. Second operand has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:21,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:21,339 INFO L93 Difference]: Finished difference Result 513 states and 762 transitions. [2022-04-06 20:39:21,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:39:21,339 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:39:21,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:21,339 INFO L225 Difference]: With dead ends: 513 [2022-04-06 20:39:21,339 INFO L226 Difference]: Without dead ends: 505 [2022-04-06 20:39:21,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=321, Invalid=9579, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:39:21,340 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 235 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 8852 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 9031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 8852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:21,340 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 314 Invalid, 9031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 8852 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:39:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-04-06 20:39:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 315. [2022-04-06 20:39:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.2838709677419355) internal successors, (398), 310 states have internal predecessors, (398), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 402 transitions. [2022-04-06 20:39:21,496 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 402 transitions. Word has length 59 [2022-04-06 20:39:21,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:21,496 INFO L478 AbstractCegarLoop]: Abstraction has 315 states and 402 transitions. [2022-04-06 20:39:21,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:21,496 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 402 transitions. [2022-04-06 20:39:21,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 20:39:21,497 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:21,497 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:21,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-04-06 20:39:21,712 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2022-04-06 20:39:21,712 INFO L403 AbstractCegarLoop]: === Iteration 210 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:21,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:21,712 INFO L85 PathProgramCache]: Analyzing trace with hash 923662719, now seen corresponding path program 409 times [2022-04-06 20:39:21,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:21,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1963389823] [2022-04-06 20:39:21,713 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:21,713 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:21,713 INFO L85 PathProgramCache]: Analyzing trace with hash 923662719, now seen corresponding path program 410 times [2022-04-06 20:39:21,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:21,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464835471] [2022-04-06 20:39:21,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:21,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:22,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:39:22,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:22,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464835471] [2022-04-06 20:39:22,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464835471] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:22,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70024855] [2022-04-06 20:39:22,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:22,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:22,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:22,042 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:22,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-04-06 20:39:22,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:22,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:22,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-06 20:39:22,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:39:22,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:39:23,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70024855] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:23,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:23,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 83 [2022-04-06 20:39:23,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:23,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1963389823] [2022-04-06 20:39:23,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1963389823] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:23,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:23,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:39:23,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10156194] [2022-04-06 20:39:23,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:23,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:39:23,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:23,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:39:23,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=963, Invalid=5843, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:39:23,565 INFO L87 Difference]: Start difference. First operand 315 states and 402 transitions. Second operand has 35 states, 35 states have (on average 1.2) internal successors, (42), 34 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:24,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:24,450 INFO L93 Difference]: Finished difference Result 336 states and 422 transitions. [2022-04-06 20:39:24,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:39:24,451 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2) internal successors, (42), 34 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-04-06 20:39:24,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:24,451 INFO L225 Difference]: With dead ends: 336 [2022-04-06 20:39:24,451 INFO L226 Difference]: Without dead ends: 297 [2022-04-06 20:39:24,452 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1875, Invalid=11235, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:39:24,452 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:24,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 176 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:39:24,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-04-06 20:39:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2022-04-06 20:39:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.2945205479452055) internal successors, (378), 292 states have internal predecessors, (378), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 382 transitions. [2022-04-06 20:39:24,601 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 382 transitions. Word has length 60 [2022-04-06 20:39:24,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:24,602 INFO L478 AbstractCegarLoop]: Abstraction has 297 states and 382 transitions. [2022-04-06 20:39:24,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2) internal successors, (42), 34 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 382 transitions. [2022-04-06 20:39:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 20:39:24,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:24,602 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:24,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:24,806 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:24,806 INFO L403 AbstractCegarLoop]: === Iteration 211 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:24,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:24,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1727188749, now seen corresponding path program 411 times [2022-04-06 20:39:24,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:24,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [775729660] [2022-04-06 20:39:24,807 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:24,807 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:24,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1727188749, now seen corresponding path program 412 times [2022-04-06 20:39:24,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:24,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789385421] [2022-04-06 20:39:24,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:24,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:25,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 0 proven. 241 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:39:25,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:25,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789385421] [2022-04-06 20:39:25,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789385421] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:25,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789542175] [2022-04-06 20:39:25,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:25,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:25,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:25,251 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:25,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-04-06 20:39:25,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:25,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:25,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 94 conjunts are in the unsatisfiable core [2022-04-06 20:39:25,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 0 proven. 241 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:39:25,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 30 proven. 210 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-04-06 20:39:26,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789542175] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:26,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:26,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 32] total 80 [2022-04-06 20:39:26,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:26,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [775729660] [2022-04-06 20:39:26,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [775729660] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:26,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:26,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:39:26,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352926512] [2022-04-06 20:39:26,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:26,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:39:26,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:26,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:39:26,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=5648, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:39:26,685 INFO L87 Difference]: Start difference. First operand 297 states and 382 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:27,794 INFO L93 Difference]: Finished difference Result 338 states and 423 transitions. [2022-04-06 20:39:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:39:27,794 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-04-06 20:39:27,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:27,794 INFO L225 Difference]: With dead ends: 338 [2022-04-06 20:39:27,794 INFO L226 Difference]: Without dead ends: 316 [2022-04-06 20:39:27,795 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2163 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1102, Invalid=11330, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:39:27,795 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:27,795 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 138 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:39:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-04-06 20:39:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 298. [2022-04-06 20:39:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.2935153583617747) internal successors, (379), 293 states have internal predecessors, (379), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:27,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 383 transitions. [2022-04-06 20:39:27,944 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 383 transitions. Word has length 60 [2022-04-06 20:39:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:27,945 INFO L478 AbstractCegarLoop]: Abstraction has 298 states and 383 transitions. [2022-04-06 20:39:27,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:27,945 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 383 transitions. [2022-04-06 20:39:27,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 20:39:27,945 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:27,945 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:27,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:28,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-04-06 20:39:28,156 INFO L403 AbstractCegarLoop]: === Iteration 212 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:28,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:28,156 INFO L85 PathProgramCache]: Analyzing trace with hash -573087873, now seen corresponding path program 413 times [2022-04-06 20:39:28,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:28,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2098066492] [2022-04-06 20:39:28,157 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:28,157 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:28,157 INFO L85 PathProgramCache]: Analyzing trace with hash -573087873, now seen corresponding path program 414 times [2022-04-06 20:39:28,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:28,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695534065] [2022-04-06 20:39:28,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:28,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:28,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:39:28,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:28,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695534065] [2022-04-06 20:39:28,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695534065] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:28,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544399976] [2022-04-06 20:39:28,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:28,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:28,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:28,691 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:28,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-04-06 20:39:30,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 20:39:30,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:30,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 20:39:30,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:39:31,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 17 proven. 231 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:39:31,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544399976] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:31,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:31,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 34] total 79 [2022-04-06 20:39:31,980 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:31,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2098066492] [2022-04-06 20:39:31,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2098066492] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:31,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:31,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:39:31,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522742176] [2022-04-06 20:39:31,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:31,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:39:31,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:31,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:39:31,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1109, Invalid=5053, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:39:31,981 INFO L87 Difference]: Start difference. First operand 298 states and 383 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:33,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:33,113 INFO L93 Difference]: Finished difference Result 341 states and 426 transitions. [2022-04-06 20:39:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:39:33,114 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-04-06 20:39:33,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:33,114 INFO L225 Difference]: With dead ends: 341 [2022-04-06 20:39:33,114 INFO L226 Difference]: Without dead ends: 318 [2022-04-06 20:39:33,115 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2727 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2459, Invalid=12303, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 20:39:33,115 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:33,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 135 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:39:33,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-04-06 20:39:33,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 299. [2022-04-06 20:39:33,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.2925170068027212) internal successors, (380), 294 states have internal predecessors, (380), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:33,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 384 transitions. [2022-04-06 20:39:33,262 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 384 transitions. Word has length 60 [2022-04-06 20:39:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:33,263 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 384 transitions. [2022-04-06 20:39:33,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:33,263 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 384 transitions. [2022-04-06 20:39:33,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 20:39:33,263 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:33,263 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:33,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:33,468 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-04-06 20:39:33,468 INFO L403 AbstractCegarLoop]: === Iteration 213 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:33,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2056167693, now seen corresponding path program 415 times [2022-04-06 20:39:33,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:33,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1710559468] [2022-04-06 20:39:33,469 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:33,469 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:33,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2056167693, now seen corresponding path program 416 times [2022-04-06 20:39:33,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:33,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272006509] [2022-04-06 20:39:33,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:33,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:33,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:39:33,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:33,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272006509] [2022-04-06 20:39:33,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272006509] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:33,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804140904] [2022-04-06 20:39:33,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:33,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:33,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:33,782 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:33,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-04-06 20:39:33,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:33,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:33,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:39:33,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:39:33,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:39:34,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804140904] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:34,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:34,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:39:34,980 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:34,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1710559468] [2022-04-06 20:39:34,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1710559468] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:34,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:34,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:39:34,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325894933] [2022-04-06 20:39:34,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:34,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:39:34,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:39:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=3420, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:39:34,981 INFO L87 Difference]: Start difference. First operand 299 states and 384 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:36,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:36,357 INFO L93 Difference]: Finished difference Result 344 states and 429 transitions. [2022-04-06 20:39:36,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:39:36,357 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-04-06 20:39:36,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:36,358 INFO L225 Difference]: With dead ends: 344 [2022-04-06 20:39:36,358 INFO L226 Difference]: Without dead ends: 320 [2022-04-06 20:39:36,358 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2157, Invalid=10499, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 20:39:36,358 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:36,358 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 157 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:39:36,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-04-06 20:39:36,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 300. [2022-04-06 20:39:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.2915254237288136) internal successors, (381), 295 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:36,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 385 transitions. [2022-04-06 20:39:36,511 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 385 transitions. Word has length 60 [2022-04-06 20:39:36,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:36,511 INFO L478 AbstractCegarLoop]: Abstraction has 300 states and 385 transitions. [2022-04-06 20:39:36,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:36,511 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 385 transitions. [2022-04-06 20:39:36,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 20:39:36,512 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:36,512 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:36,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:36,728 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-04-06 20:39:36,728 INFO L403 AbstractCegarLoop]: === Iteration 214 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:36,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1752279681, now seen corresponding path program 417 times [2022-04-06 20:39:36,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:36,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1022554751] [2022-04-06 20:39:36,729 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:36,729 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:36,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1752279681, now seen corresponding path program 418 times [2022-04-06 20:39:36,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:36,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112281151] [2022-04-06 20:39:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:36,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:37,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:39:37,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:37,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112281151] [2022-04-06 20:39:37,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112281151] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:37,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730789229] [2022-04-06 20:39:37,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:37,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:37,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:37,147 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:37,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-04-06 20:39:37,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:37,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:37,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:39:37,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:39:37,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:39:38,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730789229] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:38,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:38,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 20:39:38,408 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:38,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1022554751] [2022-04-06 20:39:38,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1022554751] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:38,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:38,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:39:38,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594464131] [2022-04-06 20:39:38,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:38,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:39:38,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:38,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:39:38,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=3171, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:39:38,409 INFO L87 Difference]: Start difference. First operand 300 states and 385 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:39,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:39,720 INFO L93 Difference]: Finished difference Result 347 states and 432 transitions. [2022-04-06 20:39:39,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:39:39,720 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-04-06 20:39:39,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:39,720 INFO L225 Difference]: With dead ends: 347 [2022-04-06 20:39:39,720 INFO L226 Difference]: Without dead ends: 322 [2022-04-06 20:39:39,721 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2184, Invalid=10248, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:39:39,721 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2238 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:39,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 149 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2238 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:39:39,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-04-06 20:39:39,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 301. [2022-04-06 20:39:39,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 296 states have (on average 1.2905405405405406) internal successors, (382), 296 states have internal predecessors, (382), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:39,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 386 transitions. [2022-04-06 20:39:39,874 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 386 transitions. Word has length 60 [2022-04-06 20:39:39,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:39,874 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 386 transitions. [2022-04-06 20:39:39,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:39,874 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 386 transitions. [2022-04-06 20:39:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 20:39:39,875 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:39,875 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:39,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-04-06 20:39:40,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-04-06 20:39:40,091 INFO L403 AbstractCegarLoop]: === Iteration 215 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:40,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1017963277, now seen corresponding path program 419 times [2022-04-06 20:39:40,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:40,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [112025993] [2022-04-06 20:39:40,092 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:40,092 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:40,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1017963277, now seen corresponding path program 420 times [2022-04-06 20:39:40,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:40,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144196551] [2022-04-06 20:39:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:40,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:40,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:39:40,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:40,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144196551] [2022-04-06 20:39:40,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144196551] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:40,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857623167] [2022-04-06 20:39:40,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:40,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:40,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:40,411 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:40,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-04-06 20:39:43,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 20:39:43,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:43,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:39:43,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:39:43,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:39:44,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857623167] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:44,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:44,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:39:44,389 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:44,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [112025993] [2022-04-06 20:39:44,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [112025993] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:44,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:44,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:39:44,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855442254] [2022-04-06 20:39:44,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:44,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:39:44,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:44,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:39:44,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614, Invalid=2926, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:39:44,390 INFO L87 Difference]: Start difference. First operand 301 states and 386 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:45,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:45,732 INFO L93 Difference]: Finished difference Result 350 states and 435 transitions. [2022-04-06 20:39:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:39:45,732 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-04-06 20:39:45,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:45,733 INFO L225 Difference]: With dead ends: 350 [2022-04-06 20:39:45,733 INFO L226 Difference]: Without dead ends: 324 [2022-04-06 20:39:45,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2022, Invalid=9108, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:39:45,734 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2299 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:45,734 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 161 Invalid, 2404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2299 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:39:45,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-04-06 20:39:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 302. [2022-04-06 20:39:45,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 297 states have (on average 1.2895622895622896) internal successors, (383), 297 states have internal predecessors, (383), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:45,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 387 transitions. [2022-04-06 20:39:45,889 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 387 transitions. Word has length 60 [2022-04-06 20:39:45,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:45,889 INFO L478 AbstractCegarLoop]: Abstraction has 302 states and 387 transitions. [2022-04-06 20:39:45,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:45,890 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 387 transitions. [2022-04-06 20:39:45,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 20:39:45,890 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:45,890 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:45,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-04-06 20:39:46,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:46,095 INFO L403 AbstractCegarLoop]: === Iteration 216 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:46,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:46,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1617765505, now seen corresponding path program 421 times [2022-04-06 20:39:46,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:46,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [679866374] [2022-04-06 20:39:46,096 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:46,096 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:46,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1617765505, now seen corresponding path program 422 times [2022-04-06 20:39:46,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:46,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388051876] [2022-04-06 20:39:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:46,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:46,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 241 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:39:46,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:46,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388051876] [2022-04-06 20:39:46,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388051876] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:46,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044005573] [2022-04-06 20:39:46,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:46,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:46,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:46,379 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:46,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-04-06 20:39:46,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:46,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:46,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:39:46,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 241 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:39:46,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 241 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:39:47,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044005573] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:47,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:47,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:39:47,193 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:47,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [679866374] [2022-04-06 20:39:47,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [679866374] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:47,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:47,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:39:47,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308996710] [2022-04-06 20:39:47,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:47,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:39:47,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:47,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:39:47,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=2679, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:39:47,194 INFO L87 Difference]: Start difference. First operand 302 states and 387 transitions. Second operand has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:48,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:48,224 INFO L93 Difference]: Finished difference Result 353 states and 438 transitions. [2022-04-06 20:39:48,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:39:48,224 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-04-06 20:39:48,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:48,224 INFO L225 Difference]: With dead ends: 353 [2022-04-06 20:39:48,224 INFO L226 Difference]: Without dead ends: 326 [2022-04-06 20:39:48,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1709, Invalid=7221, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:39:48,225 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 51 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:48,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 149 Invalid, 2088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2004 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:39:48,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-04-06 20:39:48,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 303. [2022-04-06 20:39:48,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 298 states have (on average 1.2885906040268456) internal successors, (384), 298 states have internal predecessors, (384), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:48,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 388 transitions. [2022-04-06 20:39:48,379 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 388 transitions. Word has length 60 [2022-04-06 20:39:48,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:48,379 INFO L478 AbstractCegarLoop]: Abstraction has 303 states and 388 transitions. [2022-04-06 20:39:48,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:48,379 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 388 transitions. [2022-04-06 20:39:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 20:39:48,380 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:48,380 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:48,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:48,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2022-04-06 20:39:48,595 INFO L403 AbstractCegarLoop]: === Iteration 217 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:48,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1251109619, now seen corresponding path program 423 times [2022-04-06 20:39:48,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:48,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2112118612] [2022-04-06 20:39:48,596 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:48,596 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1251109619, now seen corresponding path program 424 times [2022-04-06 20:39:48,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:48,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657086981] [2022-04-06 20:39:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:48,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:48,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:39:48,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:48,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657086981] [2022-04-06 20:39:48,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657086981] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:48,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148197083] [2022-04-06 20:39:48,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:48,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:48,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:48,925 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:48,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-04-06 20:39:48,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:48,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:48,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:39:48,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:39:49,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:39:49,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148197083] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:49,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:49,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 20:39:49,784 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:49,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2112118612] [2022-04-06 20:39:49,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2112118612] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:49,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:49,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:39:49,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505360278] [2022-04-06 20:39:49,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:49,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:39:49,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:49,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:39:49,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=2430, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:39:49,785 INFO L87 Difference]: Start difference. First operand 303 states and 388 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:51,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:51,073 INFO L93 Difference]: Finished difference Result 356 states and 441 transitions. [2022-04-06 20:39:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:39:51,073 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-04-06 20:39:51,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:51,074 INFO L225 Difference]: With dead ends: 356 [2022-04-06 20:39:51,074 INFO L226 Difference]: Without dead ends: 328 [2022-04-06 20:39:51,074 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1466, Invalid=5674, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:39:51,074 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 60 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:51,074 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 162 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2110 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:39:51,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-04-06 20:39:51,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 304. [2022-04-06 20:39:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 299 states have (on average 1.2876254180602007) internal successors, (385), 299 states have internal predecessors, (385), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:51,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 389 transitions. [2022-04-06 20:39:51,232 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 389 transitions. Word has length 60 [2022-04-06 20:39:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:51,232 INFO L478 AbstractCegarLoop]: Abstraction has 304 states and 389 transitions. [2022-04-06 20:39:51,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:51,233 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 389 transitions. [2022-04-06 20:39:51,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 20:39:51,233 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:51,233 INFO L499 BasicCegarLoop]: trace histogram [43, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:51,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:51,448 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:51,449 INFO L403 AbstractCegarLoop]: === Iteration 218 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:51,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:51,449 INFO L85 PathProgramCache]: Analyzing trace with hash -65053010, now seen corresponding path program 425 times [2022-04-06 20:39:51,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:51,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [117892261] [2022-04-06 20:39:51,449 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:51,449 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:51,450 INFO L85 PathProgramCache]: Analyzing trace with hash -65053010, now seen corresponding path program 426 times [2022-04-06 20:39:51,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:51,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404467399] [2022-04-06 20:39:51,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:51,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:52,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 947 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:52,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:52,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404467399] [2022-04-06 20:39:52,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404467399] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:52,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074540243] [2022-04-06 20:39:52,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:52,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:52,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:52,391 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:52,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-04-06 20:39:52,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:39:52,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:52,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:39:52,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-04-06 20:39:52,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-04-06 20:39:52,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074540243] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:52,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:52,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 6, 6] total 55 [2022-04-06 20:39:52,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:52,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [117892261] [2022-04-06 20:39:52,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [117892261] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:52,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:52,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 20:39:52,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945499472] [2022-04-06 20:39:52,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:52,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 20:39:52,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:52,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 20:39:52,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2850, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:39:52,668 INFO L87 Difference]: Start difference. First operand 304 states and 389 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:55,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:55,573 INFO L93 Difference]: Finished difference Result 509 states and 759 transitions. [2022-04-06 20:39:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:39:55,573 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-04-06 20:39:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:55,573 INFO L225 Difference]: With dead ends: 509 [2022-04-06 20:39:55,573 INFO L226 Difference]: Without dead ends: 501 [2022-04-06 20:39:55,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=327, Invalid=9975, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:39:55,574 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 235 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 9145 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 9328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 9145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:55,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 319 Invalid, 9328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 9145 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:39:55,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-04-06 20:39:55,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 310. [2022-04-06 20:39:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 305 states have (on average 1.2885245901639344) internal successors, (393), 305 states have internal predecessors, (393), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 397 transitions. [2022-04-06 20:39:55,733 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 397 transitions. Word has length 60 [2022-04-06 20:39:55,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:55,733 INFO L478 AbstractCegarLoop]: Abstraction has 310 states and 397 transitions. [2022-04-06 20:39:55,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:55,733 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 397 transitions. [2022-04-06 20:39:55,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:39:55,733 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:55,733 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:55,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:55,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:55,943 INFO L403 AbstractCegarLoop]: === Iteration 219 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:55,943 INFO L85 PathProgramCache]: Analyzing trace with hash 957228399, now seen corresponding path program 427 times [2022-04-06 20:39:55,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:55,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2131685403] [2022-04-06 20:39:55,944 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:55,944 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash 957228399, now seen corresponding path program 428 times [2022-04-06 20:39:55,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:55,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970404447] [2022-04-06 20:39:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:55,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:56,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:39:56,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:56,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970404447] [2022-04-06 20:39:56,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970404447] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:56,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550308391] [2022-04-06 20:39:56,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:56,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:56,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:56,521 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:56,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-04-06 20:39:56,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:56,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:56,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 98 conjunts are in the unsatisfiable core [2022-04-06 20:39:56,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:39:57,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:39:58,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550308391] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:58,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:58,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 34] total 84 [2022-04-06 20:39:58,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:58,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2131685403] [2022-04-06 20:39:58,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2131685403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:58,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:58,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:39:58,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100617896] [2022-04-06 20:39:58,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:58,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:39:58,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:58,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:39:58,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=6229, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:39:58,520 INFO L87 Difference]: Start difference. First operand 310 states and 397 transitions. Second operand has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:59,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:59,771 INFO L93 Difference]: Finished difference Result 351 states and 438 transitions. [2022-04-06 20:39:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:39:59,771 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 20:39:59,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:59,771 INFO L225 Difference]: With dead ends: 351 [2022-04-06 20:39:59,771 INFO L226 Difference]: Without dead ends: 329 [2022-04-06 20:39:59,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1211, Invalid=12361, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 20:39:59,772 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:59,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 173 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:39:59,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-04-06 20:39:59,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 311. [2022-04-06 20:39:59,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 306 states have (on average 1.2875816993464053) internal successors, (394), 306 states have internal predecessors, (394), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:59,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 398 transitions. [2022-04-06 20:39:59,932 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 398 transitions. Word has length 61 [2022-04-06 20:39:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:59,932 INFO L478 AbstractCegarLoop]: Abstraction has 311 states and 398 transitions. [2022-04-06 20:39:59,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:59,932 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 398 transitions. [2022-04-06 20:39:59,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:39:59,932 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:59,932 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:59,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:00,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2022-04-06 20:40:00,148 INFO L403 AbstractCegarLoop]: === Iteration 220 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:00,148 INFO L85 PathProgramCache]: Analyzing trace with hash 312557631, now seen corresponding path program 429 times [2022-04-06 20:40:00,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:00,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2074540236] [2022-04-06 20:40:00,149 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:00,149 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:00,149 INFO L85 PathProgramCache]: Analyzing trace with hash 312557631, now seen corresponding path program 430 times [2022-04-06 20:40:00,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:00,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603116574] [2022-04-06 20:40:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:00,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:00,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:40:00,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:00,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603116574] [2022-04-06 20:40:00,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603116574] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:00,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490127497] [2022-04-06 20:40:00,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:00,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:00,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:00,507 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:00,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-04-06 20:40:00,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:00,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:00,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:40:00,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:40:00,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:40:01,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490127497] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:01,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:01,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 20:40:01,521 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:01,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2074540236] [2022-04-06 20:40:01,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2074540236] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:01,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:01,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:40:01,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162020338] [2022-04-06 20:40:01,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:01,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:40:01,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:01,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:40:01,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=3909, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:40:01,521 INFO L87 Difference]: Start difference. First operand 311 states and 398 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:02,818 INFO L93 Difference]: Finished difference Result 354 states and 441 transitions. [2022-04-06 20:40:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:40:02,818 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 20:40:02,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:02,818 INFO L225 Difference]: With dead ends: 354 [2022-04-06 20:40:02,819 INFO L226 Difference]: Without dead ends: 331 [2022-04-06 20:40:02,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2067, Invalid=10589, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 20:40:02,819 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:02,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 125 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:40:02,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-04-06 20:40:02,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 312. [2022-04-06 20:40:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.286644951140065) internal successors, (395), 307 states have internal predecessors, (395), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:02,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 399 transitions. [2022-04-06 20:40:02,981 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 399 transitions. Word has length 61 [2022-04-06 20:40:02,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:02,981 INFO L478 AbstractCegarLoop]: Abstraction has 312 states and 399 transitions. [2022-04-06 20:40:02,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:02,981 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 399 transitions. [2022-04-06 20:40:02,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:40:02,981 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:02,981 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:02,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:03,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:03,187 INFO L403 AbstractCegarLoop]: === Iteration 221 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:03,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:03,188 INFO L85 PathProgramCache]: Analyzing trace with hash 362820527, now seen corresponding path program 431 times [2022-04-06 20:40:03,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:03,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1203195163] [2022-04-06 20:40:03,188 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:03,188 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:03,188 INFO L85 PathProgramCache]: Analyzing trace with hash 362820527, now seen corresponding path program 432 times [2022-04-06 20:40:03,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:03,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673290333] [2022-04-06 