/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:14:48,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:14:48,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:14:48,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:14:48,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 00:14:48,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 00:14:48,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 00:14:48,768 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:14:48,783 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:14:48,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:14:48,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:14:48,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:14:48,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:14:48,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:14:48,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:14:48,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:14:48,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:14:48,787 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:14:48,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:14:48,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:14:48,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:14:48,787 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:14:48,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:14:48,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:14:48,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:14:48,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:14:48,788 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:14:48,788 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:14:48,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:14:48,788 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:14:48,788 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:14:49,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:14:49,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:14:49,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:14:49,049 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:14:49,050 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:14:49,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2022-03-18 00:14:49,123 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0423e521/9754981f481b4a66b4fa78e71d2a682d/FLAG02ef6dc89 [2022-03-18 00:14:49,507 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:14:49,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i [2022-03-18 00:14:49,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0423e521/9754981f481b4a66b4fa78e71d2a682d/FLAG02ef6dc89 [2022-03-18 00:14:49,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0423e521/9754981f481b4a66b4fa78e71d2a682d [2022-03-18 00:14:49,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:14:49,527 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:14:49,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:14:49,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:14:49,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:14:49,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:14:49" (1/1) ... [2022-03-18 00:14:49,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@747ccbba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:49, skipping insertion in model container [2022-03-18 00:14:49,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:14:49" (1/1) ... [2022-03-18 00:14:49,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:14:49,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:14:49,769 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i[848,861] [2022-03-18 00:14:49,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:14:49,798 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:14:49,809 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i[848,861] [2022-03-18 00:14:49,815 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:14:49,830 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:14:49,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:49 WrapperNode [2022-03-18 00:14:49,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:14:49,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:14:49,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:14:49,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:14:49,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:49" (1/1) ... [2022-03-18 00:14:49,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:49" (1/1) ... [2022-03-18 00:14:49,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:49" (1/1) ... [2022-03-18 00:14:49,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:49" (1/1) ... [2022-03-18 00:14:49,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:49" (1/1) ... [2022-03-18 00:14:49,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:49" (1/1) ... [2022-03-18 00:14:49,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:49" (1/1) ... [2022-03-18 00:14:49,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:14:49,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:14:49,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:14:49,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:14:49,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:49" (1/1) ... [2022-03-18 00:14:49,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:14:49,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:14:49,917 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 00:14:49,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 00:14:49,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:14:49,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:14:49,965 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:14:49,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:14:49,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:14:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:14:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:14:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 00:14:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 00:14:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:14:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:14:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 00:14:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:14:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:14:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-18 00:14:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:14:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:14:49,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:14:49,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:14:49,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:14:49,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:14:50,047 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:14:50,048 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:14:50,189 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:14:50,198 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:14:50,198 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 00:14:50,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:14:50 BoogieIcfgContainer [2022-03-18 00:14:50,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:14:50,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:14:50,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:14:50,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:14:50,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:14:49" (1/3) ... [2022-03-18 00:14:50,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d669d15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:14:50, skipping insertion in model container [2022-03-18 00:14:50,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:49" (2/3) ... [2022-03-18 00:14:50,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d669d15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:14:50, skipping insertion in model container [2022-03-18 00:14:50,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:14:50" (3/3) ... [2022-03-18 00:14:50,219 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.i [2022-03-18 00:14:50,223 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:14:50,223 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:14:50,259 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:14:50,265 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 00:14:50,266 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:14:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 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) [2022-03-18 00:14:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 00:14:50,285 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:14:50,286 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:14:50,287 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:14:50,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:14:50,294 INFO L85 PathProgramCache]: Analyzing trace with hash -615726646, now seen corresponding path program 1 times [2022-03-18 00:14:50,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:50,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1104445290] [2022-03-18 00:14:50,315 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:14:50,316 INFO L85 PathProgramCache]: Analyzing trace with hash -615726646, now seen corresponding path program 2 times [2022-03-18 00:14:50,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:14:50,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461354354] [2022-03-18 00:14:50,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:14:50,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:14:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:50,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:14:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:14:50,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:14:50,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461354354] [2022-03-18 00:14:50,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461354354] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:50,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:50,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:14:50,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:14:50,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1104445290] [2022-03-18 00:14:50,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1104445290] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:50,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:50,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:14:50,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626253881] [2022-03-18 00:14:50,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:14:50,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 00:14:50,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:50,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 00:14:50,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:14:50,589 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 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 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:14:50,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:14:50,653 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-03-18 00:14:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 00:14:50,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-18 00:14:50,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:14:50,660 INFO L225 Difference]: With dead ends: 40 [2022-03-18 00:14:50,661 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 00:14:50,664 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:14:50,668 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:14:50,670 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:14:50,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 00:14:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-18 00:14:50,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:14:50,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-03-18 00:14:50,713 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2022-03-18 00:14:50,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:14:50,713 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-03-18 00:14:50,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:14:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-03-18 00:14:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 00:14:50,715 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:14:50,715 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:14:50,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:14:50,716 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:14:50,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:14:50,719 INFO L85 PathProgramCache]: Analyzing trace with hash 238110415, now seen corresponding path program 1 times [2022-03-18 00:14:50,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:50,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1666982122] [2022-03-18 00:14:50,721 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:14:50,721 INFO L85 PathProgramCache]: Analyzing trace with hash 238110415, now seen corresponding path program 2 times [2022-03-18 00:14:50,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:14:50,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442150966] [2022-03-18 00:14:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:14:50,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:14:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:50,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:14:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:14:50,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:14:50,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442150966] [2022-03-18 00:14:50,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442150966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:50,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:50,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:14:50,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:14:50,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1666982122] [2022-03-18 00:14:50,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1666982122] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:50,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:50,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:14:50,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434956440] [2022-03-18 00:14:50,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:14:50,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 00:14:50,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:50,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 00:14:50,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 00:14:50,840 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-03-18 00:14:50,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:14:50,901 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-03-18 00:14:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:14:50,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2022-03-18 00:14:50,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:14:50,905 INFO L225 Difference]: With dead ends: 32 [2022-03-18 00:14:50,905 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 00:14:50,906 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:14:50,910 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:14:50,911 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:14:50,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 00:14:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2022-03-18 00:14:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2022-03-18 00:14:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-03-18 00:14:50,933 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2022-03-18 00:14:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:14:50,933 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-03-18 00:14:50,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-03-18 00:14:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-03-18 00:14:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 00:14:50,935 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:14:50,935 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:14:50,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 00:14:50,935 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:14:50,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:14:50,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1502803825, now seen corresponding path program 1 times [2022-03-18 00:14:50,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:50,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [89910680] [2022-03-18 00:14:50,945 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:14:50,945 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:14:50,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1502803825, now seen corresponding path program 2 times [2022-03-18 00:14:50,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:14:50,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843781377] [2022-03-18 00:14:50,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:14:50,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:14:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:51,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:14:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:14:51,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:14:51,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843781377] [2022-03-18 00:14:51,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843781377] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:14:51,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510818119] [2022-03-18 00:14:51,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:14:51,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:51,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:14:51,032 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:14:51,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 00:14:51,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 00:14:51,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:14:51,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:14:51,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:14:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:14:51,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 00:14:51,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510818119] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:51,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 00:14:51,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-03-18 00:14:51,220 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:14:51,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [89910680] [2022-03-18 00:14:51,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [89910680] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:51,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:51,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:14:51,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062850021] [2022-03-18 00:14:51,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:14:51,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:14:51,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:51,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:14:51,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 00:14:51,222 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) 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) [2022-03-18 00:14:51,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:14:51,253 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2022-03-18 00:14:51,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:14:51,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) 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 [2022-03-18 00:14:51,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:14:51,254 INFO L225 Difference]: With dead ends: 27 [2022-03-18 00:14:51,254 INFO L226 Difference]: Without dead ends: 22 [2022-03-18 00:14:51,255 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 00:14:51,255 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:14:51,256 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 47 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:14:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-18 00:14:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-03-18 00:14:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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) [2022-03-18 00:14:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-03-18 00:14:51,261 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2022-03-18 00:14:51,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:14:51,261 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-03-18 00:14:51,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) 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) [2022-03-18 00:14:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-03-18 00:14:51,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 00:14:51,262 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:14:51,262 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:14:51,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 00:14:51,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:51,488 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:14:51,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:14:51,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1018715970, now seen corresponding path program 1 times [2022-03-18 00:14:51,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:51,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1889354305] [2022-03-18 00:14:51,491 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:14:51,492 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:14:51,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1018715970, now