20:40:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:03,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:03,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:40:03,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:03,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673290333] [2022-04-06 20:40:03,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673290333] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:03,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579334603] [2022-04-06 20:40:03,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:03,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:03,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:03,535 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:03,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-04-06 20:40:06,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 20:40:06,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:06,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:40:06,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:40:06,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:40:07,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579334603] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:07,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:07,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:40:07,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:07,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1203195163] [2022-04-06 20:40:07,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1203195163] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:07,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:07,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:40:07,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446575367] [2022-04-06 20:40:07,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:07,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:40:07,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:07,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:40:07,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=3654, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:40:07,434 INFO L87 Difference]: Start difference. First operand 312 states and 399 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:09,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:09,131 INFO L93 Difference]: Finished difference Result 357 states and 444 transitions. [2022-04-06 20:40:09,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:40:09,131 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 20:40:09,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:09,132 INFO L225 Difference]: With dead ends: 357 [2022-04-06 20:40:09,132 INFO L226 Difference]: Without dead ends: 333 [2022-04-06 20:40:09,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2315, Invalid=11491, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 20:40:09,132 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 2396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:09,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 147 Invalid, 2396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:40:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-04-06 20:40:09,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 313. [2022-04-06 20:40:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.2857142857142858) internal successors, (396), 308 states have internal predecessors, (396), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:09,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 400 transitions. [2022-04-06 20:40:09,300 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 400 transitions. Word has length 61 [2022-04-06 20:40:09,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:09,300 INFO L478 AbstractCegarLoop]: Abstraction has 313 states and 400 transitions. [2022-04-06 20:40:09,300 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:09,300 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 400 transitions. [2022-04-06 20:40:09,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:40:09,300 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:09,300 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:09,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-04-06 20:40:09,505 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:09,505 INFO L403 AbstractCegarLoop]: === Iteration 222 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:09,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:09,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1450610177, now seen corresponding path program 433 times [2022-04-06 20:40:09,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:09,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1168700781] [2022-04-06 20:40:09,506 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:09,506 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:09,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1450610177, now seen corresponding path program 434 times [2022-04-06 20:40:09,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:09,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465734895] [2022-04-06 20:40:09,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:09,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:09,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:40:09,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:09,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465734895] [2022-04-06 20:40:09,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465734895] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:09,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317551871] [2022-04-06 20:40:09,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:09,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:09,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:09,847 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:09,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-04-06 20:40:09,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:09,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:09,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:40:09,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:40:09,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:40:10,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317551871] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:10,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:10,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:40:10,759 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:10,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1168700781] [2022-04-06 20:40:10,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1168700781] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:10,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:10,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:40:10,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729130673] [2022-04-06 20:40:10,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:10,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:40:10,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:10,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:40:10,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=3397, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:40:10,760 INFO L87 Difference]: Start difference. First operand 313 states and 400 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:12,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:12,275 INFO L93 Difference]: Finished difference Result 360 states and 447 transitions. [2022-04-06 20:40:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 20:40:12,275 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 20:40:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:12,275 INFO L225 Difference]: With dead ends: 360 [2022-04-06 20:40:12,276 INFO L226 Difference]: Without dead ends: 335 [2022-04-06 20:40:12,276 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2389, Invalid=11417, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 20:40:12,276 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2608 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:12,276 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 169 Invalid, 2728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2608 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:40:12,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-04-06 20:40:12,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 314. [2022-04-06 20:40:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 309 states have (on average 1.284789644012945) internal successors, (397), 309 states have internal predecessors, (397), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:12,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 401 transitions. [2022-04-06 20:40:12,443 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 401 transitions. Word has length 61 [2022-04-06 20:40:12,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:12,443 INFO L478 AbstractCegarLoop]: Abstraction has 314 states and 401 transitions. [2022-04-06 20:40:12,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 401 transitions. [2022-04-06 20:40:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:40:12,443 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:12,444 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:12,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-04-06 20:40:12,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-04-06 20:40:12,659 INFO L403 AbstractCegarLoop]: === Iteration 223 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:12,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:12,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1248411153, now seen corresponding path program 435 times [2022-04-06 20:40:12,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:12,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2106180666] [2022-04-06 20:40:12,660 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:12,660 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:12,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1248411153, now seen corresponding path program 436 times [2022-04-06 20:40:12,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:12,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13957767] [2022-04-06 20:40:12,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:12,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:12,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:40:12,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:12,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13957767] [2022-04-06 20:40:12,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13957767] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:12,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374706004] [2022-04-06 20:40:12,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:12,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:12,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:12,987 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:12,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-04-06 20:40:13,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:13,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:13,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:40:13,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:40:13,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:40:13,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374706004] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:13,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:13,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 20:40:13,863 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:13,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2106180666] [2022-04-06 20:40:13,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2106180666] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:13,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:13,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:40:13,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695888837] [2022-04-06 20:40:13,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:13,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:40:13,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:13,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:40:13,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=3148, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:40:13,864 INFO L87 Difference]: Start difference. First operand 314 states and 401 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:15,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:15,162 INFO L93 Difference]: Finished difference Result 363 states and 450 transitions. [2022-04-06 20:40:15,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:40:15,163 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 20:40:15,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:15,163 INFO L225 Difference]: With dead ends: 363 [2022-04-06 20:40:15,163 INFO L226 Difference]: Without dead ends: 337 [2022-04-06 20:40:15,164 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2251, Invalid=10405, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 20:40:15,165 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:15,165 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 151 Invalid, 2456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:40:15,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-04-06 20:40:15,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 315. [2022-04-06 20:40:15,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.2838709677419355) internal successors, (398), 310 states have internal predecessors, (398), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:15,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 402 transitions. [2022-04-06 20:40:15,331 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 402 transitions. Word has length 61 [2022-04-06 20:40:15,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:15,331 INFO L478 AbstractCegarLoop]: Abstraction has 315 states and 402 transitions. [2022-04-06 20:40:15,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 402 transitions. [2022-04-06 20:40:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:40:15,331 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:15,331 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:15,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-04-06 20:40:15,542 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-04-06 20:40:15,542 INFO L403 AbstractCegarLoop]: === Iteration 224 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:15,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:15,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1297818559, now seen corresponding path program 437 times [2022-04-06 20:40:15,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:15,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2067767807] [2022-04-06 20:40:15,543 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:15,543 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:15,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1297818559, now seen corresponding path program 438 times [2022-04-06 20:40:15,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:15,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998127181] [2022-04-06 20:40:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:15,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:15,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:40:15,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:15,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998127181] [2022-04-06 20:40:15,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998127181] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:15,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350840845] [2022-04-06 20:40:15,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:15,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:15,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:15,993 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:15,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-04-06 20:40:18,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 20:40:18,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:18,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:40:18,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:40:18,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:40:19,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350840845] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:19,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:19,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:40:19,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:19,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2067767807] [2022-04-06 20:40:19,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2067767807] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:19,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:19,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:40:19,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300647355] [2022-04-06 20:40:19,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:19,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:40:19,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:19,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:40:19,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=2897, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:40:19,706 INFO L87 Difference]: Start difference. First operand 315 states and 402 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:21,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:21,052 INFO L93 Difference]: Finished difference Result 366 states and 453 transitions. [2022-04-06 20:40:21,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:40:21,053 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 20:40:21,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:21,053 INFO L225 Difference]: With dead ends: 366 [2022-04-06 20:40:21,053 INFO L226 Difference]: Without dead ends: 339 [2022-04-06 20:40:21,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1953, Invalid=8553, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:40:21,054 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2197 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:21,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 153 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2197 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:40:21,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-04-06 20:40:21,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 316. [2022-04-06 20:40:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 311 states have (on average 1.2829581993569132) internal successors, (399), 311 states have internal predecessors, (399), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 403 transitions. [2022-04-06 20:40:21,219 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 403 transitions. Word has length 61 [2022-04-06 20:40:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:21,219 INFO L478 AbstractCegarLoop]: Abstraction has 316 states and 403 transitions. [2022-04-06 20:40:21,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 403 transitions. [2022-04-06 20:40:21,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:40:21,220 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:21,220 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:21,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:21,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-04-06 20:40:21,425 INFO L403 AbstractCegarLoop]: === Iteration 225 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:21,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:21,425 INFO L85 PathProgramCache]: Analyzing trace with hash 307613743, now seen corresponding path program 439 times [2022-04-06 20:40:21,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:21,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1660016479] [2022-04-06 20:40:21,425 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:21,426 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:21,426 INFO L85 PathProgramCache]: Analyzing trace with hash 307613743, now seen corresponding path program 440 times [2022-04-06 20:40:21,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:21,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910970381] [2022-04-06 20:40:21,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:21,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:21,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:40:21,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:21,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910970381] [2022-04-06 20:40:21,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910970381] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:21,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128750858] [2022-04-06 20:40:21,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:21,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:21,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:21,793 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:21,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-04-06 20:40:21,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:21,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:21,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:40:21,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:40:21,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:40:22,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128750858] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:22,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:22,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:40:22,659 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:22,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1660016479] [2022-04-06 20:40:22,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1660016479] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:22,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:22,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:40:22,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337849500] [2022-04-06 20:40:22,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:22,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:40:22,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:22,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:40:22,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=2644, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:40:22,663 INFO L87 Difference]: Start difference. First operand 316 states and 403 transitions. Second operand has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:23,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:23,877 INFO L93 Difference]: Finished difference Result 369 states and 456 transitions. [2022-04-06 20:40:23,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:40:23,878 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 20:40:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:23,878 INFO L225 Difference]: With dead ends: 369 [2022-04-06 20:40:23,878 INFO L226 Difference]: Without dead ends: 341 [2022-04-06 20:40:23,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1621, Invalid=6569, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:40:23,879 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 58 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:23,879 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 168 Invalid, 2365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2293 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:40:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-04-06 20:40:24,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 317. [2022-04-06 20:40:24,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 312 states have (on average 1.2820512820512822) internal successors, (400), 312 states have internal predecessors, (400), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:24,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 404 transitions. [2022-04-06 20:40:24,046 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 404 transitions. Word has length 61 [2022-04-06 20:40:24,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:24,046 INFO L478 AbstractCegarLoop]: Abstraction has 317 states and 404 transitions. [2022-04-06 20:40:24,046 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:24,046 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 404 transitions. [2022-04-06 20:40:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:40:24,046 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:24,046 INFO L499 BasicCegarLoop]: trace histogram [44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:24,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:24,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-04-06 20:40:24,262 INFO L403 AbstractCegarLoop]: === Iteration 226 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:24,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:24,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1734772815, now seen corresponding path program 441 times [2022-04-06 20:40:24,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:24,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1925577743] [2022-04-06 20:40:24,263 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:24,263 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:24,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1734772815, now seen corresponding path program 442 times [2022-04-06 20:40:24,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:24,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253360706] [2022-04-06 20:40:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:24,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:24,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 991 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:40:24,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:24,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253360706] [2022-04-06 20:40:24,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253360706] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:24,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612856566] [2022-04-06 20:40:24,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:24,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:24,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:24,890 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:24,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-04-06 20:40:24,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:24,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:24,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 20:40:24,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 991 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:40:25,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 991 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:40:27,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612856566] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:27,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:27,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-04-06 20:40:27,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:27,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1925577743] [2022-04-06 20:40:27,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1925577743] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:27,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:27,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:40:27,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139726391] [2022-04-06 20:40:27,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:27,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:40:27,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:27,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:40:27,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2224, Invalid=7282, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:40:27,157 INFO L87 Difference]: Start difference. First operand 317 states and 404 transitions. Second operand has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:30,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:30,670 INFO L93 Difference]: Finished difference Result 523 states and 776 transitions. [2022-04-06 20:40:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:40:30,670 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 20:40:30,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:30,671 INFO L225 Difference]: With dead ends: 523 [2022-04-06 20:40:30,671 INFO L226 Difference]: Without dead ends: 515 [2022-04-06 20:40:30,672 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4588, Invalid=16582, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 20:40:30,672 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 243 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 9623 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 9810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 9623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:30,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 327 Invalid, 9810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 9623 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 20:40:30,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-04-06 20:40:30,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 323. [2022-04-06 20:40:30,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 318 states have (on average 1.2830188679245282) internal successors, (408), 318 states have internal predecessors, (408), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:30,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 412 transitions. [2022-04-06 20:40:30,845 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 412 transitions. Word has length 61 [2022-04-06 20:40:30,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:30,845 INFO L478 AbstractCegarLoop]: Abstraction has 323 states and 412 transitions. [2022-04-06 20:40:30,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:30,845 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 412 transitions. [2022-04-06 20:40:30,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:40:30,845 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:30,845 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:30,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:31,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2022-04-06 20:40:31,060 INFO L403 AbstractCegarLoop]: === Iteration 227 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:31,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:31,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1436705971, now seen corresponding path program 443 times [2022-04-06 20:40:31,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:31,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [172759896] [2022-04-06 20:40:31,060 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:31,060 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:31,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1436705971, now seen corresponding path program 444 times [2022-04-06 20:40:31,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:31,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698259224] [2022-04-06 20:40:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:31,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:31,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:40:31,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:31,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698259224] [2022-04-06 20:40:31,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698259224] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:31,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332442494] [2022-04-06 20:40:31,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:31,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:31,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:31,400 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:31,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-04-06 20:40:33,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:40:33,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:33,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 20:40:33,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 71 proven. 292 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:40:34,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:40:34,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332442494] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:34,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:34,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28, 21] total 31 [2022-04-06 20:40:34,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:34,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [172759896] [2022-04-06 20:40:34,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [172759896] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:34,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:34,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:40:34,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697770676] [2022-04-06 20:40:34,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:34,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:40:34,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:34,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:40:34,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:40:34,138 INFO L87 Difference]: Start difference. First operand 323 states and 412 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:36,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:36,619 INFO L93 Difference]: Finished difference Result 1367 states and 1851 transitions. [2022-04-06 20:40:36,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:40:36,619 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 20:40:36,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:36,620 INFO L225 Difference]: With dead ends: 1367 [2022-04-06 20:40:36,620 INFO L226 Difference]: Without dead ends: 1345 [2022-04-06 20:40:36,621 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=2072, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:40:36,621 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 59 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:36,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 156 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1662 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:40:36,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-04-06 20:40:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 327. [2022-04-06 20:40:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 322 states have (on average 1.2857142857142858) internal successors, (414), 322 states have internal predecessors, (414), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:36,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 418 transitions. [2022-04-06 20:40:36,800 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 418 transitions. Word has length 62 [2022-04-06 20:40:36,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:36,800 INFO L478 AbstractCegarLoop]: Abstraction has 327 states and 418 transitions. [2022-04-06 20:40:36,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:36,800 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 418 transitions. [2022-04-06 20:40:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:40:36,800 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:36,800 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:36,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:37,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:37,004 INFO L403 AbstractCegarLoop]: === Iteration 228 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:37,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1997764479, now seen corresponding path program 445 times [2022-04-06 20:40:37,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:37,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [500221877] [2022-04-06 20:40:37,005 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:37,005 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:37,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1997764479, now seen corresponding path program 446 times [2022-04-06 20:40:37,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:37,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456848184] [2022-04-06 20:40:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:37,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:37,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 258 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:40:37,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:37,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456848184] [2022-04-06 20:40:37,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456848184] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:37,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773747415] [2022-04-06 20:40:37,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:37,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:37,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:37,547 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:37,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-04-06 20:40:37,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:37,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:37,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-06 20:40:37,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 258 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:40:38,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-04-06 20:40:39,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773747415] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:39,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:39,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 32] total 81 [2022-04-06 20:40:39,179 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:39,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [500221877] [2022-04-06 20:40:39,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [500221877] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:39,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:39,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:40:39,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700784343] [2022-04-06 20:40:39,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:39,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:40:39,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:39,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:40:39,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=5803, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:40:39,180 INFO L87 Difference]: Start difference. First operand 327 states and 418 transitions. Second operand has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:40,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:40,796 INFO L93 Difference]: Finished difference Result 370 states and 461 transitions. [2022-04-06 20:40:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:40:40,796 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 20:40:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:40,797 INFO L225 Difference]: With dead ends: 370 [2022-04-06 20:40:40,797 INFO L226 Difference]: Without dead ends: 347 [2022-04-06 20:40:40,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2958 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1410, Invalid=14846, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 20:40:40,798 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:40,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 150 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:40:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-04-06 20:40:40,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 328. [2022-04-06 20:40:40,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 323 states have (on average 1.284829721362229) internal successors, (415), 323 states have internal predecessors, (415), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 419 transitions. [2022-04-06 20:40:40,984 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 419 transitions. Word has length 62 [2022-04-06 20:40:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:40,984 INFO L478 AbstractCegarLoop]: Abstraction has 328 states and 419 transitions. [2022-04-06 20:40:40,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:40,984 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 419 transitions. [2022-04-06 20:40:40,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:40:40,985 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:40,985 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:41,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-04-06 20:40:41,194 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:41,194 INFO L403 AbstractCegarLoop]: === Iteration 229 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:41,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:41,195 INFO L85 PathProgramCache]: Analyzing trace with hash -591334067, now seen corresponding path program 447 times [2022-04-06 20:40:41,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:41,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [177099052] [2022-04-06 20:40:41,195 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:41,195 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:41,195 INFO L85 PathProgramCache]: Analyzing trace with hash -591334067, now seen corresponding path program 448 times [2022-04-06 20:40:41,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:41,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837737390] [2022-04-06 20:40:41,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:41,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:41,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 249 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:40:41,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:41,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837737390] [2022-04-06 20:40:41,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837737390] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:41,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009958252] [2022-04-06 20:40:41,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:41,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:41,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:41,778 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:41,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-04-06 20:40:41,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:41,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:41,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:40:41,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 249 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:40:41,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 249 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:40:42,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009958252] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:42,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:42,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 20:40:42,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:42,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [177099052] [2022-04-06 20:40:42,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [177099052] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:42,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:42,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:40:42,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296214907] [2022-04-06 20:40:42,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:42,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:40:42,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:42,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:40:42,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3894, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:40:42,977 INFO L87 Difference]: Start difference. First operand 328 states and 419 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:44,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:44,757 INFO L93 Difference]: Finished difference Result 373 states and 464 transitions. [2022-04-06 20:40:44,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:40:44,757 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 20:40:44,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:44,758 INFO L225 Difference]: With dead ends: 373 [2022-04-06 20:40:44,758 INFO L226 Difference]: Without dead ends: 349 [2022-04-06 20:40:44,758 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2481, Invalid=12525, Unknown=0, NotChecked=0, Total=15006 [2022-04-06 20:40:44,759 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:44,759 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 142 Invalid, 2474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2355 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:40:44,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-04-06 20:40:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 329. [2022-04-06 20:40:44,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 324 states have (on average 1.2839506172839505) internal successors, (416), 324 states have internal predecessors, (416), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 420 transitions. [2022-04-06 20:40:44,937 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 420 transitions. Word has length 62 [2022-04-06 20:40:44,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:44,937 INFO L478 AbstractCegarLoop]: Abstraction has 329 states and 420 transitions. [2022-04-06 20:40:44,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 420 transitions. [2022-04-06 20:40:44,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:40:44,938 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:44,938 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:44,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-04-06 20:40:45,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-04-06 20:40:45,140 INFO L403 AbstractCegarLoop]: === Iteration 230 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:45,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:45,140 INFO L85 PathProgramCache]: Analyzing trace with hash -688790145, now seen corresponding path program 449 times [2022-04-06 20:40:45,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:45,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [98550833] [2022-04-06 20:40:45,141 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:45,141 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:45,141 INFO L85 PathProgramCache]: Analyzing trace with hash -688790145, now seen corresponding path program 450 times [2022-04-06 20:40:45,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:45,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441446579] [2022-04-06 20:40:45,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:45,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:45,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:40:45,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:45,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441446579] [2022-04-06 20:40:45,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441446579] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:45,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429169919] [2022-04-06 20:40:45,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:45,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:45,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:45,518 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:45,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-04-06 20:40:47,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 20:40:47,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:47,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:40:47,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:40:47,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:40:48,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429169919] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:48,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:48,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:40:48,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:48,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [98550833] [2022-04-06 20:40:48,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [98550833] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:48,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:48,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:40:48,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806468097] [2022-04-06 20:40:48,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:48,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:40:48,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:48,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:40:48,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=3633, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:40:48,720 INFO L87 Difference]: Start difference. First operand 329 states and 420 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:50,252 INFO L93 Difference]: Finished difference Result 376 states and 467 transitions. [2022-04-06 20:40:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:40:50,252 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 20:40:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:50,252 INFO L225 Difference]: With dead ends: 376 [2022-04-06 20:40:50,252 INFO L226 Difference]: Without dead ends: 351 [2022-04-06 20:40:50,253 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2588, Invalid=12664, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:40:50,253 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2473 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:50,253 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 144 Invalid, 2601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2473 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:40:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-04-06 20:40:50,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 330. [2022-04-06 20:40:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 325 states have (on average 1.283076923076923) internal successors, (417), 325 states have internal predecessors, (417), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 421 transitions. [2022-04-06 20:40:50,432 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 421 transitions. Word has length 62 [2022-04-06 20:40:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:50,432 INFO L478 AbstractCegarLoop]: Abstraction has 330 states and 421 transitions. [2022-04-06 20:40:50,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 421 transitions. [2022-04-06 20:40:50,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:40:50,432 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:50,432 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:50,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:50,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:50,637 INFO L403 AbstractCegarLoop]: === Iteration 231 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:50,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:50,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1508425549, now seen corresponding path program 451 times [2022-04-06 20:40:50,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:50,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1121418387] [2022-04-06 20:40:50,638 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:50,638 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:50,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1508425549, now seen corresponding path program 452 times [2022-04-06 20:40:50,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:50,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844329870] [2022-04-06 20:40:50,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:50,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:51,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:40:51,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:51,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844329870] [2022-04-06 20:40:51,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844329870] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:51,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029062669] [2022-04-06 20:40:51,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:51,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:51,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:51,076 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:51,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-04-06 20:40:51,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:51,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:51,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:40:51,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:40:51,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:40:52,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029062669] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:52,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:52,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:40:52,053 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:52,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1121418387] [2022-04-06 20:40:52,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1121418387] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:52,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:52,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:40:52,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007370937] [2022-04-06 20:40:52,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:52,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:40:52,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:52,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:40:52,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=656, Invalid=3376, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:40:52,054 INFO L87 Difference]: Start difference. First operand 330 states and 421 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:53,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:53,891 INFO L93 Difference]: Finished difference Result 379 states and 470 transitions. [2022-04-06 20:40:53,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 20:40:53,892 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 20:40:53,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:53,893 INFO L225 Difference]: With dead ends: 379 [2022-04-06 20:40:53,893 INFO L226 Difference]: Without dead ends: 353 [2022-04-06 20:40:53,894 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2492, Invalid=11788, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 20:40:53,894 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2507 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:53,894 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 151 Invalid, 2638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2507 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:40:53,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-04-06 20:40:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 331. [2022-04-06 20:40:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 326 states have (on average 1.2822085889570551) internal successors, (418), 326 states have internal predecessors, (418), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 422 transitions. [2022-04-06 20:40:54,088 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 422 transitions. Word has length 62 [2022-04-06 20:40:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:54,088 INFO L478 AbstractCegarLoop]: Abstraction has 331 states and 422 transitions. [2022-04-06 20:40:54,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:54,088 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 422 transitions. [2022-04-06 20:40:54,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:40:54,089 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:54,089 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:54,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-04-06 20:40:54,292 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:54,292 INFO L403 AbstractCegarLoop]: === Iteration 232 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:54,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1486611327, now seen corresponding path program 453 times [2022-04-06 20:40:54,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:54,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [142902324] [2022-04-06 20:40:54,293 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:54,293 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1486611327, now seen corresponding path program 454 times [2022-04-06 20:40:54,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:54,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466982882] [2022-04-06 20:40:54,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:54,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:54,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:40:54,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:54,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466982882] [2022-04-06 20:40:54,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466982882] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:54,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189370226] [2022-04-06 20:40:54,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:54,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:54,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:54,713 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:54,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-04-06 20:40:54,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:54,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:54,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:40:54,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:40:54,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:40:55,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189370226] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:55,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:55,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 20:40:55,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:55,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [142902324] [2022-04-06 20:40:55,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [142902324] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:55,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:55,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:40:55,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518770957] [2022-04-06 20:40:55,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:55,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:40:55,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:40:55,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=3121, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:40:55,922 INFO L87 Difference]: Start difference. First operand 331 states and 422 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:57,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:57,353 INFO L93 Difference]: Finished difference Result 382 states and 473 transitions. [2022-04-06 20:40:57,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:40:57,353 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 20:40:57,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:57,354 INFO L225 Difference]: With dead ends: 382 [2022-04-06 20:40:57,354 INFO L226 Difference]: Without dead ends: 355 [2022-04-06 20:40:57,354 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2213, Invalid=9997, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 20:40:57,355 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2616 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:57,355 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 173 Invalid, 2727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2616 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:40:57,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-04-06 20:40:57,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 332. [2022-04-06 20:40:57,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 327 states have (on average 1.2813455657492354) internal successors, (419), 327 states have internal predecessors, (419), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 423 transitions. [2022-04-06 20:40:57,546 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 423 transitions. Word has length 62 [2022-04-06 20:40:57,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:57,546 INFO L478 AbstractCegarLoop]: Abstraction has 332 states and 423 transitions. [2022-04-06 20:40:57,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 423 transitions. [2022-04-06 20:40:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:40:57,547 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:57,547 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:57,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:57,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:57,759 INFO L403 AbstractCegarLoop]: === Iteration 233 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1383397709, now seen corresponding path program 455 times [2022-04-06 20:40:57,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:57,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [746520842] [2022-04-06 20:40:57,760 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:57,760 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1383397709, now seen corresponding path program 456 times [2022-04-06 20:40:57,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:57,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968231201] [2022-04-06 20:40:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:57,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:58,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 263 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:40:58,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:58,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968231201] [2022-04-06 20:40:58,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968231201] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:58,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204432322] [2022-04-06 20:40:58,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:58,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:58,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:58,046 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:58,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-04-06 20:41:05,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 20:41:05,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:05,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:41:05,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 90 proven. 