seen corresponding path program 2 times [2022-03-18 00:14:51,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:14:51,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513550478] [2022-03-18 00:14:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:14:51,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:14:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:51,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:14:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 00:14:51,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:14:51,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513550478] [2022-03-18 00:14:51,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513550478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:14:51,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889774377] [2022-03-18 00:14:51,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:14:51,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:51,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:14:51,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:14:51,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 00:14:51,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:14:51,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:14:51,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 00:14:51,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:14:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 00:14:51,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:14:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 00:14:51,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889774377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:14:51,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:14:51,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 00:14:51,732 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:14:51,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1889354305] [2022-03-18 00:14:51,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1889354305] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:51,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:51,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:14:51,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474430478] [2022-03-18 00:14:51,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:14:51,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:14:51,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:51,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:14:51,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 00:14:51,734 INFO L87 Difference]: Start difference. First operand 20 states and 21 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) [2022-03-18 00:14:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:14:51,793 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-03-18 00:14:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:14:51,794 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 19 [2022-03-18 00:14:51,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:14:51,794 INFO L225 Difference]: With dead ends: 39 [2022-03-18 00:14:51,795 INFO L226 Difference]: Without dead ends: 28 [2022-03-18 00:14:51,795 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 00:14:51,796 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:14:51,796 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 21 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:14:51,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-18 00:14:51,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-03-18 00:14:51,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 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) [2022-03-18 00:14:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-03-18 00:14:51,826 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2022-03-18 00:14:51,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:14:51,826 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-03-18 00:14:51,826 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) [2022-03-18 00:14:51,827 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-03-18 00:14:51,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 00:14:51,827 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:14:51,827 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:14:51,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 00:14:52,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 00:14:52,044 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:14:52,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:14:52,044 INFO L85 PathProgramCache]: Analyzing trace with hash -706411172, now seen corresponding path program 3 times [2022-03-18 00:14:52,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:52,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [393286513] [2022-03-18 00:14:52,046 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:14:52,047 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:14:52,047 INFO L85 PathProgramCache]: Analyzing trace with hash -706411172, now seen corresponding path program 4 times [2022-03-18 00:14:52,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:14:52,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235498800] [2022-03-18 00:14:52,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:14:52,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:14:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:52,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:14:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 00:14:52,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:14:52,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235498800] [2022-03-18 00:14:52,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235498800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:14:52,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097204764] [2022-03-18 00:14:52,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:14:52,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:52,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:14:52,134 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:14:52,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 00:14:52,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:14:52,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:14:52,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:14:52,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:14:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 00:14:52,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:14:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 00:14:52,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097204764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:14:52,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:14:52,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2022-03-18 00:14:52,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:14:52,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [393286513] [2022-03-18 00:14:52,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [393286513] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:52,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:52,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:14:52,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758043334] [2022-03-18 00:14:52,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:14:52,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 00:14:52,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:52,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 00:14:52,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-18 00:14:52,328 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 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) [2022-03-18 00:14:52,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:14:52,433 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-03-18 00:14:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 00:14:52,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 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 21 [2022-03-18 00:14:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:14:52,434 INFO L225 Difference]: With dead ends: 32 [2022-03-18 00:14:52,434 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 00:14:52,435 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-03-18 00:14:52,436 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:14:52,436 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 30 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:14:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 00:14:52,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-03-18 00:14:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:14:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-03-18 00:14:52,442 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2022-03-18 00:14:52,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:14:52,442 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-03-18 00:14:52,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 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) [2022-03-18 00:14:52,443 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-03-18 00:14:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 00:14:52,443 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:14:52,443 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:14:52,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-18 00:14:52,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:52,660 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:14:52,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:14:52,660 INFO L85 PathProgramCache]: Analyzing trace with hash 336152307, now seen corresponding path program 5 times [2022-03-18 00:14:52,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:52,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1125531704] [2022-03-18 00:14:52,662 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:14:52,662 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:14:52,662 INFO L85 PathProgramCache]: Analyzing trace with hash 336152307, now seen corresponding path program 6 times [2022-03-18 00:14:52,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:14:52,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769511556] [2022-03-18 00:14:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:14:52,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:14:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:52,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:14:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:52,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:14:52,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769511556] [2022-03-18 00:14:52,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769511556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:14:52,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832705794] [2022-03-18 00:14:52,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:14:52,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:52,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:14:52,735 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:14:52,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 00:14:52,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 00:14:52,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:14:52,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:14:52,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:14:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 00:14:52,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:14:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 00:14:52,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832705794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:14:52,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:14:52,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-03-18 00:14:52,983 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:14:52,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1125531704] [2022-03-18 00:14:52,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1125531704] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:52,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:52,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:14:52,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823289330] [2022-03-18 00:14:52,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:14:52,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 00:14:52,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:52,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 00:14:52,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-18 00:14:52,985 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2022-03-18 00:14:53,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:14:53,057 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-03-18 00:14:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 00:14:53,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 24 [2022-03-18 00:14:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:14:53,059 INFO L225 Difference]: With dead ends: 47 [2022-03-18 00:14:53,059 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 00:14:53,060 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-03-18 00:14:53,061 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:14:53,062 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 26 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:14:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 00:14:53,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2022-03-18 00:14:53,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:14:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-03-18 00:14:53,074 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2022-03-18 00:14:53,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:14:53,074 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-03-18 00:14:53,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2022-03-18 00:14:53,074 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-03-18 00:14:53,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 00:14:53,075 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:14:53,075 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:14:53,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 00:14:53,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:53,289 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:14:53,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:14:53,290 INFO L85 PathProgramCache]: Analyzing trace with hash -842525419, now seen corresponding path program 7 times [2022-03-18 00:14:53,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:53,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2035591195] [2022-03-18 00:14:53,291 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:14:53,292 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:14:53,292 INFO L85 PathProgramCache]: Analyzing trace with hash -842525419, now seen corresponding path program 8 times [2022-03-18 00:14:53,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:14:53,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109499774] [2022-03-18 00:14:53,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:14:53,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:14:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:53,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:14:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:53,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:14:53,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109499774] [2022-03-18 00:14:53,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109499774] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:14:53,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860657190] [2022-03-18 00:14:53,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:14:53,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:53,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:14:53,364 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:14:53,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 00:14:53,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:14:53,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:14:53,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:14:53,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:14:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 00:14:53,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:14:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 00:14:53,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860657190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:14:53,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:14:53,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-18 00:14:53,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:14:53,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2035591195] [2022-03-18 00:14:53,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2035591195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:53,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:53,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:14:53,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460269099] [2022-03-18 00:14:53,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:14:53,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 00:14:53,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:53,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 00:14:53,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-03-18 00:14:53,609 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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) [2022-03-18 00:14:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:14:53,701 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-03-18 00:14:53,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 00:14:53,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 [2022-03-18 00:14:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:14:53,703 INFO L225 Difference]: With dead ends: 53 [2022-03-18 00:14:53,703 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 00:14:53,703 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-03-18 00:14:53,704 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:14:53,704 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 21 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:14:53,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 00:14:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-03-18 00:14:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:14:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-03-18 00:14:53,710 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2022-03-18 00:14:53,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:14:53,710 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-03-18 00:14:53,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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) [2022-03-18 00:14:53,711 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-03-18 00:14:53,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 00:14:53,711 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:14:53,711 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:14:53,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 00:14:53,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:53,927 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:14:53,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:14:53,927 INFO L85 PathProgramCache]: Analyzing trace with hash 319546039, now seen corresponding path program 9 times [2022-03-18 00:14:53,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:53,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [956262954] [2022-03-18 00:14:53,929 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:14:53,929 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:14:53,930 INFO L85 PathProgramCache]: Analyzing trace with hash 319546039, now seen corresponding path program 10 times [2022-03-18 00:14:53,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:14:53,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219611040] [2022-03-18 00:14:53,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:14:53,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:14:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:53,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:14:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:53,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:14:53,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219611040] [2022-03-18 00:14:53,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219611040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:14:53,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063817009] [2022-03-18 00:14:53,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:14:53,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:53,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:14:54,000 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:14:54,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 00:14:54,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:14:54,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:14:54,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:14:54,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:14:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:54,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:14:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:54,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063817009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:14:54,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:14:54,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-18 00:14:54,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:14:54,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [956262954] [2022-03-18 