20 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2022-04-06 20:41:05,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 106 proven. 20 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-04-06 20:41:06,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204432322] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:06,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:06,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12, 12] total 50 [2022-04-06 20:41:06,005 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:06,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [746520842] [2022-04-06 20:41:06,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [746520842] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:06,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:06,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:41:06,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538044485] [2022-04-06 20:41:06,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:06,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:41:06,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:06,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:41:06,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2236, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:41:06,006 INFO L87 Difference]: Start difference. First operand 332 states and 423 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:07,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:07,521 INFO L93 Difference]: Finished difference Result 385 states and 476 transitions. [2022-04-06 20:41:07,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:41:07,521 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 20:41:07,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:07,522 INFO L225 Difference]: With dead ends: 385 [2022-04-06 20:41:07,522 INFO L226 Difference]: Without dead ends: 357 [2022-04-06 20:41:07,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=538, Invalid=7118, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:41:07,522 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 58 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 2540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:07,522 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 172 Invalid, 2540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:41:07,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-04-06 20:41:07,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 333. [2022-04-06 20:41:07,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.2804878048780488) internal successors, (420), 328 states have internal predecessors, (420), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 424 transitions. [2022-04-06 20:41:07,712 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 424 transitions. Word has length 62 [2022-04-06 20:41:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:07,712 INFO L478 AbstractCegarLoop]: Abstraction has 333 states and 424 transitions. [2022-04-06 20:41:07,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:07,712 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 424 transitions. [2022-04-06 20:41:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:41:07,713 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:07,713 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:07,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:07,918 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-04-06 20:41:07,918 INFO L403 AbstractCegarLoop]: === Iteration 234 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:07,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:07,918 INFO L85 PathProgramCache]: Analyzing trace with hash -135171713, now seen corresponding path program 457 times [2022-04-06 20:41:07,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:07,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [616264867] [2022-04-06 20:41:07,919 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:07,919 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:07,919 INFO L85 PathProgramCache]: Analyzing trace with hash -135171713, now seen corresponding path program 458 times [2022-04-06 20:41:07,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:07,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177350346] [2022-04-06 20:41:07,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:07,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:08,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 279 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:41:08,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:08,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177350346] [2022-04-06 20:41:08,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177350346] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:08,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179569194] [2022-04-06 20:41:08,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:08,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:08,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:08,344 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:08,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-04-06 20:41:08,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:08,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:41:08,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 279 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:41:08,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 279 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:41:09,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179569194] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:09,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:09,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:41:09,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:09,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [616264867] [2022-04-06 20:41:09,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [616264867] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:09,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:09,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:41:09,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620176897] [2022-04-06 20:41:09,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:09,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:41:09,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:09,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:41:09,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=2605, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:41:09,481 INFO L87 Difference]: Start difference. First operand 333 states and 424 transitions. Second operand has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:10,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:10,690 INFO L93 Difference]: Finished difference Result 388 states and 479 transitions. [2022-04-06 20:41:10,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:41:10,690 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 20:41:10,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:10,690 INFO L225 Difference]: With dead ends: 388 [2022-04-06 20:41:10,690 INFO L226 Difference]: Without dead ends: 359 [2022-04-06 20:41:10,691 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1574, Invalid=6082, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:41:10,691 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 67 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:10,691 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 165 Invalid, 2335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:41:10,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-04-06 20:41:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 334. [2022-04-06 20:41:10,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 329 states have (on average 1.2796352583586625) internal successors, (421), 329 states have internal predecessors, (421), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 425 transitions. [2022-04-06 20:41:10,880 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 425 transitions. Word has length 62 [2022-04-06 20:41:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:10,880 INFO L478 AbstractCegarLoop]: Abstraction has 334 states and 425 transitions. [2022-04-06 20:41:10,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:10,880 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 425 transitions. [2022-04-06 20:41:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:41:10,881 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:10,881 INFO L499 BasicCegarLoop]: trace histogram [45, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:10,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:11,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-04-06 20:41:11,095 INFO L403 AbstractCegarLoop]: === Iteration 235 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:11,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:11,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1694798542, now seen corresponding path program 459 times [2022-04-06 20:41:11,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:11,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [961015764] [2022-04-06 20:41:11,096 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:11,096 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:11,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1694798542, now seen corresponding path program 460 times [2022-04-06 20:41:11,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:11,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402849955] [2022-04-06 20:41:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:11,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:11,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1039 backedges. 0 proven. 1036 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:41:11,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:11,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402849955] [2022-04-06 20:41:11,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402849955] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:11,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721507676] [2022-04-06 20:41:11,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:11,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:11,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:11,802 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:11,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-04-06 20:41:11,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:11,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:11,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 20:41:11,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1039 backedges. 0 proven. 1036 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:41:11,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1039 backedges. 0 proven. 1036 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:41:14,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721507676] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:14,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:14,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-04-06 20:41:14,435 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:14,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [961015764] [2022-04-06 20:41:14,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [961015764] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:14,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:14,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 20:41:14,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251758340] [2022-04-06 20:41:14,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:14,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 20:41:14,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:14,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 20:41:14,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2319, Invalid=7581, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:41:14,436 INFO L87 Difference]: Start difference. First operand 334 states and 425 transitions. Second operand has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:18,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:18,036 INFO L93 Difference]: Finished difference Result 559 states and 833 transitions. [2022-04-06 20:41:18,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:41:18,036 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 20:41:18,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:18,037 INFO L225 Difference]: With dead ends: 559 [2022-04-06 20:41:18,037 INFO L226 Difference]: Without dead ends: 551 [2022-04-06 20:41:18,038 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4781, Invalid=17271, Unknown=0, NotChecked=0, Total=22052 [2022-04-06 20:41:18,038 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 251 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 10113 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 10304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 10113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:18,038 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 335 Invalid, 10304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 10113 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 20:41:18,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-04-06 20:41:18,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 340. [2022-04-06 20:41:18,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 335 states have (on average 1.2805970149253731) internal successors, (429), 335 states have internal predecessors, (429), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 433 transitions. [2022-04-06 20:41:18,235 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 433 transitions. Word has length 62 [2022-04-06 20:41:18,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:18,235 INFO L478 AbstractCegarLoop]: Abstraction has 340 states and 433 transitions. [2022-04-06 20:41:18,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:18,236 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 433 transitions. [2022-04-06 20:41:18,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:41:18,236 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:18,236 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:18,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-04-06 20:41:18,456 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-04-06 20:41:18,456 INFO L403 AbstractCegarLoop]: === Iteration 236 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:18,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:18,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1660739887, now seen corresponding path program 461 times [2022-04-06 20:41:18,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:18,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [341368447] [2022-04-06 20:41:18,457 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:18,457 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:18,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1660739887, now seen corresponding path program 462 times [2022-04-06 20:41:18,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:18,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164660735] [2022-04-06 20:41:18,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:18,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:18,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:41:18,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:18,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164660735] [2022-04-06 20:41:18,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164660735] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:18,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315485706] [2022-04-06 20:41:18,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:18,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:18,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:18,917 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:18,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-04-06 20:41:21,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 20:41:21,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:21,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 102 conjunts are in the unsatisfiable core [2022-04-06 20:41:21,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:41:22,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:41:23,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315485706] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:23,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:23,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 88 [2022-04-06 20:41:23,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:23,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [341368447] [2022-04-06 20:41:23,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [341368447] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:23,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:23,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:41:23,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225457760] [2022-04-06 20:41:23,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:23,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:41:23,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:23,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:41:23,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1074, Invalid=6582, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:41:23,879 INFO L87 Difference]: Start difference. First operand 340 states and 433 transitions. Second operand has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:25,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:25,090 INFO L93 Difference]: Finished difference Result 362 states and 454 transitions. [2022-04-06 20:41:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:41:25,090 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 20:41:25,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:25,090 INFO L225 Difference]: With dead ends: 362 [2022-04-06 20:41:25,091 INFO L226 Difference]: Without dead ends: 321 [2022-04-06 20:41:25,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2094, Invalid=12668, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 20:41:25,091 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:25,091 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 186 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:41:25,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-04-06 20:41:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2022-04-06 20:41:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 316 states have (on average 1.2911392405063291) internal successors, (408), 316 states have internal predecessors, (408), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 412 transitions. [2022-04-06 20:41:25,271 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 412 transitions. Word has length 63 [2022-04-06 20:41:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:25,271 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 412 transitions. [2022-04-06 20:41:25,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 412 transitions. [2022-04-06 20:41:25,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:41:25,271 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:25,271 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:25,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-04-06 20:41:25,476 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-04-06 20:41:25,476 INFO L403 AbstractCegarLoop]: === Iteration 237 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:25,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1595398081, now seen corresponding path program 463 times [2022-04-06 20:41:25,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:25,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [504395627] [2022-04-06 20:41:25,477 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:25,477 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:25,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1595398081, now seen corresponding path program 464 times [2022-04-06 20:41:25,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:25,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254480048] [2022-04-06 20:41:25,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:25,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:25,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:41:25,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:25,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254480048] [2022-04-06 20:41:25,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254480048] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:25,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797835468] [2022-04-06 20:41:25,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:25,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:25,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:25,842 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:25,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-04-06 20:41:25,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:25,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:25,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-06 20:41:25,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:41:26,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 32 proven. 240 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-04-06 20:41:27,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797835468] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:27,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:27,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 34] total 85 [2022-04-06 20:41:27,440 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:27,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [504395627] [2022-04-06 20:41:27,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [504395627] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:27,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:27,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:41:27,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205171684] [2022-04-06 20:41:27,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:27,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:41:27,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:27,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:41:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=6392, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:41:27,441 INFO L87 Difference]: Start difference. First operand 321 states and 412 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:28,729 INFO L93 Difference]: Finished difference Result 364 states and 455 transitions. [2022-04-06 20:41:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:41:28,729 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 20:41:28,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:28,729 INFO L225 Difference]: With dead ends: 364 [2022-04-06 20:41:28,729 INFO L226 Difference]: Without dead ends: 341 [2022-04-06 20:41:28,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2459 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1222, Invalid=12820, Unknown=0, NotChecked=0, Total=14042 [2022-04-06 20:41:28,730 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:28,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 113 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:41:28,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-04-06 20:41:28,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 322. [2022-04-06 20:41:28,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 317 states have (on average 1.2902208201892744) internal successors, (409), 317 states have internal predecessors, (409), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:28,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 413 transitions. [2022-04-06 20:41:28,908 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 413 transitions. Word has length 63 [2022-04-06 20:41:28,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:28,908 INFO L478 AbstractCegarLoop]: Abstraction has 322 states and 413 transitions. [2022-04-06 20:41:28,908 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:28,908 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 413 transitions. [2022-04-06 20:41:28,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:41:28,909 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:28,909 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:28,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-04-06 20:41:29,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:29,110 INFO L403 AbstractCegarLoop]: === Iteration 238 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:29,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:29,110 INFO L85 PathProgramCache]: Analyzing trace with hash -105355409, now seen corresponding path program 465 times [2022-04-06 20:41:29,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:29,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1804293762] [2022-04-06 20:41:29,111 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:29,111 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:29,111 INFO L85 PathProgramCache]: Analyzing trace with hash -105355409, now seen corresponding path program 466 times [2022-04-06 20:41:29,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:29,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653135278] [2022-04-06 20:41:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:29,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:29,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:41:29,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:29,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653135278] [2022-04-06 20:41:29,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653135278] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:29,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012227271] [2022-04-06 20:41:29,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:29,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:29,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:29,539 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:29,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-04-06 20:41:29,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:29,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:29,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:41:29,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:41:29,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:41:30,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012227271] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:30,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:30,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 20:41:30,691 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:30,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1804293762] [2022-04-06 20:41:30,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1804293762] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:30,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:30,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:41:30,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647379491] [2022-04-06 20:41:30,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:30,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:41:30,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:30,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:41:30,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=690, Invalid=4140, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:41:30,692 INFO L87 Difference]: Start difference. First operand 322 states and 413 transitions. Second operand has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:32,111 INFO L93 Difference]: Finished difference Result 367 states and 458 transitions. [2022-04-06 20:41:32,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:41:32,112 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 20:41:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:32,112 INFO L225 Difference]: With dead ends: 367 [2022-04-06 20:41:32,112 INFO L226 Difference]: Without dead ends: 343 [2022-04-06 20:41:32,113 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2182, Invalid=11158, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 20:41:32,113 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:32,113 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 185 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:41:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-04-06 20:41:32,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 323. [2022-04-06 20:41:32,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 318 states have (on average 1.2893081761006289) internal successors, (410), 318 states have internal predecessors, (410), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:32,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 414 transitions. [2022-04-06 20:41:32,292 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 414 transitions. Word has length 63 [2022-04-06 20:41:32,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:32,292 INFO L478 AbstractCegarLoop]: Abstraction has 323 states and 414 transitions. [2022-04-06 20:41:32,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:32,292 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 414 transitions. [2022-04-06 20:41:32,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:41:32,292 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:32,292 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:32,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:32,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-04-06 20:41:32,508 INFO L403 AbstractCegarLoop]: === Iteration 239 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:32,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:32,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1452794367, now seen corresponding path program 467 times [2022-04-06 20:41:32,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:32,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [154478273] [2022-04-06 20:41:32,509 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:32,509 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:32,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1452794367, now seen corresponding path program 468 times [2022-04-06 20:41:32,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:32,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066586564] [2022-04-06 20:41:32,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:32,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:33,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:41:33,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:33,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066586564] [2022-04-06 20:41:33,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066586564] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:33,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350760996] [2022-04-06 20:41:33,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:33,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:33,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:33,014 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:33,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-04-06 20:41:35,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 20:41:35,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:35,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:41:35,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:41:35,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:41:36,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350760996] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:36,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:36,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 20:41:36,945 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:36,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [154478273] [2022-04-06 20:41:36,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [154478273] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:36,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:36,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:41:36,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724976468] [2022-04-06 20:41:36,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:36,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:41:36,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:36,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:41:36,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=3875, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:41:36,946 INFO L87 Difference]: Start difference. First operand 323 states and 414 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:38,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:38,870 INFO L93 Difference]: Finished difference Result 370 states and 461 transitions. [2022-04-06 20:41:38,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:41:38,871 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 20:41:38,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:38,871 INFO L225 Difference]: With dead ends: 370 [2022-04-06 20:41:38,871 INFO L226 Difference]: Without dead ends: 345 [2022-04-06 20:41:38,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2442, Invalid=12078, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:41:38,872 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2423 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:38,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 152 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2423 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:41:38,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-04-06 20:41:39,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 324. [2022-04-06 20:41:39,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 319 states have (on average 1.2884012539184952) internal successors, (411), 319 states have internal predecessors, (411), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 415 transitions. [2022-04-06 20:41:39,054 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 415 transitions. Word has length 63 [2022-04-06 20:41:39,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:39,054 INFO L478 AbstractCegarLoop]: Abstraction has 324 states and 415 transitions. [2022-04-06 20:41:39,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:39,054 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 415 transitions. [2022-04-06 20:41:39,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:41:39,055 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:39,055 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:39,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-04-06 20:41:39,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-04-06 20:41:39,259 INFO L403 AbstractCegarLoop]: === Iteration 240 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:39,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:39,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1071017391, now seen corresponding path program 469 times [2022-04-06 20:41:39,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:39,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [275222420] [2022-04-06 20:41:39,260 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:39,260 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:39,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1071017391, now seen corresponding path program 470 times [2022-04-06 20:41:39,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:39,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437875816] [2022-04-06 20:41:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:39,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:39,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:41:39,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:39,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437875816] [2022-04-06 20:41:39,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437875816] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:39,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340608160] [2022-04-06 20:41:39,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:39,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:39,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:39,610 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:39,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-04-06 20:41:39,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:39,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:39,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:41:39,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:41:39,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:41:40,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340608160] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:40,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:40,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:41:40,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:40,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [275222420] [2022-04-06 20:41:40,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [275222420] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:40,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:40,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:41:40,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452426102] [2022-04-06 20:41:40,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:40,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:41:40,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:40,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:41:40,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=3610, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:41:40,651 INFO L87 Difference]: Start difference. First operand 324 states and 415 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:42,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:42,170 INFO L93 Difference]: Finished difference Result 373 states and 464 transitions. [2022-04-06 20:41:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:41:42,170 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 20:41:42,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:42,171 INFO L225 Difference]: With dead ends: 373 [2022-04-06 20:41:42,171 INFO L226 Difference]: Without dead ends: 347 [2022-04-06 20:41:42,171 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1791 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2513, Invalid=12007, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:41:42,171 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2818 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:42,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 179 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2818 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:41:42,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-04-06 20:41:42,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 325. [2022-04-06 20:41:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 320 states have (on average 1.2875) internal successors, (412), 320 states have internal predecessors, (412), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:42,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 416 transitions. [2022-04-06 20:41:42,355 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 416 transitions. Word has length 63 [2022-04-06 20:41:42,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:42,355 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 416 transitions. [2022-04-06 20:41:42,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:42,355 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 416 transitions. [2022-04-06 20:41:42,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:41:42,356 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:42,356 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:42,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:42,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-04-06 20:41:42,565 INFO L403 AbstractCegarLoop]: === Iteration 241 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:42,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1250747457, now seen corresponding path program 471 times [2022-04-06 20:41:42,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:42,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [591717888] [2022-04-06 20:41:42,566 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:42,566 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:42,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1250747457, now seen corresponding path program 472 times [2022-04-06 20:41:42,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:42,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442625014] [2022-04-06 20:41:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:42,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:43,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:41:43,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:43,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442625014] [2022-04-06 20:41:43,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442625014] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:43,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353020134] [2022-04-06 20:41:43,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:43,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:43,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:43,057 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:43,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-04-06 20:41:43,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:43,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:43,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:41:43,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:41:43,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:41:44,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353020134] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:44,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:44,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:41:44,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:44,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [591717888] [2022-04-06 20:41:44,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [591717888] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:44,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:44,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:41:44,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709158848] [2022-04-06 20:41:44,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:44,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:41:44,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:44,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:41:44,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=3351, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:41:44,031 INFO L87 Difference]: Start difference. First operand 325 states and 416 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:45,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:45,518 INFO L93 Difference]: Finished difference Result 376 states and 467 transitions. [2022-04-06 20:41:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:41:45,518 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 20:41:45,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:45,519 INFO L225 Difference]: With dead ends: 376 [2022-04-06 20:41:45,519 INFO L226 Difference]: Without dead ends: 349 [2022-04-06 20:41:45,519 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2375, Invalid=10965, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 20:41:45,519 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2669 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:45,519 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 171 Invalid, 2787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2669 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:41:45,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-04-06 20:41:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 326. [2022-04-06 20:41:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 321 states have (on average 1.2866043613707165) internal successors, (413), 321 states have internal predecessors, (413), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:45,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 417 transitions. [2022-04-06 20:41:45,699 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 417 transitions. Word has length 63 [2022-04-06 20:41:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:45,699 INFO L478 AbstractCegarLoop]: Abstraction has 326 states and 417 transitions. [2022-04-06 20:41:45,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 417 transitions. [2022-04-06 20:41:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:41:45,700 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:45,700 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:45,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:45,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:45,911 INFO L403 AbstractCegarLoop]: === Iteration 242 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:45,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:45,911 INFO L85 PathProgramCache]: Analyzing trace with hash 372962287, now seen corresponding path program 473 times [2022-04-06 20:41:45,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:45,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1310596099] [2022-04-06 20:41:45,912 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:45,912 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:45,912 INFO L85 PathProgramCache]: Analyzing trace with hash 372962287, now seen corresponding path program 474 times [2022-04-06 20:41:45,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:45,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000065489] [2022-04-06 20:41:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:45,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:46,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 268 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:41:46,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:46,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000065489] [2022-04-06 20:41:46,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000065489] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:46,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335425263] [2022-04-06 20:41:46,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:46,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:46,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:46,415 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:46,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-04-06 20:41:48,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 20:41:48,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:48,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:41:48,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 268 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:41:48,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 268 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:41:49,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335425263] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:49,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:49,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 20:41:49,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:49,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1310596099] [2022-04-06 20:41:49,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1310596099] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:49,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:49,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:41:49,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665801620] [2022-04-06 20:41:49,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:49,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:41:49,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:49,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:41:49,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=3090, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:41:49,598 INFO L87 Difference]: Start difference. First operand 326 states and 417 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:51,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:51,144 INFO L93 Difference]: Finished difference Result 379 states and 470 transitions. [2022-04-06 20:41:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:41:51,145 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 20:41:51,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:51,145 INFO L225 Difference]: With dead ends: 379 [2022-04-06 20:41:51,145 INFO L226 Difference]: Without dead ends: 351 [2022-04-06 20:41:51,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2072, Invalid=9058, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:41:51,146 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:51,146 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 173 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2540 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:41:51,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-04-06 20:41:51,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 327. [2022-04-06 20:41:51,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 322 states have (on average 1.2857142857142858) internal successors, (414), 322 states have internal predecessors, (414), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:51,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 418 transitions. [2022-04-06 20:41:51,329 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 418 transitions. Word has length 63 [2022-04-06 20:41:51,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:51,329 INFO L478 AbstractCegarLoop]: Abstraction has 327 states and 418 transitions. [2022-04-06 20:41:51,329 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:51,329 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 418 transitions. [2022-04-06 20:41:51,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:41:51,329 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:51,329 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:51,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:51,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:51,534 INFO L403 AbstractCegarLoop]: === Iteration 243 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:51,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:51,534 INFO L85 PathProgramCache]: Analyzing trace with hash -258615937, now seen corresponding path program 475 times [2022-04-06 20:41:51,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:51,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [416437899] [2022-04-06 20:41:51,535 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:51,535 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:51,535 INFO L85 PathProgramCache]: Analyzing trace with hash -258615937, now seen corresponding path program 476 times [2022-04-06 20:41:51,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:51,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308419207] [2022-04-06 20:41:51,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:51,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:51,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:41:51,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:51,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308419207] [2022-04-06 20:41:51,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308419207] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:51,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85706053] [2022-04-06 20:41:51,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:51,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:51,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:51,959 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:51,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-04-06 20:41:52,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:52,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:52,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:41:52,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:41:52,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:41:53,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85706053] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:53,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:53,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:41:53,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:53,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [416437899] [2022-04-06 20:41:53,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [416437899] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:53,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:53,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:41:53,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776196029] [2022-04-06 20:41:53,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:53,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:41:53,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:53,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:41:53,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=713, Invalid=2827, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:41:53,245 INFO L87 Difference]: Start difference. First operand 327 states and 418 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:54,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:54,364 INFO L93 Difference]: Finished difference Result 382 states and 473 transitions. [2022-04-06 20:41:54,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:41:54,381 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 20:41:54,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:54,381 INFO L225 Difference]: With dead ends: 382 [2022-04-06 20:41:54,381 INFO L226 Difference]: Without dead ends: 353 [2022-04-06 20:41:54,381 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1733, Invalid=7009, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:41:54,382 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 58 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2201 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:54,382 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 158 Invalid, 2277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2201 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:41:54,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-04-06 20:41:54,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 328. [2022-04-06 20:41:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 323 states have (on average 1.284829721362229) internal successors, (415), 323 states have internal predecessors, (415), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:54,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 419 transitions. [2022-04-06 20:41:54,567 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 419 transitions. Word has length 63 [2022-04-06 20:41:54,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:54,567 INFO L478 AbstractCegarLoop]: Abstraction has 328 states and 419 transitions. [2022-04-06 20:41:54,567 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:54,567 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 419 transitions. [2022-04-06 20:41:54,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:41:54,568 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:54,568 INFO L499 BasicCegarLoop]: trace histogram [46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:54,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:54,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2022-04-06 20:41:54,784 INFO L403 AbstractCegarLoop]: === Iteration 244 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:54,784 INFO L85 PathProgramCache]: Analyzing trace with hash 455596079, now seen corresponding path program 477 times [2022-04-06 20:41:54,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:54,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1628096245] [2022-04-06 20:41:54,784 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:54,785 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:54,785 INFO L85 PathProgramCache]: Analyzing trace with hash 455596079, now seen corresponding path program 478 times [2022-04-06 20:41:54,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:54,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204404211] [2022-04-06 20:41:54,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:54,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:55,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 0 proven. 1082 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:41:55,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:55,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204404211] [2022-04-06 20:41:55,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204404211] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:55,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648024001] [2022-04-06 20:41:55,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:55,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:55,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:55,497 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:55,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-04-06 20:41:55,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:55,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:55,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 99 conjunts are in the unsatisfiable core [2022-04-06 20:41:55,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 0 proven. 