00:14:54,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [956262954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:54,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:54,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:14:54,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100505093] [2022-03-18 00:14:54,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:14:54,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:14:54,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:54,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:14:54,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:14:54,202 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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) [2022-03-18 00:14:54,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:14:54,312 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-03-18 00:14:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:14:54,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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 [2022-03-18 00:14:54,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:14:54,313 INFO L225 Difference]: With dead ends: 59 [2022-03-18 00:14:54,313 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 00:14:54,314 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-03-18 00:14:54,314 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:14:54,314 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 36 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:14:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 00:14:54,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-03-18 00:14:54,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 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) [2022-03-18 00:14:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-03-18 00:14:54,327 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2022-03-18 00:14:54,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:14:54,329 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-03-18 00:14:54,329 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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) [2022-03-18 00:14:54,329 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-03-18 00:14:54,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 00:14:54,332 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:14:54,332 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:14:54,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 00:14:54,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:54,560 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:14:54,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:14:54,560 INFO L85 PathProgramCache]: Analyzing trace with hash 378720217, now seen corresponding path program 11 times [2022-03-18 00:14:54,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:54,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [586579513] [2022-03-18 00:14:54,562 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:14:54,562 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:14:54,562 INFO L85 PathProgramCache]: Analyzing trace with hash 378720217, now seen corresponding path program 12 times [2022-03-18 00:14:54,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:14:54,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9095975] [2022-03-18 00:14:54,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:14:54,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:14:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:54,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:14:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:54,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:14:54,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9095975] [2022-03-18 00:14:54,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9095975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:14:54,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407586101] [2022-03-18 00:14:54,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:14:54,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:54,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:14:54,645 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:14:54,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 00:14:54,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:14:54,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:14:54,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:14:54,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:14:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 00:14:54,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:14:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 00:14:54,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407586101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:14:54,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:14:54,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-03-18 00:14:54,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:14:54,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [586579513] [2022-03-18 00:14:54,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [586579513] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:54,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:54,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 00:14:54,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779869860] [2022-03-18 00:14:54,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:14:54,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 00:14:54,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:54,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 00:14:54,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-03-18 00:14:54,908 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2022-03-18 00:14:55,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:14:55,066 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-03-18 00:14:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 00:14:55,066 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 [2022-03-18 00:14:55,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:14:55,067 INFO L225 Difference]: With dead ends: 65 [2022-03-18 00:14:55,067 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 00:14:55,067 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2022-03-18 00:14:55,068 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:14:55,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 31 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:14:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 00:14:55,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2022-03-18 00:14:55,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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) [2022-03-18 00:14:55,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-03-18 00:14:55,075 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2022-03-18 00:14:55,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:14:55,075 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-03-18 00:14:55,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2022-03-18 00:14:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-03-18 00:14:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 00:14:55,075 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:14:55,076 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:14:55,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 00:14:55,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:55,276 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:14:55,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:14:55,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1410530427, now seen corresponding path program 13 times [2022-03-18 00:14:55,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:55,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1547782802] [2022-03-18 00:14:55,279 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:14:55,279 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:14:55,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1410530427, now seen corresponding path program 14 times [2022-03-18 00:14:55,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:14:55,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232407392] [2022-03-18 00:14:55,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:14:55,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:14:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:55,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:14:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:55,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:14:55,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232407392] [2022-03-18 00:14:55,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232407392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:14:55,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922063335] [2022-03-18 00:14:55,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:14:55,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:55,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:14:55,359 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:14:55,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 00:14:55,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:14:55,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:14:55,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 00:14:55,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:14:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:55,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:14:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:55,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922063335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:14:55,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:14:55,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-18 00:14:55,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:14:55,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1547782802] [2022-03-18 00:14:55,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1547782802] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:55,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:55,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 00:14:55,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622527788] [2022-03-18 00:14:55,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:14:55,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 00:14:55,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:55,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 00:14:55,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-18 00:14:55,614 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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) [2022-03-18 00:14:55,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:14:55,754 