1082 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:41:55,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 0 proven. 1082 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:41:58,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648024001] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:58,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:58,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-04-06 20:41:58,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:58,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1628096245] [2022-04-06 20:41:58,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1628096245] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:58,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:58,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:41:58,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17378883] [2022-04-06 20:41:58,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:58,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:41:58,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:58,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:41:58,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2416, Invalid=7886, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:41:58,265 INFO L87 Difference]: Start difference. First operand 328 states and 419 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:02,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:02,096 INFO L93 Difference]: Finished difference Result 554 states and 829 transitions. [2022-04-06 20:42:02,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:42:02,096 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 20:42:02,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:02,096 INFO L225 Difference]: With dead ends: 554 [2022-04-06 20:42:02,097 INFO L226 Difference]: Without dead ends: 546 [2022-04-06 20:42:02,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4978, Invalid=17974, Unknown=0, NotChecked=0, Total=22952 [2022-04-06 20:42:02,097 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 251 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 10426 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 10621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 10426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:02,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 340 Invalid, 10621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 10426 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 20:42:02,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-04-06 20:42:02,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 334. [2022-04-06 20:42:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 329 states have (on average 1.2857142857142858) internal successors, (423), 329 states have internal predecessors, (423), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 427 transitions. [2022-04-06 20:42:02,299 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 427 transitions. Word has length 63 [2022-04-06 20:42:02,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:02,299 INFO L478 AbstractCegarLoop]: Abstraction has 334 states and 427 transitions. [2022-04-06 20:42:02,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 427 transitions. [2022-04-06 20:42:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 20:42:02,299 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:02,299 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:02,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-04-06 20:42:02,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-04-06 20:42:02,515 INFO L403 AbstractCegarLoop]: === Iteration 245 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:02,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:02,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1314287745, now seen corresponding path program 479 times [2022-04-06 20:42:02,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:02,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1395110616] [2022-04-06 20:42:02,516 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:02,516 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:02,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1314287745, now seen corresponding path program 480 times [2022-04-06 20:42:02,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:02,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992730474] [2022-04-06 20:42:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:02,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:03,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:42:03,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:03,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992730474] [2022-04-06 20:42:03,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992730474] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:03,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068813084] [2022-04-06 20:42:03,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:03,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:03,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:03,118 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:03,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-04-06 20:42:05,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 20:42:05,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:05,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 104 conjunts are in the unsatisfiable core [2022-04-06 20:42:05,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:42:06,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:42:07,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068813084] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:07,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:07,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 36] total 89 [2022-04-06 20:42:07,645 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:07,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1395110616] [2022-04-06 20:42:07,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1395110616] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:07,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:07,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:42:07,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714900908] [2022-04-06 20:42:07,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:07,645 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:42:07,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:07,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:42:07,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=823, Invalid=7009, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:42:07,646 INFO L87 Difference]: Start difference. First operand 334 states and 427 transitions. Second operand has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:09,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:09,183 INFO L93 Difference]: Finished difference Result 377 states and 470 transitions. [2022-04-06 20:42:09,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:42:09,183 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-04-06 20:42:09,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:09,183 INFO L225 Difference]: With dead ends: 377 [2022-04-06 20:42:09,183 INFO L226 Difference]: Without dead ends: 354 [2022-04-06 20:42:09,184 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2722 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1337, Invalid=13915, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:42:09,184 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1978 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:09,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 168 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1978 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:42:09,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-04-06 20:42:09,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 335. [2022-04-06 20:42:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.284848484848485) internal successors, (424), 330 states have internal predecessors, (424), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 428 transitions. [2022-04-06 20:42:09,390 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 428 transitions. Word has length 64 [2022-04-06 20:42:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:09,390 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 428 transitions. [2022-04-06 20:42:09,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:09,390 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 428 transitions. [2022-04-06 20:42:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 20:42:09,390 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:09,390 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:09,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-04-06 20:42:09,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:09,595 INFO L403 AbstractCegarLoop]: === Iteration 246 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:09,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:09,595 INFO L85 PathProgramCache]: Analyzing trace with hash 2075081101, now seen corresponding path program 481 times [2022-04-06 20:42:09,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:09,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [666737841] [2022-04-06 20:42:09,596 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:09,596 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:09,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2075081101, now seen corresponding path program 482 times [2022-04-06 20:42:09,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:09,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221898188] [2022-04-06 20:42:09,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:09,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:09,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:42:09,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:09,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221898188] [2022-04-06 20:42:09,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221898188] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:09,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409501643] [2022-04-06 20:42:09,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:09,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:09,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:09,964 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:09,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-04-06 20:42:10,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:10,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:10,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:42:10,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:42:10,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:42:11,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409501643] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:11,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:11,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 20:42:11,166 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:11,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [666737841] [2022-04-06 20:42:11,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [666737841] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:11,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:11,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:42:11,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258903615] [2022-04-06 20:42:11,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:11,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:42:11,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:11,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:42:11,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=720, Invalid=4392, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:42:11,167 INFO L87 Difference]: Start difference. First operand 335 states and 428 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:12,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:12,944 INFO L93 Difference]: Finished difference Result 380 states and 473 transitions. [2022-04-06 20:42:12,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:42:12,944 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-04-06 20:42:12,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:12,945 INFO L225 Difference]: With dead ends: 380 [2022-04-06 20:42:12,945 INFO L226 Difference]: Without dead ends: 356 [2022-04-06 20:42:12,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2314, Invalid=11966, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 20:42:12,946 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2461 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 2561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:12,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 170 Invalid, 2561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:42:12,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-04-06 20:42:13,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 336. [2022-04-06 20:42:13,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 331 states have (on average 1.283987915407855) internal successors, (425), 331 states have internal predecessors, (425), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 429 transitions. [2022-04-06 20:42:13,140 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 429 transitions. Word has length 64 [2022-04-06 20:42:13,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:13,140 INFO L478 AbstractCegarLoop]: Abstraction has 336 states and 429 transitions. [2022-04-06 20:42:13,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 429 transitions. [2022-04-06 20:42:13,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 20:42:13,140 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:13,141 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:13,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:13,350 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-04-06 20:42:13,351 INFO L403 AbstractCegarLoop]: === Iteration 247 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:13,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:13,351 INFO L85 PathProgramCache]: Analyzing trace with hash -877562497, now seen corresponding path program 483 times [2022-04-06 20:42:13,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:13,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [117077951] [2022-04-06 20:42:13,352 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:13,352 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:13,352 INFO L85 PathProgramCache]: Analyzing trace with hash -877562497, now seen corresponding path program 484 times [2022-04-06 20:42:13,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:13,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198789884] [2022-04-06 20:42:13,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:13,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:13,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 268 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:42:13,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:13,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198789884] [2022-04-06 20:42:13,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198789884] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:13,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085814899] [2022-04-06 20:42:13,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:13,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:13,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:13,979 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:13,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-04-06 20:42:14,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:14,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:14,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:42:14,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 268 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:42:14,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 268 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:42:15,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085814899] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:15,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:15,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 20:42:15,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:15,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [117077951] [2022-04-06 20:42:15,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [117077951] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:15,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:15,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:42:15,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874241142] [2022-04-06 20:42:15,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:15,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:42:15,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:15,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:42:15,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=4123, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:42:15,333 INFO L87 Difference]: Start difference. First operand 336 states and 429 transitions. Second operand has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:16,961 INFO L93 Difference]: Finished difference Result 383 states and 476 transitions. [2022-04-06 20:42:16,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 20:42:16,961 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-04-06 20:42:16,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:16,962 INFO L225 Difference]: With dead ends: 383 [2022-04-06 20:42:16,962 INFO L226 Difference]: Without dead ends: 358 [2022-04-06 20:42:16,963 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2611, Invalid=13139, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 20:42:16,963 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 2670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:16,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 152 Invalid, 2670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:42:16,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-04-06 20:42:17,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 337. [2022-04-06 20:42:17,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 332 states have (on average 1.283132530120482) internal successors, (426), 332 states have internal predecessors, (426), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:17,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 430 transitions. [2022-04-06 20:42:17,163 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 430 transitions. Word has length 64 [2022-04-06 20:42:17,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:17,164 INFO L478 AbstractCegarLoop]: Abstraction has 337 states and 430 transitions. [2022-04-06 20:42:17,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:17,164 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 430 transitions. [2022-04-06 20:42:17,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 20:42:17,164 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:17,164 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:17,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:17,381 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-04-06 20:42:17,381 INFO L403 AbstractCegarLoop]: === Iteration 248 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:17,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:17,381 INFO L85 PathProgramCache]: Analyzing trace with hash 396266381, now seen corresponding path program 485 times [2022-04-06 20:42:17,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:17,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [818648856] [2022-04-06 20:42:17,382 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:17,382 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:17,382 INFO L85 PathProgramCache]: Analyzing trace with hash 396266381, now seen corresponding path program 486 times [2022-04-06 20:42:17,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:17,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551348893] [2022-04-06 20:42:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:17,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:17,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:42:17,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:17,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551348893] [2022-04-06 20:42:17,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551348893] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:17,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519496494] [2022-04-06 20:42:17,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:17,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:17,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:17,750 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:17,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-04-06 20:42:21,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 20:42:21,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:21,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:42:21,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:42:21,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:42:22,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519496494] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:22,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:22,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 20:42:22,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:22,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [818648856] [2022-04-06 20:42:22,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [818648856] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:22,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:22,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:42:22,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271455490] [2022-04-06 20:42:22,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:22,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:42:22,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:22,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:42:22,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=3852, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:42:22,854 INFO L87 Difference]: Start difference. First operand 337 states and 430 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:24,532 INFO L93 Difference]: Finished difference Result 386 states and 479 transitions. [2022-04-06 20:42:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 20:42:24,532 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-04-06 20:42:24,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:24,532 INFO L225 Difference]: With dead ends: 386 [2022-04-06 20:42:24,532 INFO L226 Difference]: Without dead ends: 360 [2022-04-06 20:42:24,533 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2726, Invalid=13276, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 20:42:24,533 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3031 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 3160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:24,533 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 184 Invalid, 3160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3031 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:42:24,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-04-06 20:42:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 338. [2022-04-06 20:42:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 333 states have (on average 1.2822822822822824) internal successors, (427), 333 states have internal predecessors, (427), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:24,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 431 transitions. [2022-04-06 20:42:24,725 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 431 transitions. Word has length 64 [2022-04-06 20:42:24,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:24,725 INFO L478 AbstractCegarLoop]: Abstraction has 338 states and 431 transitions. [2022-04-06 20:42:24,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:24,725 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 431 transitions. [2022-04-06 20:42:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 20:42:24,725 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:24,725 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:24,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:24,930 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2022-04-06 20:42:24,931 INFO L403 AbstractCegarLoop]: === Iteration 249 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:24,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:24,931 INFO L85 PathProgramCache]: Analyzing trace with hash -209523841, now seen corresponding path program 487 times [2022-04-06 20:42:24,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:24,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1255656173] [2022-04-06 20:42:24,932 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:24,932 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:24,932 INFO L85 PathProgramCache]: Analyzing trace with hash -209523841, now seen corresponding path program 488 times [2022-04-06 20:42:24,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:24,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585114778] [2022-04-06 20:42:24,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:24,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:25,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:42:25,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:25,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585114778] [2022-04-06 20:42:25,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585114778] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:25,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745181843] [2022-04-06 20:42:25,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:25,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:25,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:25,267 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:25,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-04-06 20:42:25,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:25,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:25,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:42:25,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:42:25,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:42:26,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745181843] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:26,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:26,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:42:26,277 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:26,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1255656173] [2022-04-06 20:42:26,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1255656173] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:26,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:26,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:42:26,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697109099] [2022-04-06 20:42:26,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:26,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:42:26,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:42:26,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=3587, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:42:26,278 INFO L87 Difference]: Start difference. First operand 338 states and 431 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:27,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:27,940 INFO L93 Difference]: Finished difference Result 389 states and 482 transitions. [2022-04-06 20:42:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:42:27,940 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-04-06 20:42:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:27,940 INFO L225 Difference]: With dead ends: 389 [2022-04-06 20:42:27,940 INFO L226 Difference]: Without dead ends: 362 [2022-04-06 20:42:27,941 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2621, Invalid=12385, Unknown=0, NotChecked=0, Total=15006 [2022-04-06 20:42:27,941 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2970 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 3099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:27,941 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 181 Invalid, 3099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2970 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:42:27,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-04-06 20:42:28,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 339. [2022-04-06 20:42:28,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 334 states have (on average 1.281437125748503) internal successors, (428), 334 states have internal predecessors, (428), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:28,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 432 transitions. [2022-04-06 20:42:28,132 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 432 transitions. Word has length 64 [2022-04-06 20:42:28,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:28,132 INFO L478 AbstractCegarLoop]: Abstraction has 339 states and 432 transitions. [2022-04-06 20:42:28,133 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:28,133 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 432 transitions. [2022-04-06 20:42:28,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 20:42:28,133 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:28,133 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:28,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-04-06 20:42:28,337 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:28,337 INFO L403 AbstractCegarLoop]: === Iteration 250 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:28,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:28,337 INFO L85 PathProgramCache]: Analyzing trace with hash -885764723, now seen corresponding path program 489 times [2022-04-06 20:42:28,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:28,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [738442516] [2022-04-06 20:42:28,338 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:28,338 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:28,338 INFO L85 PathProgramCache]: Analyzing trace with hash -885764723, now seen corresponding path program 490 times [2022-04-06 20:42:28,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:28,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572378529] [2022-04-06 20:42:28,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:28,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:28,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:42:28,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:28,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572378529] [2022-04-06 20:42:28,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572378529] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:28,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961578048] [2022-04-06 20:42:28,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:28,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:28,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:28,808 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:28,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-04-06 20:42:28,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:28,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:28,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:42:28,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:42:28,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:42:29,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961578048] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:29,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:29,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:42:29,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:29,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [738442516] [2022-04-06 20:42:29,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [738442516] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:29,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:29,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:42:29,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791182750] [2022-04-06 20:42:29,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:29,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:42:29,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:29,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:42:29,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=3322, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:42:29,858 INFO L87 Difference]: Start difference. First operand 339 states and 432 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:31,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:31,610 INFO L93 Difference]: Finished difference Result 392 states and 485 transitions. [2022-04-06 20:42:31,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:42:31,610 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-04-06 20:42:31,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:31,611 INFO L225 Difference]: With dead ends: 392 [2022-04-06 20:42:31,611 INFO L226 Difference]: Without dead ends: 364 [2022-04-06 20:42:31,611 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2338, Invalid=10544, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 20:42:31,611 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2634 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:31,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 168 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2634 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:42:31,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-04-06 20:42:31,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 340. [2022-04-06 20:42:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 335 states have (on average 1.2805970149253731) internal successors, (429), 335 states have internal predecessors, (429), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:31,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 433 transitions. [2022-04-06 20:42:31,810 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 433 transitions. Word has length 64 [2022-04-06 20:42:31,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:31,810 INFO L478 AbstractCegarLoop]: Abstraction has 340 states and 433 transitions. [2022-04-06 20:42:31,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:31,810 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 433 transitions. [2022-04-06 20:42:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 20:42:31,810 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:31,810 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:31,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:32,026 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:32,027 INFO L403 AbstractCegarLoop]: === Iteration 251 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:32,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:32,027 INFO L85 PathProgramCache]: Analyzing trace with hash 209580415, now seen corresponding path program 491 times [2022-04-06 20:42:32,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:32,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1022983821] [2022-04-06 20:42:32,027 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:32,028 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:32,028 INFO L85 PathProgramCache]: Analyzing trace with hash 209580415, now seen corresponding path program 492 times [2022-04-06 20:42:32,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:32,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631487815] [2022-04-06 20:42:32,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:32,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:32,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:42:32,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:32,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631487815] [2022-04-06 20:42:32,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631487815] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:32,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72984657] [2022-04-06 20:42:32,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:32,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:32,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:32,341 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:32,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-04-06 20:42:35,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 20:42:35,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:35,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:42:35,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 95 proven. 20 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2022-04-06 20:42:36,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 95 proven. 20 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2022-04-06 20:42:36,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72984657] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:36,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:36,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12, 12] total 47 [2022-04-06 20:42:36,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:36,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1022983821] [2022-04-06 20:42:36,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1022983821] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:36,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:36,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:42:36,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751259694] [2022-04-06 20:42:36,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:36,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:42:36,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:36,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:42:36,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2022, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:42:36,290 INFO L87 Difference]: Start difference. First operand 340 states and 433 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:37,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:37,868 INFO L93 Difference]: Finished difference Result 395 states and 488 transitions. [2022-04-06 20:42:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:42:37,869 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-04-06 20:42:37,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:37,869 INFO L225 Difference]: With dead ends: 395 [2022-04-06 20:42:37,869 INFO L226 Difference]: Without dead ends: 366 [2022-04-06 20:42:37,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=441, Invalid=6869, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:42:37,870 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 58 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:37,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 167 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2451 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:42:37,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-04-06 20:42:38,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 341. [2022-04-06 20:42:38,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 336 states have (on average 1.2797619047619047) internal successors, (430), 336 states have internal predecessors, (430), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:38,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 434 transitions. [2022-04-06 20:42:38,069 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 434 transitions. Word has length 64 [2022-04-06 20:42:38,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:38,069 INFO L478 AbstractCegarLoop]: Abstraction has 341 states and 434 transitions. [2022-04-06 20:42:38,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:38,069 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 434 transitions. [2022-04-06 20:42:38,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 20:42:38,069 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:38,070 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:38,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-04-06 20:42:38,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:38,275 INFO L403 AbstractCegarLoop]: === Iteration 252 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:38,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:38,275 INFO L85 PathProgramCache]: Analyzing trace with hash 378568589, now seen corresponding path program 493 times [2022-04-06 20:42:38,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:38,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1985864748] [2022-04-06 20:42:38,276 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:38,276 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:38,276 INFO L85 PathProgramCache]: Analyzing trace with hash 378568589, now seen corresponding path program 494 times [2022-04-06 20:42:38,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:38,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846620189] [2022-04-06 20:42:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:38,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:38,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 303 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:42:38,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:38,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846620189] [2022-04-06 20:42:38,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846620189] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:38,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518829812] [2022-04-06 20:42:38,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:38,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:38,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:38,697 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:38,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-04-06 20:42:38,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:38,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:38,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:42:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 303 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:42:38,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 303 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:42:39,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518829812] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:39,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:39,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:42:39,845 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:39,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1985864748] [2022-04-06 20:42:39,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1985864748] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:39,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:39,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:42:39,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966253446] [2022-04-06 20:42:39,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:39,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:42:39,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:39,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:42:39,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=2786, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:42:39,846 INFO L87 Difference]: Start difference. First operand 341 states and 434 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:41,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:41,050 INFO L93 Difference]: Finished difference Result 398 states and 491 transitions. [2022-04-06 20:42:41,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:42:41,050 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-04-06 20:42:41,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:41,051 INFO L225 Difference]: With dead ends: 398 [2022-04-06 20:42:41,051 INFO L226 Difference]: Without dead ends: 368 [2022-04-06 20:42:41,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1686, Invalid=6504, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:42:41,051 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 67 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 2479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:41,051 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 170 Invalid, 2479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2411 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:42:41,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-04-06 20:42:41,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 342. [2022-04-06 20:42:41,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 337 states have (on average 1.2789317507418398) internal successors, (431), 337 states have internal predecessors, (431), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:41,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 435 transitions. [2022-04-06 20:42:41,252 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 435 transitions. Word has length 64 [2022-04-06 20:42:41,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:41,252 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 435 transitions. [2022-04-06 20:42:41,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:41,252 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 435 transitions. [2022-04-06 20:42:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 20:42:41,252 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:41,252 INFO L499 BasicCegarLoop]: trace histogram [47, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:41,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:41,469 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:41,469 INFO L403 AbstractCegarLoop]: === Iteration 253 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:41,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:41,469 INFO L85 PathProgramCache]: Analyzing trace with hash 695025390, now seen corresponding path program 495 times [2022-04-06 20:42:41,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:41,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [92588189] [2022-04-06 20:42:41,470 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:41,470 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:41,470 INFO L85 PathProgramCache]: Analyzing trace with hash 695025390, now seen corresponding path program 496 times [2022-04-06 20:42:41,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:41,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840346774] [2022-04-06 20:42:41,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:41,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:42,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 0 proven. 1129 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:42:42,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:42,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840346774] [2022-04-06 20:42:42,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840346774] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:42,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339186178] [2022-04-06 20:42:42,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:42,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:42,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:42,437 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:42,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-04-06 20:42:42,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:42,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:42,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 20:42:42,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 0 proven. 1129 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:42:42,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 0 proven. 1129 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:42:45,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339186178] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:45,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:45,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-04-06 20:42:45,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:45,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [92588189] [2022-04-06 20:42:45,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [92588189] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:45,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:45,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:42:45,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740417388] [2022-04-06 20:42:45,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:45,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:42:45,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:45,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:42:45,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2515, Invalid=8197, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:42:45,279 INFO L87 Difference]: Start difference. First operand 342 states and 435 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:48,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:48,939 INFO L93 Difference]: Finished difference Result 569 states and 847 transitions. [2022-04-06 20:42:48,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:42:48,939 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-04-06 20:42:48,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:48,940 INFO L225 Difference]: With dead ends: 569 [2022-04-06 20:42:48,940 INFO L226 Difference]: Without dead ends: 561 [2022-04-06 20:42:48,941 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5179, Invalid=18691, Unknown=0, NotChecked=0, Total=23870 [2022-04-06 20:42:48,941 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 259 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 10936 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 11135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 10936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:48,941 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 348 Invalid, 11135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 10936 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 20:42:48,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-04-06 20:42:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 348. [2022-04-06 20:42:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 343 states have (on average 1.2798833819241981) internal successors, (439), 343 states have internal predecessors, (439), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 443 transitions. [2022-04-06 20:42:49,163 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 443 transitions. Word has length 64 [2022-04-06 20:42:49,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:49,163 INFO L478 AbstractCegarLoop]: Abstraction has 348 states and 443 transitions. [2022-04-06 20:42:49,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 443 transitions. [2022-04-06 20:42:49,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:42:49,165 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:49,165 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:49,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-04-06 20:42:49,380 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:49,380 INFO L403 AbstractCegarLoop]: === Iteration 254 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:49,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:49,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1189801921, now seen corresponding path program 497 times [2022-04-06 20:42:49,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:49,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1909073229] [2022-04-06 20:42:49,381 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:49,381 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:49,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1189801921, now seen corresponding path program 498 times [2022-04-06 20:42:49,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:49,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614107576] [2022-04-06 20:42:49,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:49,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:49,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:42:49,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:49,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614107576] [2022-04-06 20:42:49,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614107576] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:49,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062329274] [2022-04-06 20:42:49,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:49,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:49,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:49,662 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:49,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-04-06 20:42:52,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 20:42:52,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:52,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 20:42:52,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:42:52,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:42:52,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062329274] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:52,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:52,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 25 [2022-04-06 20:42:52,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:52,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1909073229] [2022-04-06 20:42:52,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1909073229] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:52,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:52,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:42:52,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399779533] [2022-04-06 20:42:52,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:52,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:42:52,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:52,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:42:52,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:42:52,309 INFO L87 Difference]: Start difference. First operand 348 states and 443 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:55,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:55,158 INFO L93 Difference]: Finished difference Result 1529 states and 2073 transitions. [2022-04-06 20:42:55,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:42:55,159 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 20:42:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:55,161 INFO L225 Difference]: With dead ends: 1529 [2022-04-06 20:42:55,161 INFO L226 Difference]: Without dead ends: 1506 [2022-04-06 20:42:55,161 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=1849, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:42:55,161 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 62 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:55,162 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 164 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:42:55,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-04-06 20:42:55,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 352. [2022-04-06 20:42:55,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 347 states have (on average 1.282420749279539) internal successors, (445), 347 states have internal predecessors, (445), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:55,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 449 transitions. [2022-04-06 20:42:55,397 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 449 transitions. Word has length 65 [2022-04-06 20:42:55,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:55,397 INFO L478 AbstractCegarLoop]: Abstraction has 352 states and 449 transitions. [2022-04-06 20:42:55,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:55,397 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 449 transitions. [2022-04-06 20:42:55,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:42:55,398 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:55,398 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:55,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:55,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:55,604 INFO L403 AbstractCegarLoop]: === Iteration 255 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:55,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:55,605 INFO L85 PathProgramCache]: Analyzing trace with hash 949136175, now seen corresponding path program 499 times [2022-04-06 20:42:55,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:55,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [992725911] [2022-04-06 20:42:55,605 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:55,605 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:55,605 INFO L85 PathProgramCache]: Analyzing trace with hash 949136175, now seen corresponding path program 500 times [2022-04-06 20:42:55,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:55,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176002700] [2022-04-06 20:42:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:55,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:56,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 291 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:42:56,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:56,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176002700] [2022-04-06 20:42:56,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176002700] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:56,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983722268] [2022-04-06 20:42:56,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:56,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:56,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:56,048 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:56,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-04-06 20:42:56,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:56,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:56,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 102 conjunts are in the unsatisfiable core [2022-04-06 20:42:56,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 291 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:42:56,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-04-06 20:42:58,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983722268] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:58,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:58,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 34] total 86 [2022-04-06 20:42:58,101 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:58,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [992725911] [2022-04-06 20:42:58,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [992725911] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:58,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:58,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:42:58,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844290537] [2022-04-06 20:42:58,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:58,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:42:58,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:58,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:42:58,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=753, Invalid=6557, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:42:58,103 INFO L87 Difference]: Start difference. First operand 352 states and 449 transitions. Second operand has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:00,136 INFO L93 Difference]: Finished difference Result 397 states and 494 transitions. [2022-04-06 20:43:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:43:00,137 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 20:43:00,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:00,137 INFO L225 Difference]: With dead ends: 397 [2022-04-06 20:43:00,137 INFO L226 