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2022-03-18 00:14:55,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 00:14:55,755 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have 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 [2022-03-18 00:14:55,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:14:55,756 INFO L225 Difference]: With dead ends: 71 [2022-03-18 00:14:55,756 INFO L226 Difference]: Without dead ends: 57 [2022-03-18 00:14:55,756 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-03-18 00:14:55,757 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:14:55,757 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 26 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:14:55,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-18 00:14:55,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2022-03-18 00:14:55,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:14:55,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-03-18 00:14:55,764 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2022-03-18 00:14:55,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:14:55,765 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-03-18 00:14:55,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:14:55,765 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-03-18 00:14:55,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 00:14:55,765 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:14:55,765 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:14:55,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 00:14:55,975 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,SelfDestructingSolverStorable9 [2022-03-18 00:14:55,976 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:14:55,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:14:55,976 INFO L85 PathProgramCache]: Analyzing trace with hash 842696861, now seen corresponding path program 15 times [2022-03-18 00:14:55,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:55,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1676260932] [2022-03-18 00:14:55,978 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:14:55,978 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:14:55,978 INFO L85 PathProgramCache]: Analyzing trace with hash 842696861, now seen corresponding path program 16 times [2022-03-18 00:14:55,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:14:55,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514165615] [2022-03-18 00:14:55,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:14:55,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:14:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:56,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:14:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:56,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:14:56,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514165615] [2022-03-18 00:14:56,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514165615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:14:56,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968387525] [2022-03-18 00:14:56,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:14:56,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:56,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:14:56,089 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:14:56,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 00:14:56,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:14:56,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:14:56,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 00:14:56,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:14:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:56,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:14:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:56,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968387525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:14:56,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:14:56,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-18 00:14:56,358 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:14:56,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1676260932] [2022-03-18 00:14:56,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1676260932] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:56,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:56,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 00:14:56,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026619696] [2022-03-18 00:14:56,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:14:56,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 00:14:56,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:56,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 00:14:56,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-18 00:14:56,360 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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) [2022-03-18 00:14:56,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:14:56,502 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-03-18 00:14:56,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 00:14:56,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 34 [2022-03-18 00:14:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:14:56,503 INFO L225 Difference]: With dead ends: 77 [2022-03-18 00:14:56,503 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 00:14:56,504 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:14:56,504 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 107 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:14:56,505 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 26 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:14:56,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 00:14:56,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 37. [2022-03-18 00:14:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:14:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-03-18 00:14:56,512 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2022-03-18 00:14:56,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:14:56,512 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-03-18 00:14:56,512 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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) [2022-03-18 00:14:56,512 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-03-18 00:14:56,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 00:14:56,513 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:14:56,513 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:14:56,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 00:14:56,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:56,740 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:14:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:14:56,740 INFO L85 PathProgramCache]: Analyzing trace with hash 615486527, now seen corresponding path program 17 times [2022-03-18 00:14:56,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:56,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [191237594] [2022-03-18 00:14:56,742 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:14:56,742 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:14:56,742 INFO L85 PathProgramCache]: Analyzing trace with hash 615486527, now seen corresponding path program 18 times [2022-03-18 00:14:56,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:14:56,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554032609] [2022-03-18 00:14:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:14:56,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:14:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:56,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:14:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:56,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:14:56,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554032609] [2022-03-18 00:14:56,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554032609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:14:56,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781762472] [2022-03-18 00:14:56,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:14:56,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:56,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:14:56,865 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:14:56,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 00:14:56,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:14:56,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:14:56,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:14:56,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:14:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 00:14:57,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:14:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 00:14:57,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781762472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:14:57,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:14:57,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2022-03-18 00:14:57,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:14:57,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [191237594] [2022-03-18 00:14:57,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [191237594] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:57,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:57,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 00:14:57,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109847753] [2022-03-18 00:14:57,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:14:57,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 00:14:57,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:57,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 00:14:57,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2022-03-18 00:14:57,111 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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) [2022-03-18 00:14:57,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:14:57,304 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2022-03-18 00:14:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 00:14:57,305 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 36 [2022-03-18 00:14:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:14:57,305 INFO L225 Difference]: With dead ends: 83 [2022-03-18 00:14:57,306 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 00:14:57,306 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2022-03-18 00:14:57,307 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:14:57,307 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 26 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:14:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 00:14:57,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2022-03-18 00:14:57,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 