Difference]: Without dead ends: 373 [2022-04-06 20:43:00,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3363 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1566, Invalid=16794, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 20:43:00,138 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 2811 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:00,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 195 Invalid, 2915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2811 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:43:00,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-04-06 20:43:00,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 353. [2022-04-06 20:43:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 348 states have (on average 1.2816091954022988) internal successors, (446), 348 states have internal predecessors, (446), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 450 transitions. [2022-04-06 20:43:00,351 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 450 transitions. Word has length 65 [2022-04-06 20:43:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:00,351 INFO L478 AbstractCegarLoop]: Abstraction has 353 states and 450 transitions. [2022-04-06 20:43:00,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:00,354 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 450 transitions. [2022-04-06 20:43:00,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:43:00,356 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:00,356 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:00,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:00,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:00,571 INFO L403 AbstractCegarLoop]: === Iteration 256 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:00,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:00,572 INFO L85 PathProgramCache]: Analyzing trace with hash -104181249, now seen corresponding path program 501 times [2022-04-06 20:43:00,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:00,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [901075158] [2022-04-06 20:43:00,572 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:00,572 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:00,573 INFO L85 PathProgramCache]: Analyzing trace with hash -104181249, now seen corresponding path program 502 times [2022-04-06 20:43:00,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:00,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87036653] [2022-04-06 20:43:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:00,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:01,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:43:01,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:01,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87036653] [2022-04-06 20:43:01,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87036653] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:01,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690057578] [2022-04-06 20:43:01,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:01,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:01,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:01,142 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:01,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-04-06 20:43:01,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:01,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:01,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:43:01,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:43:01,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:43:02,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690057578] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:02,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:02,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 20:43:02,508 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:02,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [901075158] [2022-04-06 20:43:02,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [901075158] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:02,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:02,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:43:02,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740645433] [2022-04-06 20:43:02,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:02,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:43:02,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:02,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:43:02,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=735, Invalid=4377, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:43:02,522 INFO L87 Difference]: Start difference. First operand 353 states and 450 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:04,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:04,364 INFO L93 Difference]: Finished difference Result 400 states and 497 transitions. [2022-04-06 20:43:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 20:43:04,369 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 20:43:04,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:04,373 INFO L225 Difference]: With dead ends: 400 [2022-04-06 20:43:04,373 INFO L226 Difference]: Without dead ends: 375 [2022-04-06 20:43:04,375 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2208 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2788, Invalid=14242, Unknown=0, NotChecked=0, Total=17030 [2022-04-06 20:43:04,375 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3066 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 3191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:04,375 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 187 Invalid, 3191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3066 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:43:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-04-06 20:43:04,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 354. [2022-04-06 20:43:04,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 349 states have (on average 1.2808022922636104) internal successors, (447), 349 states have internal predecessors, (447), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:04,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 451 transitions. [2022-04-06 20:43:04,601 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 451 transitions. Word has length 65 [2022-04-06 20:43:04,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:04,602 INFO L478 AbstractCegarLoop]: Abstraction has 354 states and 451 transitions. [2022-04-06 20:43:04,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:04,602 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 451 transitions. [2022-04-06 20:43:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:43:04,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:04,602 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:04,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:04,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-04-06 20:43:04,821 INFO L403 AbstractCegarLoop]: === Iteration 257 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:04,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:04,821 INFO L85 PathProgramCache]: Analyzing trace with hash 953821551, now seen corresponding path program 503 times [2022-04-06 20:43:04,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:04,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1565763860] [2022-04-06 20:43:04,825 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:04,825 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:04,825 INFO L85 PathProgramCache]: Analyzing trace with hash 953821551, now seen corresponding path program 504 times [2022-04-06 20:43:04,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:04,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644650267] [2022-04-06 20:43:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:04,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:05,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:43:05,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:05,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644650267] [2022-04-06 20:43:05,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644650267] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:05,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499346189] [2022-04-06 20:43:05,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:05,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:05,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:05,223 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:05,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-04-06 20:43:11,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 20:43:11,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:11,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 70 conjunts are in the unsatisfiable core [2022-04-06 20:43:11,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:11,656 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:43:11,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:43:12,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499346189] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:12,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:12,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 20:43:12,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:12,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1565763860] [2022-04-06 20:43:12,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1565763860] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:12,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:12,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:43:12,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043324671] [2022-04-06 20:43:12,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:12,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:43:12,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:12,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:43:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=4102, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:43:12,789 INFO L87 Difference]: Start difference. First operand 354 states and 451 transitions. Second operand has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:14,647 INFO L93 Difference]: Finished difference Result 403 states and 500 transitions. [2022-04-06 20:43:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:43:14,647 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 20:43:14,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:14,647 INFO L225 Difference]: With dead ends: 403 [2022-04-06 20:43:14,648 INFO L226 Difference]: Without dead ends: 377 [2022-04-06 20:43:14,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2935, Invalid=14621, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:43:14,648 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3252 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 3389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 3252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:14,648 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 189 Invalid, 3389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 3252 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:43:14,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-04-06 20:43:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 355. [2022-04-06 20:43:14,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 350 states have (on average 1.28) internal successors, (448), 350 states have internal predecessors, (448), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:14,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 452 transitions. [2022-04-06 20:43:14,868 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 452 transitions. Word has length 65 [2022-04-06 20:43:14,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:14,868 INFO L478 AbstractCegarLoop]: Abstraction has 355 states and 452 transitions. [2022-04-06 20:43:14,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 452 transitions. [2022-04-06 20:43:14,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:43:14,868 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:14,869 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:14,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-04-06 20:43:15,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-04-06 20:43:15,074 INFO L403 AbstractCegarLoop]: === Iteration 258 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:15,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2003637183, now seen corresponding path program 505 times [2022-04-06 20:43:15,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:15,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1236384785] [2022-04-06 20:43:15,086 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:15,086 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:15,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2003637183, now seen corresponding path program 506 times [2022-04-06 20:43:15,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:15,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577039752] [2022-04-06 20:43:15,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:15,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:15,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:43:15,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:15,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577039752] [2022-04-06 20:43:15,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577039752] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:15,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047515966] [2022-04-06 20:43:15,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:43:15,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:15,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:15,431 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:15,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-04-06 20:43:15,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:43:15,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:15,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:43:15,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:43:15,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:43:16,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047515966] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:16,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:16,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 20:43:16,473 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:16,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1236384785] [2022-04-06 20:43:16,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1236384785] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:16,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:16,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:43:16,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852579374] [2022-04-06 20:43:16,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:16,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:43:16,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:16,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:43:16,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=727, Invalid=3829, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:43:16,474 INFO L87 Difference]: Start difference. First operand 355 states and 452 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:18,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:18,127 INFO L93 Difference]: Finished difference Result 406 states and 503 transitions. [2022-04-06 20:43:18,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 20:43:18,127 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 20:43:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:18,127 INFO L225 Difference]: With dead ends: 406 [2022-04-06 20:43:18,127 INFO L226 Difference]: Without dead ends: 379 [2022-04-06 20:43:18,128 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2879, Invalid=13891, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:43:18,128 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2777 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:18,128 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 151 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2777 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:43:18,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-04-06 20:43:18,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 356. [2022-04-06 20:43:18,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 351 states have (on average 1.2792022792022792) internal successors, (449), 351 states have internal predecessors, (449), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 453 transitions. [2022-04-06 20:43:18,347 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 453 transitions. Word has length 65 [2022-04-06 20:43:18,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:18,347 INFO L478 AbstractCegarLoop]: Abstraction has 356 states and 453 transitions. [2022-04-06 20:43:18,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:18,347 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 453 transitions. [2022-04-06 20:43:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:43:18,347 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:18,347 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:18,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-04-06 20:43:18,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-04-06 20:43:18,563 INFO L403 AbstractCegarLoop]: === Iteration 259 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:18,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:18,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1251596369, now seen corresponding path program 507 times [2022-04-06 20:43:18,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:18,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1846400764] [2022-04-06 20:43:18,564 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:18,564 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:18,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1251596369, now seen corresponding path program 508 times [2022-04-06 20:43:18,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:18,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456558471] [2022-04-06 20:43:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:18,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:19,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:43:19,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:19,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456558471] [2022-04-06 20:43:19,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456558471] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:19,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540614809] [2022-04-06 20:43:19,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:19,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:19,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:19,026 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:19,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-04-06 20:43:19,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:19,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:19,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:43:19,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:43:19,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:43:20,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540614809] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:20,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:20,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:43:20,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:20,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1846400764] [2022-04-06 20:43:20,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1846400764] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:20,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:20,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:43:20,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684117561] [2022-04-06 20:43:20,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:20,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:43:20,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:20,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:43:20,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=3560, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:43:20,019 INFO L87 Difference]: Start difference. First operand 356 states and 453 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:22,152 INFO L93 Difference]: Finished difference Result 409 states and 506 transitions. [2022-04-06 20:43:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 20:43:22,152 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 20:43:22,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:22,153 INFO L225 Difference]: With dead ends: 409 [2022-04-06 20:43:22,153 INFO L226 Difference]: Without dead ends: 381 [2022-04-06 20:43:22,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2618, Invalid=12144, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 20:43:22,153 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:22,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 178 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:43:22,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-04-06 20:43:22,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 357. [2022-04-06 20:43:22,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 352 states have (on average 1.2784090909090908) internal successors, (450), 352 states have internal predecessors, (450), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:22,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 454 transitions. [2022-04-06 20:43:22,368 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 454 transitions. Word has length 65 [2022-04-06 20:43:22,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:22,369 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 454 transitions. [2022-04-06 20:43:22,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:22,369 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 454 transitions. [2022-04-06 20:43:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:43:22,369 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:22,369 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:22,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2022-04-06 20:43:22,582 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:22,583 INFO L403 AbstractCegarLoop]: === Iteration 260 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:22,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:22,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1838765439, now seen corresponding path program 509 times [2022-04-06 20:43:22,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:22,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [98352708] [2022-04-06 20:43:22,584 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:22,584 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:22,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1838765439, now seen corresponding path program 510 times [2022-04-06 20:43:22,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:22,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29606502] [2022-04-06 20:43:22,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:22,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:22,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 291 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:43:22,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:22,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29606502] [2022-04-06 20:43:22,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29606502] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:22,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096949980] [2022-04-06 20:43:22,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:22,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:22,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:22,891 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:22,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-04-06 20:43:26,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 20:43:26,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:26,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:43:26,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 291 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:43:27,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 291 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:43:27,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096949980] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:27,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:27,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:43:27,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:27,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [98352708] [2022-04-06 20:43:27,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [98352708] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:27,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:27,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:43:27,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307896097] [2022-04-06 20:43:27,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:27,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:43:27,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:27,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:43:27,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=3289, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:43:27,978 INFO L87 Difference]: Start difference. First operand 357 states and 454 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:29,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:29,455 INFO L93 Difference]: Finished difference Result 412 states and 509 transitions. [2022-04-06 20:43:29,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:43:29,455 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 20:43:29,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:29,455 INFO L225 Difference]: With dead ends: 412 [2022-04-06 20:43:29,455 INFO L226 Difference]: Without dead ends: 383 [2022-04-06 20:43:29,456 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2195, Invalid=9577, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:43:29,456 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 57 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:29,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 156 Invalid, 2540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:43:29,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-04-06 20:43:29,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 358. [2022-04-06 20:43:29,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 353 states have (on average 1.2776203966005666) internal successors, (451), 353 states have internal predecessors, (451), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:29,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 455 transitions. [2022-04-06 20:43:29,671 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 455 transitions. Word has length 65 [2022-04-06 20:43:29,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:29,671 INFO L478 AbstractCegarLoop]: Abstraction has 358 states and 455 transitions. [2022-04-06 20:43:29,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:29,671 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 455 transitions. [2022-04-06 20:43:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:43:29,671 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:29,671 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:29,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-04-06 20:43:29,876 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:29,876 INFO L403 AbstractCegarLoop]: === Iteration 261 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:29,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:29,876 INFO L85 PathProgramCache]: Analyzing trace with hash -560290321, now seen corresponding path program 511 times [2022-04-06 20:43:29,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:29,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [733776403] [2022-04-06 20:43:29,877 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:29,877 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash -560290321, now seen corresponding path program 512 times [2022-04-06 20:43:29,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:29,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013799876] [2022-04-06 20:43:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:29,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:30,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:43:30,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:30,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013799876] [2022-04-06 20:43:30,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013799876] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:30,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546932104] [2022-04-06 20:43:30,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:43:30,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:30,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:30,273 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:30,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-04-06 20:43:30,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:43:30,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:30,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:43:30,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:43:30,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:43:31,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546932104] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:31,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:31,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 20:43:31,585 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:31,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [733776403] [2022-04-06 20:43:31,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [733776403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:31,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:31,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:43:31,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273222303] [2022-04-06 20:43:31,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:31,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:43:31,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:31,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:43:31,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=766, Invalid=3016, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:43:31,586 INFO L87 Difference]: Start difference. First operand 358 states and 455 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:32,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:32,840 INFO L93 Difference]: Finished difference Result 415 states and 512 transitions. [2022-04-06 20:43:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:43:32,840 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 20:43:32,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:32,841 INFO L225 Difference]: With dead ends: 415 [2022-04-06 20:43:32,841 INFO L226 Difference]: Without dead ends: 385 [2022-04-06 20:43:32,841 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1849, Invalid=7463, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:43:32,841 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2442 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:32,841 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 166 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2442 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:43:32,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-04-06 20:43:33,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 359. [2022-04-06 20:43:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 354 states have (on average 1.2768361581920904) internal successors, (452), 354 states have internal predecessors, (452), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 456 transitions. [2022-04-06 20:43:33,066 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 456 transitions. Word has length 65 [2022-04-06 20:43:33,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:33,067 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 456 transitions. [2022-04-06 20:43:33,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:33,067 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 456 transitions. [2022-04-06 20:43:33,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:43:33,067 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:33,067 INFO L499 BasicCegarLoop]: trace histogram [48, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:33,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:33,282 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-04-06 20:43:33,282 INFO L403 AbstractCegarLoop]: === Iteration 262 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:33,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:33,283 INFO L85 PathProgramCache]: Analyzing trace with hash -472600561, now seen corresponding path program 513 times [2022-04-06 20:43:33,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:33,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [818467328] [2022-04-06 20:43:33,283 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:33,283 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:33,283 INFO L85 PathProgramCache]: Analyzing trace with hash -472600561, now seen corresponding path program 514 times [2022-04-06 20:43:33,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:33,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147135527] [2022-04-06 20:43:33,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:33,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:34,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:43:34,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:34,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147135527] [2022-04-06 20:43:34,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147135527] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:34,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713932190] [2022-04-06 20:43:34,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:34,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:34,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:34,292 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:34,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-04-06 20:43:34,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:34,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:34,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 20:43:34,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:43:34,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:43:36,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713932190] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:36,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:36,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-04-06 20:43:36,846 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:36,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [818467328] [2022-04-06 20:43:36,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [818467328] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:36,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:36,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 20:43:36,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373026555] [2022-04-06 20:43:36,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:36,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 20:43:36,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:36,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 20:43:36,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2616, Invalid=8514, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:43:36,848 INFO L87 Difference]: Start difference. First operand 359 states and 456 transitions. Second operand has 54 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 53 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:41,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:41,073 INFO L93 Difference]: Finished difference Result 606 states and 906 transitions. [2022-04-06 20:43:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:43:41,073 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 53 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 20:43:41,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:41,074 INFO L225 Difference]: With dead ends: 606 [2022-04-06 20:43:41,074 INFO L226 Difference]: Without dead ends: 598 [2022-04-06 20:43:41,075 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5384, Invalid=19422, Unknown=0, NotChecked=0, Total=24806 [2022-04-06 20:43:41,075 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 267 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 11458 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 11661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 11458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:41,075 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 356 Invalid, 11661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 11458 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 20:43:41,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-04-06 20:43:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 365. [2022-04-06 20:43:41,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 360 states have (on average 1.2777777777777777) internal successors, (460), 360 states have internal predecessors, (460), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 464 transitions. [2022-04-06 20:43:41,308 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 464 transitions. Word has length 65 [2022-04-06 20:43:41,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:41,308 INFO L478 AbstractCegarLoop]: Abstraction has 365 states and 464 transitions. [2022-04-06 20:43:41,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 53 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:41,309 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 464 transitions. [2022-04-06 20:43:41,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 20:43:41,309 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:41,309 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:41,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:41,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:41,523 INFO L403 AbstractCegarLoop]: === Iteration 263 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:41,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1625708673, now seen corresponding path program 515 times [2022-04-06 20:43:41,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:41,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [521226988] [2022-04-06 20:43:41,524 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:41,524 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:41,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1625708673, now seen corresponding path program 516 times [2022-04-06 20:43:41,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:41,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360384258] [2022-04-06 20:43:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:41,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:41,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:43:41,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:41,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360384258] [2022-04-06 20:43:41,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360384258] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:41,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887452386] [2022-04-06 20:43:41,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:41,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:41,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:41,966 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:41,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-04-06 20:43:43,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 20:43:43,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:43,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 108 conjunts are in the unsatisfiable core [2022-04-06 20:43:43,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:43:43,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:43:45,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887452386] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:45,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:45,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 93 [2022-04-06 20:43:45,277 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:45,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [521226988] [2022-04-06 20:43:45,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [521226988] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:45,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:45,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:43:45,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52047614] [2022-04-06 20:43:45,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:45,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:43:45,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:45,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:43:45,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1191, Invalid=7365, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:43:45,279 INFO L87 Difference]: Start difference. First operand 365 states and 464 transitions. Second operand has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 38 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:46,577 INFO L93 Difference]: Finished difference Result 388 states and 486 transitions. [2022-04-06 20:43:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:43:46,577 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 38 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-04-06 20:43:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:46,577 INFO L225 Difference]: With dead ends: 388 [2022-04-06 20:43:46,577 INFO L226 Difference]: Without dead ends: 345 [2022-04-06 20:43:46,578 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2325, Invalid=14187, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 20:43:46,578 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:46,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 196 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:43:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-04-06 20:43:46,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2022-04-06 20:43:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 340 states have (on average 1.2882352941176471) internal successors, (438), 340 states have internal predecessors, (438), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:46,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 442 transitions. [2022-04-06 20:43:46,783 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 442 transitions. Word has length 66 [2022-04-06 20:43:46,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:46,783 INFO L478 AbstractCegarLoop]: Abstraction has 345 states and 442 transitions. [2022-04-06 20:43:46,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 38 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:46,783 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 442 transitions. [2022-04-06 20:43:46,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 20:43:46,784 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:46,784 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:46,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:46,989 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:46,989 INFO L403 AbstractCegarLoop]: === Iteration 264 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:46,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:46,989 INFO L85 PathProgramCache]: Analyzing trace with hash 404581837, now seen corresponding path program 517 times [2022-04-06 20:43:46,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:46,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1294638141] [2022-04-06 20:43:46,990 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:46,990 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:46,990 INFO L85 PathProgramCache]: Analyzing trace with hash 404581837, now seen corresponding path program 518 times [2022-04-06 20:43:46,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:46,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150076688] [2022-04-06 20:43:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:46,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:47,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:43:47,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:47,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150076688] [2022-04-06 20:43:47,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150076688] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:47,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309439872] [2022-04-06 20:43:47,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:43:47,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:47,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:47,446 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:47,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-04-06 20:43:47,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:43:47,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:47,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 106 conjunts are in the unsatisfiable core [2022-04-06 20:43:47,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:43:47,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 34 proven. 272 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 20:43:49,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309439872] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:49,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:49,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 36] total 90 [2022-04-06 20:43:49,176 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:49,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1294638141] [2022-04-06 20:43:49,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1294638141] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:49,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:49,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:43:49,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198163882] [2022-04-06 20:43:49,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:49,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:43:49,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:49,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:43:49,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=7182, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:43:49,177 INFO L87 Difference]: Start difference. First operand 345 states and 442 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:50,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:50,704 INFO L93 Difference]: Finished difference Result 390 states and 487 transitions. [2022-04-06 20:43:50,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:43:50,704 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-04-06 20:43:50,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:50,704 INFO L225 Difference]: With dead ends: 390 [2022-04-06 20:43:50,704 INFO L226 Difference]: Without dead ends: 366 [2022-04-06 20:43:50,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1348, Invalid=14402, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 20:43:50,705 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:50,705 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 118 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1564 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:43:50,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-04-06 20:43:50,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 346. [2022-04-06 20:43:50,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 341 states have (on average 1.2873900293255132) internal successors, (439), 341 states have internal predecessors, (439), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 443 transitions. [2022-04-06 20:43:50,913 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 443 transitions. Word has length 66 [2022-04-06 20:43:50,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:50,913 INFO L478 AbstractCegarLoop]: Abstraction has 346 states and 443 transitions. [2022-04-06 20:43:50,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:50,913 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 443 transitions. [2022-04-06 20:43:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 20:43:50,913 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:50,913 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:50,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:51,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:51,115 INFO L403 AbstractCegarLoop]: === Iteration 265 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:51,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:51,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1899166337, now seen corresponding path program 519 times [2022-04-06 20:43:51,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:51,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [76015310] [2022-04-06 20:43:51,116 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:51,116 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:51,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1899166337, now seen corresponding path program 520 times [2022-04-06 20:43:51,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:51,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933002650] [2022-04-06 20:43:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:51,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:51,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 295 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:43:51,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:51,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933002650] [2022-04-06 20:43:51,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933002650] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:51,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795830906] [2022-04-06 20:43:51,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:51,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:51,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:51,622 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:51,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-04-06 20:43:51,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:51,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:51,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 20:43:51,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 295 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:43:51,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 295 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:43:53,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795830906] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:53,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:53,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-04-06 20:43:53,045 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:53,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [76015310] [2022-04-06 20:43:53,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [76015310] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:53,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:53,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:43:53,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099061667] [2022-04-06 20:43:53,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:53,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:43:53,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:53,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:43:53,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=4637, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:43:53,047 INFO L87 Difference]: Start difference. First operand 346 states and 443 transitions. Second operand has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:54,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:54,521 INFO L93 Difference]: Finished difference Result 393 states and 490 transitions. [2022-04-06 20:43:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:43:54,521 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-04-06 20:43:54,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:54,521 INFO L225 Difference]: With dead ends: 393 [2022-04-06 20:43:54,521 INFO L226 Difference]: Without dead ends: 368 [2022-04-06 20:43:54,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2435, Invalid=12571, Unknown=0, NotChecked=0, Total=15006 [2022-04-06 20:43:54,522 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2179 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:54,522 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 135 Invalid, 2282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2179 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:43:54,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-04-06 20:43:54,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 347. [2022-04-06 20:43:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 342 states have (on average 1.286549707602339) internal successors, (440), 342 states have internal predecessors, (440), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:54,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 444 transitions. [2022-04-06 20:43:54,738 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 444 transitions. Word has length 66 [2022-04-06 20:43:54,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:54,738 INFO L478 AbstractCegarLoop]: Abstraction has 347 states and 444 transitions. [2022-04-06 20:43:54,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:54,738 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 444 transitions. [2022-04-06 20:43:54,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 20:43:54,738 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:54,738 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:54,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:54,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:54,951 INFO L403 AbstractCegarLoop]: === Iteration 266 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:54,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1058162637, now seen corresponding path program 521 times [2022-04-06 20:43:54,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:54,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1049865292] [2022-04-06 20:43:54,952 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:54,952 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:54,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1058162637, now seen corresponding path program 522 times [2022-04-06 20:43:54,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:54,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131443234] [2022-04-06 20:43:54,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:54,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:55,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:43:55,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:55,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131443234] [2022-04-06 20:43:55,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131443234] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:55,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235802048] [2022-04-06 20:43:55,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:55,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:55,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:55,526 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:55,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-04-06 20:43:58,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 20:43:58,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:58,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:43:58,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:43:58,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:44:00,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235802048] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:00,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:00,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 20:44:00,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:00,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1049865292] [2022-04-06 20:44:00,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1049865292] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:00,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:00,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:44:00,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490347215] [2022-04-06 20:44:00,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:00,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:44:00,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:00,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:44:00,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=4358, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:44:00,344 INFO L87 Difference]: Start difference. First operand 347 states and 444 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:02,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:02,402 INFO L93 Difference]: Finished difference Result 396 states and 493 transitions. [2022-04-06 20:44:02,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:44:02,403 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-04-06 20:44:02,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:02,403 INFO L225 Difference]: With dead ends: 396 [2022-04-06 20:44:02,403 INFO L226 Difference]: Without dead ends: 370 [2022-04-06 20:44:02,404 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2745, Invalid=13767, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 20:44:02,404 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:02,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 137 Invalid, 2589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:44:02,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-04-06 20:44:02,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 348. [2022-04-06 20:44:02,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 343 states have (on average 1.2857142857142858) internal successors, (441), 343 states have internal predecessors, (441), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:02,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 445 transitions. [2022-04-06 20:44:02,608 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 445 transitions. Word has length 66 [2022-04-06 20:44:02,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:02,608 INFO L478 AbstractCegarLoop]: Abstraction has 348 states and 445 transitions. [2022-04-06 20:44:02,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:02,608 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 445 transitions. [2022-04-06 20:44:02,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 20:44:02,608 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:02,608 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:02,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-04-06 20:44:02,812 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-04-06 20:44:02,812 INFO L403 AbstractCegarLoop]: === Iteration 267 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:02,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:02,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1892152191, now seen corresponding path program 523 times [2022-04-06 20:44:02,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:02,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1368726525] [2022-04-06 20:44:02,813 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:02,813 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:02,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1892152191, now seen corresponding path program 524 times [2022-04-06 20:44:02,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:02,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699717432] [2022-04-06 20:44:02,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:02,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:03,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:44:03,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:03,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699717432] [2022-04-06 20:44:03,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699717432] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:03,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680056159] [2022-04-06 20:44:03,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:03,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:03,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:03,232 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:03,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-04-06 20:44:03,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:03,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:03,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:44:03,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:44:03,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:44:04,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680056159] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:04,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:04,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 20:44:04,614 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:04,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1368726525] [2022-04-06 20:44:04,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1368726525] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:04,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:04,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:44:04,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907579024] [2022-04-06 20:44:04,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:04,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:44:04,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:04,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:44:04,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=753, Invalid=4077, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:44:04,615 INFO L87 Difference]: Start difference. First operand 348 states and 445 transitions. Second operand has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:06,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:06,687 INFO L93 Difference]: Finished difference Result 399 states and 496 transitions. [2022-04-06 20:44:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 20:44:06,687 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-04-06 20:44:06,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:06,687 INFO L225 Difference]: With dead ends: 399 [2022-04-06 20:44:06,687 INFO L226 Difference]: Without dead ends: 372 [2022-04-06 20:44:06,688 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2864, Invalid=13906, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:44:06,688 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3011 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 3011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:06,688 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 174 Invalid, 3143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 3011 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:44:06,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-04-06 20:44:06,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 349. [2022-04-06 20:44:06,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 344 states have (on average 1.2848837209302326) internal successors, (442), 344 states have internal predecessors, (442), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 446 transitions. [2022-04-06 20:44:06,895 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 446 transitions. Word has length 66 [2022-04-06 20:44:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:06,895 INFO L478 AbstractCegarLoop]: Abstraction has 349 states and 446 transitions. [2022-04-06 20:44:06,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 446 transitions. [2022-04-06 20:44:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 20:44:06,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:06,895 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:06,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-04-06 20:44:07,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-04-06 20:44:07,111 INFO L403 AbstractCegarLoop]: === Iteration 268 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:07,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:07,112 INFO L85 PathProgramCache]: Analyzing trace with hash 292524493, now seen corresponding path program 525 times [2022-04-06 20:44:07,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:07,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [744909541] [2022-04-06 20:44:07,112 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:07,112 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:07,112 INFO L85 PathProgramCache]: Analyzing trace with hash 292524493, now seen corresponding path program 526 times [2022-04-06 20:44:07,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:07,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998125233] [2022-04-06 20:44:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:07,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:07,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:44:07,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:07,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998125233] [2022-04-06 20:44:07,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998125233] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:07,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974643102] [2022-04-06 20:44:07,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:07,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:07,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:07,644 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:07,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-04-06 20:44:07,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:07,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:07,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:44:07,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:44:07,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:44:08,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974643102] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:08,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:08,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 20:44:08,938 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:08,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [744909541] [2022-04-06 20:44:08,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [744909541] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:08,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:08,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:44:08,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508849605] [2022-04-06 20:44:08,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:08,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:44:08,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:08,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:44:08,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=3804, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:44:08,939 INFO L87 Difference]: Start difference. First operand 349 states and 446 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:10,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:10,840 INFO L93 Difference]: Finished difference Result 402 states and 499 transitions. [2022-04-06 20:44:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:44:10,840 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-04-06 20:44:10,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:10,840 INFO L225 Difference]: With dead ends: 402 [2022-04-06 20:44:10,841 INFO L226 Difference]: Without dead ends: 374 [2022-04-06 20:44:10,841 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2754, Invalid=12996, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 20:44:10,841 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2937 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 3070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:10,841 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 171 Invalid, 3070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2937 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:44:10,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-04-06 20:44:11,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 350. [2022-04-06 20:44:11,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.2840579710144928) internal successors, (443), 345 states have internal predecessors, (443), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:11,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 447 transitions. [2022-04-06 20:44:11,067 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 447 transitions. Word has length 66 [2022-04-06 20:44:11,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:11,067 INFO L478 AbstractCegarLoop]: Abstraction has 350 states and 447 transitions. [2022-04-06 20:44:11,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 447 transitions. [2022-04-06 20:44:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 20:44:11,067 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:11,067 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:11,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:11,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-04-06 20:44:11,283 INFO L403 AbstractCegarLoop]: === Iteration 269 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:11,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:11,284 INFO L85 PathProgramCache]: Analyzing trace with hash 803893631, now seen corresponding path program 527 times [2022-04-06 20:44:11,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:11,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1423730749] [2022-04-06 20:44:11,284 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:11,284 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:11,284 INFO L85 PathProgramCache]: Analyzing trace with hash 803893631, now seen corresponding path program 528 times [2022-04-06 20:44:11,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:11,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108328467] [2022-04-06 20:44:11,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:11,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:11,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:44:11,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:11,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108328467] [2022-04-06 20:44:11,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108328467] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:11,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174545665] [2022-04-06 20:44:11,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:11,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:11,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:11,685 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:11,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-04-06 20:44:16,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 20:44:16,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:16,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:44:16,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:44:17,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:44:18,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174545665] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:18,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:18,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:44:18,202 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:18,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1423730749] [2022-04-06 20:44:18,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1423730749] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:18,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:18,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:44:18,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150374760] [2022-04-06 20:44:18,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:18,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:44:18,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:18,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:44:18,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3529, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:44:18,203 INFO L87 Difference]: Start difference. First operand 350 states and 447 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:19,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:19,690 INFO L93 Difference]: Finished difference Result 405 states and 502 transitions. [2022-04-06 20:44:19,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:44:19,690 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-04-06 20:44:19,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:19,691 INFO L225 Difference]: With dead ends: 405 [2022-04-06 20:44:19,691 INFO L226 Difference]: Without dead ends: 376 [2022-04-06 20:44:19,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2467, Invalid=11105, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 20:44:19,692 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2510 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:19,692 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 153 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:44:19,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-04-06 20:44:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 351. [2022-04-06 20:44:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.283236994219653) internal successors, (444), 346 states have internal predecessors, (444), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 448 transitions. [2022-04-06 20:44:19,912 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 448 transitions. Word has length 66 [2022-04-06 20:44:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:19,912 INFO L478 AbstractCegarLoop]: Abstraction has 351 states and 448 transitions. [2022-04-06 20:44:19,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 448 transitions. [2022-04-06 20:44:19,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 20:44:19,913 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:19,913 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:19,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:20,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-04-06 20:44:20,119 INFO L403 AbstractCegarLoop]: === Iteration 270 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:20,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:20,119 INFO L85 PathProgramCache]: Analyzing trace with hash 399854541, now seen corresponding path program 529 times [2022-04-06 20:44:20,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:20,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1160979843] [2022-04-06 20:44:20,120 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:20,120 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:20,120 INFO L85 PathProgramCache]: Analyzing trace with hash 399854541, now seen corresponding path program 530 times [2022-04-06 20:44:20,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:20,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654669050] [2022-04-06 20:44:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:20,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:20,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:44:20,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:20,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654669050] [2022-04-06 20:44:20,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654669050] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:20,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897643679] [2022-04-06 20:44:20,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:20,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:20,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:20,551 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:20,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-04-06 20:44:20,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:20,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:20,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:44:20,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:44:20,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:44:21,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897643679] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:21,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:21,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:44:21,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:21,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1160979843] [2022-04-06 20:44:21,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1160979843] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:21,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:21,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:44:21,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845324604] [2022-04-06 20:44:21,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:21,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:44:21,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:21,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:44:21,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=3252, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:44:21,716 INFO L87 Difference]: Start difference. First operand 351 states and 448 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:23,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:23,324 INFO L93 Difference]: Finished difference Result 408 states and 505 transitions. [2022-04-06 20:44:23,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:44:23,324 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-04-06 20:44:23,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:23,325 INFO L225 Difference]: With dead ends: 408 [2022-04-06 20:44:23,325 INFO L226 Difference]: Without dead ends: 378 [2022-04-06 20:44:23,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2060, Invalid=8652, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:44:23,325 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 58 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:23,325 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 167 Invalid, 2610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:44:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-04-06 20:44:23,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 352. [2022-04-06 20:44:23,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 347 states have (on average 1.282420749279539) internal successors, (445), 347 states have internal predecessors, (445), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 449 transitions. [2022-04-06 20:44:23,544 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 449 transitions. Word has length 66 [2022-04-06 20:44:23,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:23,544 INFO L478 AbstractCegarLoop]: Abstraction has 352 states and 449 transitions. [2022-04-06 20:44:23,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:23,545 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 449 transitions. [2022-04-06 20:44:23,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 20:44:23,545 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:23,545 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:23,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:23,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-04-06 20:44:23,761 INFO L403 AbstractCegarLoop]: === Iteration 271 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:23,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:23,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1343520639, now seen corresponding path program 531 times [2022-04-06 20:44:23,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:23,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1601649235] [2022-04-06 20:44:23,762 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:23,762 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:23,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1343520639, now seen corresponding path program 532 times [2022-04-06 20:44:23,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:23,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788520797] [2022-04-06 20:44:23,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:23,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:24,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 328 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 20:44:24,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:24,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788520797] [2022-04-06 20:44:24,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788520797] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:24,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662752658] [2022-04-06 20:44:24,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:24,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:24,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:24,217 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:24,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-04-06 20:44:24,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:24,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:24,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:44:24,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 328 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 20:44:24,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 328 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 20:44:25,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662752658] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:25,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:25,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 20:44:25,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:25,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1601649235] [2022-04-06 20:44:25,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1601649235] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:25,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:25,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:44:25,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501825307] [2022-04-06 20:44:25,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:25,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:44:25,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:25,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:44:25,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=809, Invalid=2973, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:44:25,528 INFO L87 Difference]: Start difference. First operand 352 states and 449 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:26,730 INFO L93 Difference]: Finished difference Result 411 states and 508 transitions. [2022-04-06 20:44:26,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:44:26,730 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-04-06 20:44:26,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:26,731 INFO L225 Difference]: With dead ends: 411 [2022-04-06 20:44:26,731 INFO L226 Difference]: Without dead ends: 380 [2022-04-06 20:44:26,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1802, Invalid=6940, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:44:26,731 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 67 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 2541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:26,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 170 Invalid, 2541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:44:26,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-04-06 20:44:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 353. [2022-04-06 20:44:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 348 states have (on average 1.2816091954022988) internal successors, (446), 348 states have internal predecessors, (446), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 450 transitions. [2022-04-06 20:44:26,946 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 450 transitions. Word has length 66 [2022-04-06 20:44:26,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:26,946 INFO L478 AbstractCegarLoop]: Abstraction has 353 states and 450 transitions. [2022-04-06 20:44:26,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 450 transitions. [2022-04-06 20:44:26,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 20:44:26,947 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:26,947 INFO L499 BasicCegarLoop]: trace histogram [49, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:26,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:27,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-04-06 20:44:27,150 INFO L403 AbstractCegarLoop]: === Iteration 272 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:27,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:27,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1985700622, now seen corresponding path program 533 times [2022-04-06 20:44:27,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:27,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [889064997] [2022-04-06 20:44:27,151 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:27,151 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:27,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1985700622, now seen corresponding path program 534 times [2022-04-06 20:44:27,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:27,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086708006] [2022-04-06 20:44:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:27,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:28,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 0 proven. 1226 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:44:28,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:28,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086708006] [2022-04-06 20:44:28,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086708006] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:28,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937002882] [2022-04-06 20:44:28,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:28,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:28,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:28,105 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:28,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-04-06 20:44:28,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:44:28,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:28,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:44:28,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-04-06 20:44:28,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-04-06 20:44:28,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937002882] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:28,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:28,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 6, 6] total 61 [2022-04-06 20:44:28,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:28,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [889064997] [2022-04-06 20:44:28,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [889064997] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:28,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:28,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 20:44:28,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640083517] [2022-04-06 20:44:28,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:28,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 20:44:28,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:28,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 20:44:28,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=3528, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:44:28,433 INFO L87 Difference]: Start difference. First operand 353 states and 450 transitions. Second operand has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:32,185 INFO L93 Difference]: Finished difference Result 601 states and 902 transitions. [2022-04-06 20:44:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:44:32,185 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-04-06 20:44:32,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:32,186 INFO L225 Difference]: With dead ends: 601 [2022-04-06 20:44:32,186 INFO L226 Difference]: Without dead ends: 593 [2022-04-06 20:44:32,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=363, Invalid=12519, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 20:44:32,187 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 267 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 11791 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 11998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 11791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:32,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 361 Invalid, 11998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 11791 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 20:44:32,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-04-06 20:44:32,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 359. [2022-04-06 20:44:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 354 states have (on average 1.2824858757062148) internal successors, (454), 354 states have internal predecessors, (454), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 458 transitions. [2022-04-06 20:44:32,413 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 458 transitions. Word has length 66 [2022-04-06 20:44:32,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:32,413 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 458 transitions. [2022-04-06 20:44:32,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 458 transitions. [2022-04-06 20:44:32,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:44:32,413 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:32,413 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:32,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-04-06 20:44:32,629 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2022-04-06 20:44:32,629 INFO L403 AbstractCegarLoop]: === Iteration 273 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:32,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:32,629 INFO L85 PathProgramCache]: Analyzing trace with hash 703266543, now seen corresponding path program 535 times [2022-04-06 20:44:32,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:32,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2122446727] [2022-04-06 20:44:32,630 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:32,630 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:32,630 INFO L85 PathProgramCache]: Analyzing trace with hash 703266543, now seen corresponding path program 536 times [2022-04-06 20:44:32,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:32,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64766930] [2022-04-06 20:44:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:32,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:33,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:44:33,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:33,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64766930] [2022-04-06 20:44:33,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64766930] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:33,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970348104] [2022-04-06 20:44:33,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:33,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:33,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:33,306 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:33,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-04-06 20:44:33,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:33,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:33,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 110 conjunts are in the unsatisfiable core [2022-04-06 20:44:33,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:44:33,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:44:35,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970348104] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:35,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:35,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 38] total 94 [2022-04-06 20:44:35,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:35,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2122446727] [2022-04-06 20:44:35,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2122446727] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:35,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:35,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:44:35,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569237989] [2022-04-06 20:44:35,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:35,336 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:44:35,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:35,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:44:35,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=7835, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:44:35,337 INFO L87 Difference]: Start difference. First operand 359 states and 458 transitions. Second operand has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:37,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:37,078 INFO L93 Difference]: Finished difference Result 404 states and 503 transitions. [2022-04-06 20:44:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:44:37,078 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 20:44:37,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:37,078 INFO L225 Difference]: With dead ends: 404 [2022-04-06 20:44:37,078 INFO L226 Difference]: Without dead ends: 380 [2022-04-06 20:44:37,079 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3053 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1469, Invalid=15561, Unknown=0, NotChecked=0, Total=17030 [2022-04-06 20:44:37,079 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2156 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:37,079 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 173 Invalid, 2232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:44:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-04-06 20:44:37,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 360. [2022-04-06 20:44:37,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 355 states have (on average 1.2816901408450705) internal successors, (455), 355 states have internal predecessors, (455), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 459 transitions. [2022-04-06 20:44:37,299 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 459 transitions. Word has length 67 [2022-04-06 20:44:37,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:37,299 INFO L478 AbstractCegarLoop]: Abstraction has 360 states and 459 transitions. [2022-04-06 20:44:37,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 459 transitions. [2022-04-06 20:44:37,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:44:37,300 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:37,300 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:37,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-04-06 20:44:37,516 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:37,516 INFO L403 AbstractCegarLoop]: === Iteration 274 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:37,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:37,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1709129217, now seen corresponding path program 537 times [2022-04-06 20:44:37,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:37,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [572829351] [2022-04-06 20:44:37,517 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:37,517 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:37,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1709129217, now seen corresponding path program 538 times [2022-04-06 20:44:37,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:37,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799846064] [2022-04-06 20:44:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:37,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:37,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:44:37,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:37,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799846064] [2022-04-06 20:44:37,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799846064] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:37,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004069506] [2022-04-06 20:44:37,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:37,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:37,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:37,925 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:37,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-04-06 20:44:37,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:37,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:37,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:44:37,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:44:38,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:44:39,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004069506] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:39,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:39,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 20:44:39,244 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:39,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [572829351] [2022-04-06 20:44:39,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [572829351] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:39,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:39,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:44:39,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259561421] [2022-04-06 20:44:39,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:39,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:44:39,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:39,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:44:39,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=797, Invalid=4903, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:44:39,245 INFO L87 Difference]: Start difference. First operand 360 states and 459 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:41,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:41,062 INFO L93 Difference]: Finished difference Result 407 states and 506 transitions. [2022-04-06 20:44:41,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:44:41,062 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 20:44:41,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:41,062 INFO L225 Difference]: With dead ends: 407 [2022-04-06 20:44:41,062 INFO L226 Difference]: Without dead ends: 382 [2022-04-06 20:44:41,063 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2575, Invalid=13427, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 20:44:41,063 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2647 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 2753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:41,063 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 170 Invalid, 2753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2647 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:44:41,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-04-06 20:44:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 361. [2022-04-06 20:44:41,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 356 states have (on average 1.2808988764044944) internal successors, (456), 356 states have internal predecessors, (456), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 460 transitions. [2022-04-06 20:44:41,286 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 460 transitions. Word has length 67 [2022-04-06 20:44:41,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:41,286 INFO L478 AbstractCegarLoop]: Abstraction has 361 states and 460 transitions. [2022-04-06 20:44:41,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:41,286 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 460 transitions. [2022-04-06 20:44:41,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:44:41,287 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:41,287 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:41,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:41,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:41,499 INFO L403 AbstractCegarLoop]: === Iteration 275 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:41,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:41,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2230993, now seen corresponding path program 539 times [2022-04-06 20:44:41,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:41,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1860474204] [2022-04-06 20:44:41,500 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:41,500 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:41,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2230993, now seen corresponding path program 540 times [2022-04-06 20:44:41,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:41,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256546880] [2022-04-06 20:44:41,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:41,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:42,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:44:42,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:42,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256546880] [2022-04-06 20:44:42,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256546880] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:42,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137726070] [2022-04-06 20:44:42,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:42,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:42,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:42,101 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:42,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-04-06 20:44:46,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 20:44:46,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:46,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 20:44:46,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:44:47,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:44:48,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137726070] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:48,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:48,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-04-06 20:44:48,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:48,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1860474204] [2022-04-06 20:44:48,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1860474204] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:48,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:48,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:44:48,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125300776] [2022-04-06 20:44:48,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:48,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:44:48,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:48,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:44:48,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=4620, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:44:48,122 INFO L87 Difference]: Start difference. First operand 361 states and 460 transitions. Second operand has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:49,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:49,781 INFO L93 Difference]: Finished difference Result 410 states and 509 transitions. [2022-04-06 20:44:49,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 20:44:49,782 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 20:44:49,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:49,782 INFO L225 Difference]: With dead ends: 410 [2022-04-06 20:44:49,782 INFO L226 Difference]: Without dead ends: 384 [2022-04-06 20:44:49,783 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2925, Invalid=14897, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 20:44:49,783 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2715 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 2844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:49,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 147 Invalid, 2844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2715 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:44:49,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-04-06 20:44:50,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 362. [2022-04-06 20:44:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 357 states have (on average 1.280112044817927) internal successors, (457), 357 states have internal predecessors, (457), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 461 transitions. [2022-04-06 20:44:50,013 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 461 transitions. Word has length 67 [2022-04-06 20:44:50,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:50,013 INFO L478 AbstractCegarLoop]: Abstraction has 362 states and 461 transitions. [2022-04-06 20:44:50,014 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:50,014 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 461 transitions. [2022-04-06 20:44:50,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:44:50,014 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:50,014 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:50,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-04-06 20:44:50,217 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2022-04-06 20:44:50,217 INFO L403 AbstractCegarLoop]: === Iteration 276 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:50,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:50,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1563882561, now seen corresponding path program 541 times [2022-04-06 20:44:50,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:50,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1000505972] [2022-04-06 20:44:50,218 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:50,218 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:50,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1563882561, now seen corresponding path program 542 times [2022-04-06 20:44:50,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:50,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718005953] [2022-04-06 20:44:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:50,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:50,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:44:50,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:50,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718005953] [2022-04-06 20:44:50,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718005953] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:50,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118315306] [2022-04-06 20:44:50,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:50,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:50,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:50,634 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:50,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-04-06 20:44:50,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:50,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:50,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:44:50,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:44:50,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:44:51,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118315306] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:51,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:51,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 20:44:51,991 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:51,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1000505972] [2022-04-06 20:44:51,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1000505972] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:51,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:51,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:44:51,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417968584] [2022-04-06 20:44:51,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:51,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:44:51,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:51,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:44:51,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=777, Invalid=4335, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:44:51,992 INFO L87 Difference]: Start difference. First operand 362 states and 461 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:53,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:53,812 INFO L93 Difference]: Finished difference Result 413 states and 512 transitions. [2022-04-06 20:44:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:44:53,812 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 20:44:53,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:53,812 INFO L225 Difference]: With dead ends: 413 [2022-04-06 20:44:53,812 INFO L226 Difference]: Without dead ends: 386 [2022-04-06 20:44:53,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=15279, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 20:44:53,813 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3177 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 3177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:53,813 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 174 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 3177 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:44:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-04-06 20:44:54,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 363. [2022-04-06 20:44:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 358 states have (on average 1.2793296089385475) internal successors, (458), 358 states have internal predecessors, (458), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 462 transitions. [2022-04-06 20:44:54,041 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 462 transitions. Word has length 67 [2022-04-06 20:44:54,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:54,041 INFO L478 AbstractCegarLoop]: Abstraction has 363 states and 462 transitions. [2022-04-06 20:44:54,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:54,041 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 462 transitions. [2022-04-06 20:44:54,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:44:54,042 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:54,042 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:54,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:54,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:54,255 INFO L403 AbstractCegarLoop]: === Iteration 277 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:54,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:54,255 INFO L85 PathProgramCache]: Analyzing trace with hash 915630959, now seen corresponding path program 543 times [2022-04-06 20:44:54,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:54,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [478532020] [2022-04-06 20:44:54,255 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:54,256 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:54,256 INFO L85 PathProgramCache]: Analyzing trace with hash 915630959, now seen corresponding path program 544 times [2022-04-06 20:44:54,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:54,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576449728] [2022-04-06 20:44:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:54,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:54,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 298 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:44:54,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:54,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576449728] [2022-04-06 20:44:54,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576449728] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:54,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145178060] [2022-04-06 20:44:54,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:54,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:54,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:54,733 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:54,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-04-06 20:44:54,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:54,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:54,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:44:54,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 298 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:44:54,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 298 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:44:55,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145178060] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:55,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:55,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 20:44:55,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:55,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [478532020] [2022-04-06 20:44:55,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [478532020] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:55,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:55,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:44:55,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609759559] [2022-04-06 20:44:55,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:55,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:44:55,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:55,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:44:55,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=776, Invalid=4054, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:44:55,962 INFO L87 Difference]: Start difference. First operand 363 states and 462 transitions. Second operand has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:57,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:57,958 INFO L93 Difference]: Finished difference Result 416 states and 515 transitions. [2022-04-06 20:44:57,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:44:57,958 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 20:44:57,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:57,959 INFO L225 Difference]: With dead ends: 416 [2022-04-06 20:44:57,959 INFO L226 Difference]: Without dead ends: 388 [2022-04-06 20:44:57,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2279 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3017, Invalid=14539, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:44:57,959 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2867 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:57,960 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 151 Invalid, 3013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2867 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:44:57,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-04-06 20:44:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 364. [2022-04-06 20:44:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 359 states have (on average 1.2785515320334262) internal successors, (459), 359 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 463 transitions. [2022-04-06 20:44:58,184 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 463 transitions. Word has length 67 [2022-04-06 20:44:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:58,184 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 463 transitions. [2022-04-06 20:44:58,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 463 transitions. [2022-04-06 20:44:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:44:58,185 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:58,185 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:58,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-04-06 20:44:58,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:58,387 INFO L403 AbstractCegarLoop]: === Iteration 278 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:58,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:58,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1212361345, now seen corresponding path program 545 times [2022-04-06 20:44:58,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:58,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [443436781] [2022-04-06 20:44:58,388 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:58,388 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:58,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1212361345, now seen corresponding path program 546 times [2022-04-06 20:44:58,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:58,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121936664] [2022-04-06 20:44:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:58,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:58,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:44:58,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:58,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121936664] [2022-04-06 20:44:58,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121936664] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:58,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133881732] [2022-04-06 20:44:58,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:58,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:58,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:58,856 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:58,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-04-06 20:45:01,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 20:45:01,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:01,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:45:01,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:45:01,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:45:02,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133881732] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:02,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:02,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 20:45:02,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:02,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [443436781] [2022-04-06 20:45:02,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [443436781] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:02,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:02,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:45:02,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348239290] [2022-04-06 20:45:02,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:02,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:45:02,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:45:02,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=3775, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:45:02,718 INFO L87 Difference]: Start difference. First operand 364 states and 463 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:04,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:04,384 INFO L93 Difference]: Finished difference Result 419 states and 518 transitions. [2022-04-06 20:45:04,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:45:04,384 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 20:45:04,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:04,385 INFO L225 Difference]: With dead ends: 419 [2022-04-06 20:45:04,385 INFO L226 Difference]: Without dead ends: 390 [2022-04-06 20:45:04,386 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1873 