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) [2022-03-18 00:14:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-03-18 00:14:57,316 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2022-03-18 00:14:57,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:14:57,316 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-03-18 00:14:57,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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) [2022-03-18 00:14:57,316 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-03-18 00:14:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 00:14:57,317 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:14:57,317 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:14:57,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 00:14:57,531 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,SelfDestructingSolverStorable11 [2022-03-18 00:14:57,532 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:14:57,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:14:57,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1309687649, now seen corresponding path program 19 times [2022-03-18 00:14:57,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:57,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [267345087] [2022-03-18 00:14:57,533 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:14:57,534 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:14:57,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1309687649, now seen corresponding path program 20 times [2022-03-18 00:14:57,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:14:57,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003353255] [2022-03-18 00:14:57,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:14:57,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:14:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:57,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:14:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:57,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:14:57,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003353255] [2022-03-18 00:14:57,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003353255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:14:57,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072514958] [2022-03-18 00:14:57,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:14:57,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:57,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:14:57,642 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:14:57,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 00:14:57,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:14:57,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:14:57,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 00:14:57,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:14:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:57,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:14:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:58,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072514958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:14:58,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:14:58,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-18 00:14:58,007 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:14:58,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [267345087] [2022-03-18 00:14:58,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [267345087] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:58,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:58,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 00:14:58,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512492000] [2022-03-18 00:14:58,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:14:58,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 00:14:58,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:58,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 00:14:58,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-18 00:14:58,008 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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) [2022-03-18 00:14:58,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:14:58,207 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2022-03-18 00:14:58,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 00:14:58,207 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 38 [2022-03-18 00:14:58,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:14:58,208 INFO L225 Difference]: With dead ends: 89 [2022-03-18 00:14:58,208 INFO L226 Difference]: Without dead ends: 75 [2022-03-18 00:14:58,209 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 00:14:58,209 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 128 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:14:58,209 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 26 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:14:58,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-18 00:14:58,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 41. [2022-03-18 00:14:58,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:14:58,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-03-18 00:14:58,217 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2022-03-18 00:14:58,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:14:58,218 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-03-18 00:14:58,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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) [2022-03-18 00:14:58,218 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-03-18 00:14:58,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 00:14:58,218 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:14:58,219 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:14:58,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 00:14:58,437 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,SelfDestructingSolverStorable12 [2022-03-18 00:14:58,437 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:14:58,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:14:58,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1577932285, now seen corresponding path program 21 times [2022-03-18 00:14:58,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:58,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1902885723] [2022-03-18 00:14:58,439 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:14:58,439 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:14:58,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1577932285, now seen corresponding path program 22 times [2022-03-18 00:14:58,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:14:58,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648819616] [2022-03-18 00:14:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:14:58,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:14:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:58,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:14:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:58,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:14:58,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648819616] [2022-03-18 00:14:58,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648819616] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:14:58,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093307646] [2022-03-18 00:14:58,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:14:58,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:58,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:14:58,565 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:14:58,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 00:14:58,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:14:58,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:14:58,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 00:14:58,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:14:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:58,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:14:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:58,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093307646] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:14:58,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:14:58,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-18 00:14:58,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:14:58,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1902885723] [2022-03-18 00:14:58,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1902885723] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:58,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:58,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 00:14:58,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706232048] [2022-03-18 00:14:58,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:14:58,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 00:14:58,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:58,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 00:14:58,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-18 00:14:58,969 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2022-03-18 00:14:59,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:14:59,206 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2022-03-18 00:14:59,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 00:14:59,206 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 40 [2022-03-18 00:14:59,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:14:59,207 INFO L225 Difference]: With dead ends: 95 [2022-03-18 00:14:59,207 INFO L226 Difference]: Without dead ends: 81 [2022-03-18 00:14:59,208 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 00:14:59,209 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 129 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:14:59,209 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 41 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:14:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-18 00:14:59,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2022-03-18 00:14:59,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:14:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-03-18 00:14:59,217 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2022-03-18 00:14:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:14:59,218 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-03-18 00:14:59,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2022-03-18 00:14:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-03-18 00:14:59,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 00:14:59,218 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:14:59,218 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:14:59,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 00:14:59,431 