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2753, Invalid=12747, Unknown=0, NotChecked=0, Total=15500 [2022-04-06 20:45:04,386 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2924 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:04,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 168 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2924 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:45:04,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-04-06 20:45:04,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 365. [2022-04-06 20:45:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 360 states have (on average 1.2777777777777777) internal successors, (460), 360 states have internal predecessors, (460), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:04,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 464 transitions. [2022-04-06 20:45:04,624 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 464 transitions. Word has length 67 [2022-04-06 20:45:04,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:04,624 INFO L478 AbstractCegarLoop]: Abstraction has 365 states and 464 transitions. [2022-04-06 20:45:04,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:04,624 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 464 transitions. [2022-04-06 20:45:04,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:45:04,624 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:04,625 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:04,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:04,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-04-06 20:45:04,830 INFO L403 AbstractCegarLoop]: === Iteration 279 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:04,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:04,830 INFO L85 PathProgramCache]: Analyzing trace with hash 99574191, now seen corresponding path program 547 times [2022-04-06 20:45:04,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:04,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1640334246] [2022-04-06 20:45:04,831 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:04,831 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:04,831 INFO L85 PathProgramCache]: Analyzing trace with hash 99574191, now seen corresponding path program 548 times [2022-04-06 20:45:04,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:04,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954169039] [2022-04-06 20:45:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:04,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:05,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:45:05,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:05,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954169039] [2022-04-06 20:45:05,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954169039] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:05,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654342729] [2022-04-06 20:45:05,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:05,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:05,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:05,333 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:05,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-04-06 20:45:05,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:05,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:05,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:45:05,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:45:05,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:45:06,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654342729] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:06,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:06,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:45:06,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:06,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1640334246] [2022-04-06 20:45:06,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1640334246] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:06,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:06,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:45:06,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384703216] [2022-04-06 20:45:06,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:06,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:45:06,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:06,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:45:06,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=796, Invalid=3494, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:45:06,791 INFO L87 Difference]: Start difference. First operand 365 states and 464 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:08,354 INFO L93 Difference]: Finished difference Result 422 states and 521 transitions. [2022-04-06 20:45:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:45:08,355 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 20:45:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:08,355 INFO L225 Difference]: With dead ends: 422 [2022-04-06 20:45:08,355 INFO L226 Difference]: Without dead ends: 392 [2022-04-06 20:45:08,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2322, Invalid=10110, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:45:08,356 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 57 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2734 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:08,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 171 Invalid, 2840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2734 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:45:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-04-06 20:45:08,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 366. [2022-04-06 20:45:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 361 states have (on average 1.2770083102493075) internal successors, (461), 361 states have internal predecessors, (461), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:08,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 465 transitions. [2022-04-06 20:45:08,585 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 465 transitions. Word has length 67 [2022-04-06 20:45:08,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:08,585 INFO L478 AbstractCegarLoop]: Abstraction has 366 states and 465 transitions. [2022-04-06 20:45:08,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:08,586 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 465 transitions. [2022-04-06 20:45:08,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:45:08,586 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:08,586 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:08,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:08,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-04-06 20:45:08,793 INFO L403 AbstractCegarLoop]: === Iteration 280 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:08,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:08,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1256710337, now seen corresponding path program 549 times [2022-04-06 20:45:08,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:08,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [848401153] [2022-04-06 20:45:08,794 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:08,794 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:08,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1256710337, now seen corresponding path program 550 times [2022-04-06 20:45:08,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:08,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352237994] [2022-04-06 20:45:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:08,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:09,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 20:45:09,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:09,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352237994] [2022-04-06 20:45:09,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352237994] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:09,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933859027] [2022-04-06 20:45:09,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:09,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:09,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:09,277 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:09,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-04-06 20:45:09,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:09,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:09,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:45:09,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 20:45:09,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 20:45:10,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933859027] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:10,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:10,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:45:10,275 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:10,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [848401153] [2022-04-06 20:45:10,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [848401153] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:10,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:10,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:45:10,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534396554] [2022-04-06 20:45:10,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:10,276 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:45:10,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:10,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:45:10,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3211, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:45:10,276 INFO L87 Difference]: Start difference. First operand 366 states and 465 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:11,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:11,554 INFO L93 Difference]: Finished difference Result 425 states and 524 transitions. [2022-04-06 20:45:11,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:45:11,555 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 20:45:11,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:11,555 INFO L225 Difference]: With dead ends: 425 [2022-04-06 20:45:11,555 INFO L226 Difference]: Without dead ends: 394 [2022-04-06 20:45:11,556 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1969, Invalid=7931, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:45:11,556 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2676 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:11,556 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 176 Invalid, 2755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2676 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:45:11,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-04-06 20:45:11,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 367. [2022-04-06 20:45:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 362 states have (on average 1.276243093922652) internal successors, (462), 362 states have internal predecessors, (462), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 466 transitions. [2022-04-06 20:45:11,790 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 466 transitions. Word has length 67 [2022-04-06 20:45:11,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:11,790 INFO L478 AbstractCegarLoop]: Abstraction has 367 states and 466 transitions. [2022-04-06 20:45:11,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:11,790 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 466 transitions. [2022-04-06 20:45:11,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:45:11,790 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:11,791 INFO L499 BasicCegarLoop]: trace histogram [50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:11,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:12,006 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-04-06 20:45:12,006 INFO L403 AbstractCegarLoop]: === Iteration 281 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:12,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:12,007 INFO L85 PathProgramCache]: Analyzing trace with hash 883625967, now seen corresponding path program 551 times [2022-04-06 20:45:12,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:12,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [722650917] [2022-04-06 20:45:12,007 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:12,007 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:12,007 INFO L85 PathProgramCache]: Analyzing trace with hash 883625967, now seen corresponding path program 552 times [2022-04-06 20:45:12,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:12,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837693122] [2022-04-06 20:45:12,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:12,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:12,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:12,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:12,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837693122] [2022-04-06 20:45:12,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837693122] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:12,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191314616] [2022-04-06 20:45:12,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:12,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:12,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:12,969 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:12,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-04-06 20:45:13,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:45:13,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:13,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:45:13,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2022-04-06 20:45:13,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2022-04-06 20:45:13,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191314616] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:13,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:13,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 6, 6] total 62 [2022-04-06 20:45:13,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:13,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [722650917] [2022-04-06 20:45:13,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [722650917] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:13,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:13,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:45:13,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177847501] [2022-04-06 20:45:13,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:13,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:45:13,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:13,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:45:13,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=3648, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:45:13,421 INFO L87 Difference]: Start difference. First operand 367 states and 466 transitions. Second operand has 56 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:17,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:17,277 INFO L93 Difference]: Finished difference Result 616 states and 920 transitions. [2022-04-06 20:45:17,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 20:45:17,278 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 20:45:17,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:17,278 INFO L225 Difference]: With dead ends: 616 [2022-04-06 20:45:17,278 INFO L226 Difference]: Without dead ends: 608 [2022-04-06 20:45:17,279 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=369, Invalid=12971, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 20:45:17,279 INFO L913 BasicCegarLoop]: 107 mSDtfsCounter, 275 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 12333 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 12544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 12333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:17,279 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 369 Invalid, 12544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 12333 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 20:45:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-04-06 20:45:17,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 373. [2022-04-06 20:45:17,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 368 states have (on average 1.2771739130434783) internal successors, (470), 368 states have internal predecessors, (470), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:17,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 474 transitions. [2022-04-06 20:45:17,516 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 474 transitions. Word has length 67 [2022-04-06 20:45:17,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:17,516 INFO L478 AbstractCegarLoop]: Abstraction has 373 states and 474 transitions. [2022-04-06 20:45:17,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:17,516 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 474 transitions. [2022-04-06 20:45:17,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:45:17,517 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:17,517 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:17,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-04-06 20:45:17,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-04-06 20:45:17,733 INFO L403 AbstractCegarLoop]: === Iteration 282 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:17,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:17,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1372557837, now seen corresponding path program 553 times [2022-04-06 20:45:17,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:17,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [67284295] [2022-04-06 20:45:17,733 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:17,733 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:17,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1372557837, now seen corresponding path program 554 times [2022-04-06 20:45:17,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:17,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651900207] [2022-04-06 20:45:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:17,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:18,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:45:18,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:18,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651900207] [2022-04-06 20:45:18,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651900207] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:18,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307546192] [2022-04-06 20:45:18,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:18,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:18,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:18,104 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:18,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-04-06 20:45:18,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:18,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:18,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 20:45:18,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:45:18,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:45:18,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307546192] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:18,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:18,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 26 [2022-04-06 20:45:18,341 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:18,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [67284295] [2022-04-06 20:45:18,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [67284295] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:18,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:18,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:45:18,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809861230] [2022-04-06 20:45:18,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:18,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:45:18,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:18,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:45:18,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:45:18,341 INFO L87 Difference]: Start difference. First operand 373 states and 474 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:21,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:21,781 INFO L93 Difference]: Finished difference Result 1700 states and 2308 transitions. [2022-04-06 20:45:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:45:21,781 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 20:45:21,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:21,783 INFO L225 Difference]: With dead ends: 1700 [2022-04-06 20:45:21,783 INFO L226 Difference]: Without dead ends: 1676 [2022-04-06 20:45:21,784 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=2025, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:45:21,784 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 65 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2046 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:21,784 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 172 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2046 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:45:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2022-04-06 20:45:22,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 377. [2022-04-06 20:45:22,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 372 states have (on average 1.2795698924731183) internal successors, (476), 372 states have internal predecessors, (476), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 480 transitions. [2022-04-06 20:45:22,037 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 480 transitions. Word has length 68 [2022-04-06 20:45:22,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:22,037 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 480 transitions. [2022-04-06 20:45:22,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:22,037 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 480 transitions. [2022-04-06 20:45:22,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:45:22,037 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:22,037 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:22,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:22,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2022-04-06 20:45:22,253 INFO L403 AbstractCegarLoop]: === Iteration 283 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:22,253 INFO L85 PathProgramCache]: Analyzing trace with hash -112945793, now seen corresponding path program 555 times [2022-04-06 20:45:22,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:22,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1420662906] [2022-04-06 20:45:22,254 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:22,254 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:22,254 INFO L85 PathProgramCache]: Analyzing trace with hash -112945793, now seen corresponding path program 556 times [2022-04-06 20:45:22,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:22,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390380244] [2022-04-06 20:45:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:22,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:22,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:45:22,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:22,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390380244] [2022-04-06 20:45:22,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390380244] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:22,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179021689] [2022-04-06 20:45:22,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:22,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:22,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:22,926 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:22,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-04-06 20:45:22,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:22,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:22,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 108 conjunts are in the unsatisfiable core [2022-04-06 20:45:22,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:45:23,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 51 proven. 272 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 20:45:25,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179021689] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:25,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:25,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 36] total 91 [2022-04-06 20:45:25,440 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:25,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1420662906] [2022-04-06 20:45:25,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1420662906] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:25,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:25,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:45:25,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845661874] [2022-04-06 20:45:25,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:25,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:45:25,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:25,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:45:25,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=833, Invalid=7357, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:45:25,441 INFO L87 Difference]: Start difference. First operand 377 states and 480 transitions. Second operand has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:27,805 INFO L93 Difference]: Finished difference Result 424 states and 527 transitions. [2022-04-06 20:45:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:45:27,805 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 20:45:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:27,806 INFO L225 Difference]: With dead ends: 424 [2022-04-06 20:45:27,806 INFO L226 Difference]: Without dead ends: 399 [2022-04-06 20:45:27,806 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3794 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1730, Invalid=18862, Unknown=0, NotChecked=0, Total=20592 [2022-04-06 20:45:27,807 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2271 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:27,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 125 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2271 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:45:27,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-04-06 20:45:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 378. [2022-04-06 20:45:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 373 states have (on average 1.2788203753351206) internal successors, (477), 373 states have internal predecessors, (477), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 481 transitions. [2022-04-06 20:45:28,070 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 481 transitions. Word has length 68 [2022-04-06 20:45:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:28,070 INFO L478 AbstractCegarLoop]: Abstraction has 378 states and 481 transitions. [2022-04-06 20:45:28,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:28,070 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 481 transitions. [2022-04-06 20:45:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:45:28,070 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:28,070 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:28,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-04-06 20:45:28,286 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:28,286 INFO L403 AbstractCegarLoop]: === Iteration 284 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:28,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:28,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1485304845, now seen corresponding path program 557 times [2022-04-06 20:45:28,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:28,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1502767706] [2022-04-06 20:45:28,287 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:28,287 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:28,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1485304845, now seen corresponding path program 558 times [2022-04-06 20:45:28,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:28,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807964895] [2022-04-06 20:45:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:28,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:28,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:45:28,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:28,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807964895] [2022-04-06 20:45:28,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807964895] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:28,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509837312] [2022-04-06 20:45:28,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:28,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:28,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:28,700 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:28,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-04-06 20:45:31,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 20:45:31,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:31,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:45:31,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:45:31,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:45:32,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509837312] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:32,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:32,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 20:45:32,770 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:32,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1502767706] [2022-04-06 20:45:32,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1502767706] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:32,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:32,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:45:32,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107225590] [2022-04-06 20:45:32,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:32,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:45:32,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:32,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:45:32,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=812, Invalid=4888, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:45:32,771 INFO L87 Difference]: Start difference. First operand 378 states and 481 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:34,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:34,743 INFO L93 Difference]: Finished difference Result 427 states and 530 transitions. [2022-04-06 20:45:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:45:34,743 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 20:45:34,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:34,743 INFO L225 Difference]: With dead ends: 427 [2022-04-06 20:45:34,743 INFO L226 Difference]: Without dead ends: 401 [2022-04-06 20:45:34,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2515 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3113, Invalid=16069, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 20:45:34,744 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3255 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 3389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 3255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:34,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 182 Invalid, 3389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 3255 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:45:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-04-06 20:45:34,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 379. [2022-04-06 20:45:34,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 374 states have (on average 1.2780748663101604) internal successors, (478), 374 states have internal predecessors, (478), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 482 transitions. [2022-04-06 20:45:34,999 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 482 transitions. Word has length 68 [2022-04-06 20:45:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:34,999 INFO L478 AbstractCegarLoop]: Abstraction has 379 states and 482 transitions. [2022-04-06 20:45:34,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 482 transitions. [2022-04-06 20:45:34,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:45:34,999 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:34,999 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:35,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:35,204 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:35,205 INFO L403 AbstractCegarLoop]: === Iteration 285 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:35,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:35,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1326777473, now seen corresponding path program 559 times [2022-04-06 20:45:35,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:35,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [622430751] [2022-04-06 20:45:35,206 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:35,206 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:35,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1326777473, now seen corresponding path program 560 times [2022-04-06 20:45:35,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:35,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885842779] [2022-04-06 20:45:35,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:35,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:35,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 309 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:45:35,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:35,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885842779] [2022-04-06 20:45:35,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885842779] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:35,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577917319] [2022-04-06 20:45:35,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:35,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:35,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:35,765 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:35,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-04-06 20:45:35,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:35,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:35,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 20:45:35,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 309 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:45:36,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 309 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:45:37,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577917319] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:37,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:37,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-04-06 20:45:37,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:37,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [622430751] [2022-04-06 20:45:37,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [622430751] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:37,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:37,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:45:37,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258582842] [2022-04-06 20:45:37,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:37,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:45:37,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:37,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:45:37,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=4599, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:45:37,247 INFO L87 Difference]: Start difference. First operand 379 states and 482 transitions. Second operand has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:39,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:39,169 INFO L93 Difference]: Finished difference Result 430 states and 533 transitions. [2022-04-06 20:45:39,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 20:45:39,169 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 20:45:39,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:39,170 INFO L225 Difference]: With dead ends: 430 [2022-04-06 20:45:39,170 INFO L226 Difference]: Without dead ends: 403 [2022-04-06 20:45:39,170 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2731 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3304, Invalid=16718, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 20:45:39,171 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3229 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 3378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 3229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:39,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 164 Invalid, 3378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 3229 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:45:39,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-04-06 20:45:39,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 380. [2022-04-06 20:45:39,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.2773333333333334) internal successors, (479), 375 states have internal predecessors, (479), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:39,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 483 transitions. [2022-04-06 20:45:39,422 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 483 transitions. Word has length 68 [2022-04-06 20:45:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:39,422 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 483 transitions. [2022-04-06 20:45:39,422 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:39,422 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 483 transitions. [2022-04-06 20:45:39,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:45:39,423 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:39,423 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:39,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:39,638 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable284 [2022-04-06 20:45:39,639 INFO L403 AbstractCegarLoop]: === Iteration 286 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:39,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:39,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1242905075, now seen corresponding path program 561 times [2022-04-06 20:45:39,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:39,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [726409012] [2022-04-06 20:45:39,640 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:39,640 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:39,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1242905075, now seen corresponding path program 562 times [2022-04-06 20:45:39,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:39,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770146791] [2022-04-06 20:45:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:39,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:40,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:45:40,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:40,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770146791] [2022-04-06 20:45:40,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770146791] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:40,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009433390] [2022-04-06 20:45:40,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:40,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:40,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:40,007 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:40,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-04-06 20:45:40,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:40,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:40,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:45:40,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:45:40,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:45:41,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009433390] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:41,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:41,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 20:45:41,311 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:41,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [726409012] [2022-04-06 20:45:41,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [726409012] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:41,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:41,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:45:41,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536248690] [2022-04-06 20:45:41,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:41,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:45:41,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:41,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:45:41,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=802, Invalid=4310, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:45:41,312 INFO L87 Difference]: Start difference. First operand 380 states and 483 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:43,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:43,615 INFO L93 Difference]: Finished difference Result 433 states and 536 transitions. [2022-04-06 20:45:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 20:45:43,616 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 20:45:43,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:43,616 INFO L225 Difference]: With dead ends: 433 [2022-04-06 20:45:43,616 INFO L226 Difference]: Without dead ends: 405 [2022-04-06 20:45:43,617 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2634 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3292, Invalid=16168, Unknown=0, NotChecked=0, Total=19460 [2022-04-06 20:45:43,617 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3653 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 3805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 3653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:43,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 196 Invalid, 3805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 3653 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:45:43,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-04-06 20:45:43,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 381. [2022-04-06 20:45:43,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 376 states have (on average 1.2765957446808511) internal successors, (480), 376 states have internal predecessors, (480), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 484 transitions. [2022-04-06 20:45:43,870 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 484 transitions. Word has length 68 [2022-04-06 20:45:43,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:43,870 INFO L478 AbstractCegarLoop]: Abstraction has 381 states and 484 transitions. [2022-04-06 20:45:43,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:43,870 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 484 transitions. [2022-04-06 20:45:43,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:45:43,871 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:43,871 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:43,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:44,086 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:44,087 INFO L403 AbstractCegarLoop]: === Iteration 287 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:44,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:44,087 INFO L85 PathProgramCache]: Analyzing trace with hash 708243839, now seen corresponding path program 563 times [2022-04-06 20:45:44,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:44,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1321583928] [2022-04-06 20:45:44,088 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:44,088 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:44,088 INFO L85 PathProgramCache]: Analyzing trace with hash 708243839, now seen corresponding path program 564 times [2022-04-06 20:45:44,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:44,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541725173] [2022-04-06 20:45:44,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:44,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:44,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:45:44,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:44,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541725173] [2022-04-06 20:45:44,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541725173] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:44,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718076749] [2022-04-06 20:45:44,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:44,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:44,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:44,436 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:44,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-04-06 20:46:00,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 20:46:00,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:00,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:46:00,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:46:01,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:46:01,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718076749] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:01,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:01,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 20:46:01,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:01,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1321583928] [2022-04-06 20:46:01,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1321583928] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:01,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:01,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:46:01,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555897234] [2022-04-06 20:46:01,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:01,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:46:01,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:01,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:46:01,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=4027, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:46:01,997 INFO L87 Difference]: Start difference. First operand 381 states and 484 transitions. Second operand has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:03,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:03,815 INFO L93 Difference]: Finished difference Result 436 states and 539 transitions. [2022-04-06 20:46:03,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:46:03,815 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 20:46:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:03,815 INFO L225 Difference]: With dead ends: 436 [2022-04-06 20:46:03,815 INFO L226 Difference]: Without dead ends: 407 [2022-04-06 20:46:03,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2258 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3053, Invalid=14503, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:46:03,816 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3488 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 3632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:03,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 193 Invalid, 3632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 3488 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:46:03,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-04-06 20:46:04,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 382. [2022-04-06 20:46:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 377 states have (on average 1.2758620689655173) internal successors, (481), 377 states have internal predecessors, (481), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:04,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 485 transitions. [2022-04-06 20:46:04,062 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 485 transitions. Word has length 68 [2022-04-06 20:46:04,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:04,062 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 485 transitions. [2022-04-06 20:46:04,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:04,062 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 485 transitions. [2022-04-06 20:46:04,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:46:04,063 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:04,063 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:04,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:04,269 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:04,269 INFO L403 AbstractCegarLoop]: === Iteration 288 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:04,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:04,269 INFO L85 PathProgramCache]: Analyzing trace with hash -619182067, now seen corresponding path program 565 times [2022-04-06 20:46:04,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:04,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1610189981] [2022-04-06 20:46:04,270 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:04,270 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:04,270 INFO L85 PathProgramCache]: Analyzing trace with hash -619182067, now seen corresponding path program 566 times [2022-04-06 20:46:04,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:04,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525992946] [2022-04-06 20:46:04,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:04,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:04,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:46:04,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:04,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525992946] [2022-04-06 20:46:04,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525992946] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:04,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785498027] [2022-04-06 20:46:04,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:04,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:04,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:04,705 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:04,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-04-06 20:46:04,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:04,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:04,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:46:04,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:46:04,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:46:06,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785498027] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:06,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:06,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 20:46:06,013 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:06,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1610189981] [2022-04-06 20:46:06,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1610189981] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:06,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:06,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:46:06,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489595830] [2022-04-06 20:46:06,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:06,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:46:06,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:06,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:46:06,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=814, Invalid=3742, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:46:06,014 INFO L87 Difference]: Start difference. First operand 382 states and 485 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:07,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:07,808 INFO L93 Difference]: Finished difference Result 439 states and 542 transitions. [2022-04-06 20:46:07,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:46:07,808 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 20:46:07,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:07,808 INFO L225 Difference]: With dead ends: 439 [2022-04-06 20:46:07,808 INFO L226 Difference]: Without dead ends: 409 [2022-04-06 20:46:07,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2638, Invalid=11882, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:46:07,809 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 57 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2913 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 3036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:07,809 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 170 Invalid, 3036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2913 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:46:07,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-04-06 20:46:08,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 383. [2022-04-06 20:46:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 378 states have (on average 1.2751322751322751) internal successors, (482), 378 states have internal predecessors, (482), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:08,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 486 transitions. [2022-04-06 20:46:08,064 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 486 transitions. Word has length 68 [2022-04-06 20:46:08,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:08,064 INFO L478 AbstractCegarLoop]: Abstraction has 383 states and 486 transitions. [2022-04-06 20:46:08,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 486 transitions. [2022-04-06 20:46:08,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:46:08,065 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:08,065 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:08,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-04-06 20:46:08,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-04-06 20:46:08,279 INFO L403 AbstractCegarLoop]: === Iteration 289 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:08,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:08,280 INFO L85 PathProgramCache]: Analyzing trace with hash -259491969, now seen corresponding path program 567 times [2022-04-06 20:46:08,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:08,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1418515234] [2022-04-06 20:46:08,280 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:08,280 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:08,280 INFO L85 PathProgramCache]: Analyzing trace with hash -259491969, now seen corresponding path program 568 times [2022-04-06 20:46:08,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:08,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294670669] [2022-04-06 20:46:08,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:08,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:08,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 20:46:08,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:08,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294670669] [2022-04-06 20:46:08,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294670669] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:08,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145793760] [2022-04-06 20:46:08,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:08,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:08,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:08,737 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:08,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-04-06 20:46:08,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:08,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:08,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:46:08,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 20:46:08,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 20:46:10,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145793760] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:10,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:10,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:46:10,132 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:10,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1418515234] [2022-04-06 20:46:10,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1418515234] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:10,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:10,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:46:10,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482234867] [2022-04-06 20:46:10,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:10,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:46:10,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:10,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:46:10,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3455, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:46:10,133 INFO L87 Difference]: Start difference. First operand 383 states and 486 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:11,799 INFO L93 Difference]: Finished difference Result 442 states and 545 transitions. [2022-04-06 20:46:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:46:11,799 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 20:46:11,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:11,800 INFO L225 Difference]: With dead ends: 442 [2022-04-06 20:46:11,800 INFO L226 Difference]: Without dead ends: 411 [2022-04-06 20:46:11,800 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2185, Invalid=9157, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:46:11,800 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 3120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:11,800 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 190 Invalid, 3120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:46:11,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-04-06 20:46:12,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 384. [2022-04-06 20:46:12,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 379 states have (on average 1.274406332453826) internal successors, (483), 379 states have internal predecessors, (483), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:12,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 487 transitions. [2022-04-06 20:46:12,051 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 487 transitions. Word has length 68 [2022-04-06 20:46:12,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:12,051 INFO L478 AbstractCegarLoop]: Abstraction has 384 states and 487 transitions. [2022-04-06 20:46:12,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 487 transitions. [2022-04-06 20:46:12,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:46:12,051 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:12,051 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:12,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:12,260 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-04-06 20:46:12,260 INFO L403 AbstractCegarLoop]: === Iteration 290 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:12,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:12,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1070614003, now seen corresponding path program 569 times [2022-04-06 20:46:12,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:12,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [736717963] [2022-04-06 20:46:12,261 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:12,261 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:12,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1070614003, now seen corresponding path program 570 times [2022-04-06 20:46:12,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:12,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657708264] [2022-04-06 20:46:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:12,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:12,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-04-06 20:46:12,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:12,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657708264] [2022-04-06 20:46:12,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657708264] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:12,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858751191] [2022-04-06 20:46:12,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:12,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:12,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:12,698 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:12,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-04-06 20:46:13,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:46:13,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:13,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:46:13,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 72 proven. 6 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2022-04-06 20:46:13,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 72 proven. 6 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2022-04-06 20:46:13,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858751191] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:13,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:13,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 8, 8] total 42 [2022-04-06 20:46:13,538 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:13,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [736717963] [2022-04-06 20:46:13,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [736717963] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:13,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:13,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:46:13,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796691700] [2022-04-06 20:46:13,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:13,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:46:13,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:13,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:46:13,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1618, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:46:13,539 INFO L87 Difference]: Start difference. First operand 384 states and 487 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:14,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:14,864 INFO L93 Difference]: Finished difference Result 445 states and 548 transitions. [2022-04-06 20:46:14,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:46:14,864 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 20:46:14,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:14,865 INFO L225 Difference]: With dead ends: 445 [2022-04-06 20:46:14,865 INFO L226 Difference]: Without dead ends: 413 [2022-04-06 20:46:14,875 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=281, Invalid=5269, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:46:14,876 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 74 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2728 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:14,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 178 Invalid, 2800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2728 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:46:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-04-06 20:46:15,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 385. [2022-04-06 20:46:15,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 380 states have (on average 1.2736842105263158) internal successors, (484), 380 states have internal predecessors, (484), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 488 transitions. [2022-04-06 20:46:15,131 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 488 transitions. Word has length 68 [2022-04-06 20:46:15,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:15,131 INFO L478 AbstractCegarLoop]: Abstraction has 385 states and 488 transitions. [2022-04-06 20:46:15,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:15,131 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 488 transitions. [2022-04-06 20:46:15,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:46:15,132 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:15,132 INFO L499 BasicCegarLoop]: trace histogram [51, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:15,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:15,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-04-06 20:46:15,335 INFO L403 AbstractCegarLoop]: === Iteration 291 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:15,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1079050030, now seen corresponding path program 571 times [2022-04-06 20:46:15,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:15,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [719168531] [2022-04-06 20:46:15,336 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:15,336 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:15,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1079050030, now seen corresponding path program 572 times [2022-04-06 20:46:15,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:15,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421769774] [2022-04-06 20:46:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:15,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:16,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 1327 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:16,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:16,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421769774] [2022-04-06 20:46:16,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421769774] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:16,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980006283] [2022-04-06 20:46:16,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:16,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:16,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:16,145 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:16,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-04-06 20:46:16,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:16,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:16,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 109 conjunts are in the unsatisfiable core [2022-04-06 20:46:16,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 1327 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:16,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 1327 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:19,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980006283] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:19,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:19,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-04-06 20:46:19,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:19,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [719168531] [2022-04-06 20:46:19,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [719168531] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:19,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:19,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 20:46:19,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173223032] [2022-04-06 20:46:19,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:19,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 20:46:19,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:19,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 20:46:19,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2931, Invalid=9501, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:46:19,003 INFO L87 Difference]: Start difference. First operand 385 states and 488 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:22,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:22,986 INFO L93 Difference]: Finished difference Result 655 states and 982 transitions. [2022-04-06 20:46:22,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:46:22,986 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 20:46:22,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:22,987 INFO L225 Difference]: With dead ends: 655 [2022-04-06 20:46:22,987 INFO L226 Difference]: Without dead ends: 647 [2022-04-06 20:46:22,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6023, Invalid=21699, Unknown=0, NotChecked=0, Total=27722 [2022-04-06 20:46:22,988 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 283 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 12887 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 13102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 12887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:22,988 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 377 Invalid, 13102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 12887 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 20:46:22,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-04-06 20:46:23,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 391. [2022-04-06 20:46:23,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 386 states have (on average 1.2746113989637307) internal successors, (492), 386 states have internal predecessors, (492), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:23,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 496 transitions. [2022-04-06 20:46:23,252 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 496 transitions. Word has length 68 [2022-04-06 20:46:23,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:23,253 INFO L478 AbstractCegarLoop]: Abstraction has 391 states and 496 transitions. [2022-04-06 20:46:23,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:23,253 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 496 transitions. [2022-04-06 20:46:23,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:46:23,253 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:23,253 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:23,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-04-06 20:46:23,469 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:23,469 INFO L403 AbstractCegarLoop]: === Iteration 292 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:23,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:23,469 INFO L85 PathProgramCache]: Analyzing trace with hash 645751471, now seen corresponding path program 573 times [2022-04-06 20:46:23,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:23,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2042696808] [2022-04-06 20:46:23,470 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:23,470 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:23,470 INFO L85 PathProgramCache]: Analyzing trace with hash 645751471, now seen corresponding path program 574 times [2022-04-06 20:46:23,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:23,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029270191] [2022-04-06 20:46:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:23,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:23,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:46:23,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:23,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029270191] [2022-04-06 20:46:23,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029270191] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:23,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456743018] [2022-04-06 20:46:23,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:23,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:23,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:23,902 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:23,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-04-06 20:46:23,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:23,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:23,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 114 conjunts are in the unsatisfiable core [2022-04-06 20:46:23,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:46:24,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:26,332 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-04-06 20:46:26,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456743018] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:26,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:26,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 98 [2022-04-06 20:46:26,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:26,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2042696808] [2022-04-06 20:46:26,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2042696808] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:26,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:26,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:46:26,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432738175] [2022-04-06 20:46:26,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:26,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:46:26,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:26,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:46:26,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1314, Invalid=8192, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:46:26,334 INFO L87 Difference]: Start difference. First operand 391 states and 496 transitions. Second operand has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:27,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:27,640 INFO L93 Difference]: Finished difference Result 415 states and 519 transitions. [2022-04-06 20:46:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:46:27,640 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 20:46:27,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:27,641 INFO L225 Difference]: With dead ends: 415 [2022-04-06 20:46:27,641 INFO L226 Difference]: Without dead ends: 370 [2022-04-06 20:46:27,641 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3325 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2568, Invalid=15792, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 20:46:27,642 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:27,642 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 206 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:46:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-04-06 20:46:27,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2022-04-06 20:46:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.284931506849315) internal successors, (469), 365 states have internal predecessors, (469), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:27,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 473 transitions. [2022-04-06 20:46:27,883 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 473 transitions. Word has length 69 [2022-04-06 20:46:27,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:27,883 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 473 transitions. [2022-04-06 20:46:27,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 473 transitions. [2022-04-06 20:46:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:46:27,883 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:27,883 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:27,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:28,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2022-04-06 20:46:28,099 INFO L403 AbstractCegarLoop]: === Iteration 293 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:28,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:28,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2124100095, now seen corresponding path program 575 times [2022-04-06 20:46:28,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:28,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1139135844] [2022-04-06 20:46:28,100 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:28,101 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:28,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2124100095, now seen corresponding path program 576 times [2022-04-06 20:46:28,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:28,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836277660] [2022-04-06 20:46:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:28,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:28,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:46:28,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:28,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836277660] [2022-04-06 20:46:28,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836277660] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:28,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380064036] [2022-04-06 20:46:28,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:28,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:28,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:28,766 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:28,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-04-06 20:46:32,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 20:46:32,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:32,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 112 conjunts are in the unsatisfiable core [2022-04-06 20:46:32,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:46:32,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 36 proven. 306 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-04-06 20:46:34,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380064036] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:34,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:34,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 38] total 95 [2022-04-06 20:46:34,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:34,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1139135844] [2022-04-06 20:46:34,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1139135844] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:34,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:34,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:46:34,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699281243] [2022-04-06 20:46:34,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:34,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:46:34,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:34,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:46:34,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=8018, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:46:34,168 INFO L87 Difference]: Start difference. First operand 370 states and 473 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:35,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:35,769 INFO L93 Difference]: Finished difference Result 417 states and 520 transitions. [2022-04-06 20:46:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:46:35,769 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 20:46:35,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:35,770 INFO L225 Difference]: With dead ends: 417 [2022-04-06 20:46:35,770 INFO L226 Difference]: Without dead ends: 392 [2022-04-06 20:46:35,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3108 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1480, Invalid=16076, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:46:35,776 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 2593 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:35,777 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 208 Invalid, 2671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:46:35,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-04-06 20:46:36,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 371. [2022-04-06 20:46:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 366 states have (on average 1.284153005464481) internal successors, (470), 366 states have internal predecessors, (470), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:36,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 474 transitions. [2022-04-06 20:46:36,015 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 474 transitions. Word has length 69 [2022-04-06 20:46:36,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:36,015 INFO L478 AbstractCegarLoop]: Abstraction has 371 states and 474 transitions. [2022-04-06 20:46:36,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:36,016 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 474 transitions. [2022-04-06 20:46:36,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:46:36,016 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:36,016 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:36,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:36,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:36,219 INFO L403 AbstractCegarLoop]: === Iteration 294 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:36,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:36,220 INFO L85 PathProgramCache]: Analyzing trace with hash 354275567, now seen corresponding path program 577 times [2022-04-06 20:46:36,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:36,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [79545953] [2022-04-06 20:46:36,220 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:36,220 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:36,220 INFO L85 PathProgramCache]: Analyzing trace with hash 354275567, now seen corresponding path program 578 times [2022-04-06 20:46:36,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:36,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176184389] [2022-04-06 20:46:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:36,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:36,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:46:36,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:36,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176184389] [2022-04-06 20:46:36,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176184389] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:36,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240772363] [2022-04-06 20:46:36,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:36,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:36,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:36,884 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:36,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-04-06 20:46:36,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:36,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:36,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 20:46:36,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:46:37,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:46:38,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240772363] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:38,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:38,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-06 20:46:38,307 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:38,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [79545953] [2022-04-06 20:46:38,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [79545953] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:38,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:38,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:46:38,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88065593] [2022-04-06 20:46:38,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:38,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:46:38,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:38,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:46:38,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=5162, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:46:38,308 INFO L87 Difference]: Start difference. First operand 371 states and 474 transitions. Second operand has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:40,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:40,346 INFO L93 Difference]: Finished difference Result 420 states and 523 transitions. [2022-04-06 20:46:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:46:40,347 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 20:46:40,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:40,347 INFO L225 Difference]: With dead ends: 420 [2022-04-06 20:46:40,347 INFO L226 Difference]: Without dead ends: 394 [2022-04-06 20:46:40,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2702, Invalid=14068, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:46:40,348 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:40,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 135 Invalid, 2462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2353 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:46:40,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-04-06 20:46:40,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 372. [2022-04-06 20:46:40,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 367 states have (on average 1.2833787465940054) internal successors, (471), 367 states have internal predecessors, (471), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:40,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 475 transitions. [2022-04-06 20:46:40,591 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 475 transitions. Word has length 69 [2022-04-06 20:46:40,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:40,591 INFO L478 AbstractCegarLoop]: Abstraction has 372 states and 475 transitions. [2022-04-06 20:46:40,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:40,592 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 475 transitions. [2022-04-06 20:46:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:46:40,592 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:40,592 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:40,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:40,806 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:40,806 INFO L403 AbstractCegarLoop]: === Iteration 295 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:40,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1728512959, now seen corresponding path program 579 times [2022-04-06 20:46:40,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:40,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1647456459] [2022-04-06 20:46:40,807 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:40,807 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:40,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1728512959, now seen corresponding path program 580 times [2022-04-06 20:46:40,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:40,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914650483] [2022-04-06 20:46:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:40,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:41,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:46:41,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:41,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914650483] [2022-04-06 20:46:41,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914650483] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:41,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518184928] [2022-04-06 20:46:41,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:41,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:41,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:41,365 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:41,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-04-06 20:46:41,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:41,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:41,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:46:41,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:46:41,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:46:42,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518184928] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:42,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:42,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 20:46:42,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:42,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1647456459] [2022-04-06 20:46:42,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1647456459] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:42,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:42,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:46:42,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308504148] [2022-04-06 20:46:42,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:42,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:46:42,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:42,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:46:42,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=4869, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:46:42,569 INFO L87 Difference]: Start difference. First operand 372 states and 475 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:44,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:44,717 INFO L93 Difference]: Finished difference Result 423 states and 526 transitions. [2022-04-06 20:46:44,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 20:46:44,718 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 20:46:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:44,718 INFO L225 Difference]: With dead ends: 423 [2022-04-06 20:46:44,718 INFO L226 Difference]: Without dead ends: 396 [2022-04-06 20:46:44,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2348 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3066, Invalid=15566, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 20:46:44,719 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2922 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 3051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:44,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 157 Invalid, 3051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2922 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:46:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-04-06 20:46:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 373. [2022-04-06 20:46:44,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 368 states have (on average 1.2826086956521738) internal successors, (472), 368 states have internal predecessors, (472), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:44,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 476 transitions. [2022-04-06 20:46:44,966 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 476 transitions. Word has length 69 [2022-04-06 20:46:44,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:44,966 INFO L478 AbstractCegarLoop]: Abstraction has 373 states and 476 transitions. [2022-04-06 20:46:44,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 476 transitions. [2022-04-06 20:46:44,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:46:44,967 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:44,967 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:44,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:45,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:45,176 INFO L403 AbstractCegarLoop]: === Iteration 296 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:45,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:45,176 INFO L85 PathProgramCache]: Analyzing trace with hash 561954607, now seen corresponding path program 581 times [2022-04-06 20:46:45,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:45,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2047353498] [2022-04-06 20:46:45,176 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:45,177 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:45,177 INFO L85 PathProgramCache]: Analyzing trace with hash 561954607, now seen corresponding path program 582 times [2022-04-06 20:46:45,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:45,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321789085] [2022-04-06 20:46:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:45,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:45,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:46:45,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:45,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321789085] [2022-04-06 20:46:45,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321789085] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:45,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007438181] [2022-04-06 20:46:45,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:45,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:45,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:45,747 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:45,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-04-06 20:46:52,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 20:46:52,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:52,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:46:52,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:46:52,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:46:54,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007438181] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:54,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:54,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-04-06 20:46:54,078 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:54,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2047353498] [2022-04-06 20:46:54,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2047353498] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:54,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:54,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:46:54,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169481777] [2022-04-06 20:46:54,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:54,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:46:54,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:54,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:46:54,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=4574, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:46:54,080 INFO L87 Difference]: Start difference. First operand 373 states and 476 transitions. Second operand has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:56,064 INFO L93 Difference]: Finished difference Result 426 states and 529 transitions. [2022-04-06 20:46:56,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:46:56,064 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 20:46:56,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:56,065 INFO L225 Difference]: With dead ends: 426 [2022-04-06 20:46:56,065 INFO L226 Difference]: Without dead ends: 398 [2022-04-06 20:46:56,065 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3231, Invalid=15951, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 20:46:56,066 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3279 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 3279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:56,066 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 174 Invalid, 3422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 3279 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:46:56,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-04-06 20:46:56,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 374. [2022-04-06 20:46:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 369 states have (on average 1.2818428184281843) internal successors, (473), 369 states have internal predecessors, (473), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:56,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 477 transitions. [2022-04-06 20:46:56,309 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 477 transitions. Word has length 69 [2022-04-06 20:46:56,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:56,309 INFO L478 AbstractCegarLoop]: Abstraction has 374 states and 477 transitions. [2022-04-06 20:46:56,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:56,309 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 477 transitions. [2022-04-06 20:46:56,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:46:56,335 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:56,335 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:56,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:56,540 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:56,541 INFO L403 AbstractCegarLoop]: === Iteration 297 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:56,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:56,541 INFO L85 PathProgramCache]: Analyzing trace with hash 117462399, now seen corresponding path program 583 times [2022-04-06 20:46:56,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:56,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1152862417] [2022-04-06 20:46:56,542 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:56,542 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:56,542 INFO L85 PathProgramCache]: Analyzing trace with hash 117462399, now seen corresponding path program 584 times [2022-04-06 20:46:56,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:56,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221287714] [2022-04-06 20:46:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:56,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:57,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:46:57,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:57,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221287714] [2022-04-06 20:46:57,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221287714] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:57,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597603772] [2022-04-06 20:46:57,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:57,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:57,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:57,085 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:57,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-04-06 20:46:57,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:57,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:57,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:46:57,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:46:57,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:46:58,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597603772] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:58,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:58,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 20:46:58,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:58,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1152862417] [2022-04-06 20:46:58,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1152862417] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:58,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:58,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:46:58,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044922796] [2022-04-06 20:46:58,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:58,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:46:58,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:58,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:46:58,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=4285, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:46:58,232 INFO L87 Difference]: Start difference. First operand 374 states and 477 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:00,046 INFO L93 Difference]: Finished difference Result 429 states and 532 transitions. [2022-04-06 20:47:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:47:00,046 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 20:47:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:00,046 INFO L225 Difference]: With dead ends: 429 [2022-04-06 20:47:00,046 INFO L226 Difference]: Without dead ends: 400 [2022-04-06 20:47:00,047 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2355 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3159, Invalid=15201, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 20:47:00,047 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3426 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:00,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 186 Invalid, 3570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 3426 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:47:00,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-04-06 20:47:00,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 375. [2022-04-06 20:47:00,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 370 states have (on average 1.281081081081081) internal successors, (474), 370 states have internal predecessors, (474), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 478 transitions. [2022-04-06 20:47:00,296 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 478 transitions. Word has length 69 [2022-04-06 20:47:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:00,296 INFO L478 AbstractCegarLoop]: Abstraction has 375 states and 478 transitions. [2022-04-06 20:47:00,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 478 transitions. [2022-04-06 20:47:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:47:00,297 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:00,297 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:00,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-04-06 20:47:00,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:00,510 INFO L403 AbstractCegarLoop]: === Iteration 298 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:00,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:00,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1425789585, now seen corresponding path program 585 times [2022-04-06 20:47:00,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:00,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1304940930] [2022-04-06 20:47:00,511 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:00,511 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:00,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1425789585, now seen corresponding path program 586 times [2022-04-06 20:47:00,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:00,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839361096] [2022-04-06 20:47:00,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:00,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:00,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 328 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:47:00,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:00,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839361096] [2022-04-06 20:47:00,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839361096] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:00,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315622524] [2022-04-06 20:47:00,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:00,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:00,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:00,995 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:00,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-04-06 20:47:01,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:01,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:01,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:47:01,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 328 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:47:01,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 328 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:47:02,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315622524] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:02,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:02,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 20:47:02,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:02,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1304940930] [2022-04-06 20:47:02,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1304940930] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:02,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:02,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:47:02,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561803994] [2022-04-06 20:47:02,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:02,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:47:02,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:02,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:47:02,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=3996, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:47:02,255 INFO L87 Difference]: Start difference. First operand 375 states and 478 transitions. Second operand has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:03,910 INFO L93 Difference]: Finished difference Result 432 states and 535 transitions. [2022-04-06 20:47:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:47:03,910 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 20:47:03,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:03,910 INFO L225 Difference]: With dead ends: 432 [2022-04-06 20:47:03,910 INFO L226 Difference]: Without dead ends: 402 [2022-04-06 20:47:03,911 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1941 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2892, Invalid=13364, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 20:47:03,911 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3084 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 3219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 3084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:03,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 173 Invalid, 3219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 3084 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:47:03,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-04-06 20:47:04,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 376. [2022-04-06 20:47:04,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 371 states have (on average 1.280323450134771) internal successors, (475), 371 states have internal predecessors, (475), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 479 transitions. [2022-04-06 20:47:04,162 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 479 transitions. Word has length 69 [2022-04-06 20:47:04,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:04,162 INFO L478 AbstractCegarLoop]: Abstraction has 376 states and 479 transitions. [2022-04-06 20:47:04,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:04,162 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 479 transitions. [2022-04-06 20:47:04,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:47:04,163 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:04,163 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:04,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:04,378 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:04,378 INFO L403 AbstractCegarLoop]: === Iteration 299 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:04,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:04,379 INFO L85 PathProgramCache]: Analyzing trace with hash 589506367, now seen corresponding path program 587 times [2022-04-06 20:47:04,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:04,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [993640515] [2022-04-06 20:47:04,379 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:04,379 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:04,380 INFO L85 PathProgramCache]: Analyzing trace with hash 589506367, now seen corresponding path program 588 times [2022-04-06 20:47:04,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:04,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278667418] [2022-04-06 20:47:04,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:04,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:04,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 340 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 20:47:04,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:04,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278667418] [2022-04-06 20:47:04,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278667418] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:04,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460261177] [2022-04-06 20:47:04,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:47:04,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:04,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:04,769 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:04,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-04-06 20:47:09,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 20:47:09,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:09,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:47:09,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 120 proven. 30 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2022-04-06 20:47:09,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 123 proven. 27 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2022-04-06 20:47:10,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460261177] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:10,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:10,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 14, 14] total 58 [2022-04-06 20:47:10,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:10,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [993640515] [2022-04-06 20:47:10,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [993640515] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:10,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:10,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:47:10,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263761546] [2022-04-06 20:47:10,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:10,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:47:10,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:10,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:47:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=3060, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:47:10,777 INFO L87 Difference]: Start difference. First operand 376 states and 479 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:12,852 INFO L93 Difference]: Finished difference Result 435 states and 538 transitions. [2022-04-06 20:47:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:47:12,853 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 20:47:12,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:12,853 INFO L225 Difference]: With dead ends: 435 [2022-04-06 20:47:12,853 INFO L226 Difference]: Without dead ends: 404 [2022-04-06 20:47:12,854 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=685, Invalid=10235, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:47:12,854 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 57 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2967 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 3073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:12,854 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 181 Invalid, 3073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2967 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:47:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-04-06 20:47:13,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 377. [2022-04-06 20:47:13,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 372 states have (on average 1.2795698924731183) internal successors, (476), 372 states have internal predecessors, (476), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 480 transitions. [2022-04-06 20:47:13,100 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 480 transitions. Word has length 69 [2022-04-06 20:47:13,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:13,100 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 480 transitions. [2022-04-06 20:47:13,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:13,100 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 480 transitions. [2022-04-06 20:47:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:47:13,101 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:13,101 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:13,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:13,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-04-06 20:47:13,305 INFO L403 AbstractCegarLoop]: === Iteration 300 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:13,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:13,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1494358959, now seen corresponding path program 589 times [2022-04-06 20:47:13,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:13,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1233868215] [2022-04-06 20:47:13,306 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:13,306 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:13,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1494358959, now seen corresponding path program 590 times [2022-04-06 20:47:13,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:13,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609785160] [2022-04-06 20:47:13,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:13,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:13,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 357 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-04-06 20:47:13,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:13,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609785160] [2022-04-06 20:47:13,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609785160] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:13,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938604111] [2022-04-06 20:47:13,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:13,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:13,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:13,630 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:13,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-04-06 20:47:13,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:13,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:13,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:47:13,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 357 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-04-06 20:47:13,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 357 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-04-06 20:47:14,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938604111] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:14,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:14,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:47:14,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:14,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1233868215] [2022-04-06 20:47:14,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1233868215] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:14,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:14,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:47:14,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759095547] [2022-04-06 20:47:14,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:14,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:47:14,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:14,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:47:14,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:47:14,651 INFO L87 Difference]: Start difference. First operand 377 states and 480 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:15,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:15,971 INFO L93 Difference]: Finished difference Result 438 states and 541 transitions. [2022-04-06 20:47:15,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:47:15,971 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 20:47:15,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:15,971 INFO L225 Difference]: With dead ends: 438 [2022-04-06 20:47:15,971 INFO L226 Difference]: Without dead ends: 406 [2022-04-06 20:47:15,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2093, Invalid=8413, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:47:15,972 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2830 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:15,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 181 Invalid, 2912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2830 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:47:15,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-04-06 20:47:16,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 378. [2022-04-06 20:47:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 373 states have (on average 1.2788203753351206) internal successors, (477), 373 states have internal predecessors, (477), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 481 transitions. [2022-04-06 20:47:16,226 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 481 transitions. Word has length 69 [2022-04-06 20:47:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:16,226 INFO L478 AbstractCegarLoop]: Abstraction has 378 states and 481 transitions. [2022-04-06 20:47:16,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:16,226 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 481 transitions. [2022-04-06 20:47:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:47:16,227 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:16,227 INFO L499 BasicCegarLoop]: trace histogram [52, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:16,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-04-06 20:47:16,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:16,431 INFO L403 AbstractCegarLoop]: === Iteration 301 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:16,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:16,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1452738609, now seen corresponding path program 591 times [2022-04-06 20:47:16,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:16,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1664351572] [2022-04-06 20:47:16,432 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:16,432 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:16,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1452738609, now seen corresponding path program 592 times [2022-04-06 20:47:16,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:16,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34116475] [2022-04-06 20:47:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:16,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:17,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1382 backedges. 0 proven. 1379 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:17,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:17,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34116475] [2022-04-06 20:47:17,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34116475] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:17,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041609784] [2022-04-06 20:47:17,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:17,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:17,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:17,541 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:17,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-04-06 20:47:17,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:17,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:17,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 111 conjunts are in the unsatisfiable core [2022-04-06 20:47:17,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1382 backedges. 0 proven. 1379 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:17,796 INFO L328 TraceCheckSpWp]: Computing backward predicates...