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,SelfDestructingSolverStorable13 [2022-03-18 00:14:59,432 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:14:59,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:14:59,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2031815643, now seen corresponding path program 23 times [2022-03-18 00:14:59,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:59,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1392906133] [2022-03-18 00:14:59,434 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:14:59,434 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:14:59,434 INFO L85 PathProgramCache]: Analyzing trace with hash -2031815643, now seen corresponding path program 24 times [2022-03-18 00:14:59,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:14:59,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27350192] [2022-03-18 00:14:59,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:14:59,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:14:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:59,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:14:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:14:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:14:59,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:14:59,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27350192] [2022-03-18 00:14:59,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27350192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:14:59,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880752089] [2022-03-18 00:14:59,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:14:59,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:14:59,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:14:59,554 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:14:59,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 00:14:59,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:14:59,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:14:59,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:14:59,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:14:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-18 00:14:59,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:14:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-18 00:14:59,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880752089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:14:59,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:14:59,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 21 [2022-03-18 00:14:59,827 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:14:59,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1392906133] [2022-03-18 00:14:59,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1392906133] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:14:59,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:14:59,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 00:14:59,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555743356] [2022-03-18 00:14:59,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:14:59,828 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 00:14:59,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:14:59,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 00:14:59,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2022-03-18 00:14:59,829 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 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) [2022-03-18 00:15:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:00,074 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2022-03-18 00:15:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 00:15:00,074 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 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 42 [2022-03-18 00:15:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:00,075 INFO L225 Difference]: With dead ends: 101 [2022-03-18 00:15:00,075 INFO L226 Difference]: Without dead ends: 87 [2022-03-18 00:15:00,076 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=680, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 00:15:00,076 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 145 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:00,076 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 31 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-18 00:15:00,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 45. [2022-03-18 00:15:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:00,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-03-18 00:15:00,085 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2022-03-18 00:15:00,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:00,086 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-03-18 00:15:00,086 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 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) [2022-03-18 00:15:00,086 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-03-18 00:15:00,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 00:15:00,086 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:00,086 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:00,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:00,307 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,SelfDestructingSolverStorable14 [2022-03-18 00:15:00,308 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:00,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:00,308 INFO L85 PathProgramCache]: Analyzing trace with hash -127058489, now seen corresponding path program 25 times [2022-03-18 00:15:00,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:00,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1002165415] [2022-03-18 00:15:00,309 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:00,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:00,310 INFO L85 PathProgramCache]: Analyzing trace with hash -127058489, now seen corresponding path program 26 times [2022-03-18 00:15:00,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:00,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223251926] [2022-03-18 00:15:00,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:00,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:00,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:00,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:00,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223251926] [2022-03-18 00:15:00,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223251926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:00,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24747256] [2022-03-18 00:15:00,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:15:00,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:00,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:00,459 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:00,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 00:15:00,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:15:00,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:00,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 00:15:00,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:00,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:00,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24747256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:00,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:00,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-03-18 00:15:00,917 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:00,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1002165415] [2022-03-18 00:15:00,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1002165415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:00,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:00,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 00:15:00,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750795849] [2022-03-18 00:15:00,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:00,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 00:15:00,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:00,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 00:15:00,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-03-18 00:15:00,919 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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) [2022-03-18 00:15:01,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:01,209 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2022-03-18 00:15:01,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 00:15:01,209 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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 44 [2022-03-18 00:15:01,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:01,210 INFO L225 Difference]: With dead ends: 107 [2022-03-18 00:15:01,210 INFO L226 Difference]: Without dead ends: 93 [2022-03-18 00:15:01,211 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 00:15:01,212 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 156 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:01,212 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 31 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-18 00:15:01,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 47. [2022-03-18 00:15:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 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) [2022-03-18 00:15:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-03-18 00:15:01,221 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2022-03-18 00:15:01,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:01,221 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-03-18 00:15:01,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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) [2022-03-18 00:15:01,222 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-03-18 00:15:01,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 00:15:01,222 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:01,222 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:01,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:01,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:01,439 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:01,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:01,439 INFO L85 PathProgramCache]: Analyzing trace with hash 688498409, now seen corresponding path program 27 times [2022-03-18 00:15:01,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:01,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1605150208] [2022-03-18 00:15:01,441 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:01,441 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:01,441 INFO L85 PathProgramCache]: Analyzing trace with hash 688498409, now seen corresponding path program 28 times [2022-03-18 00:15:01,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:01,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681934338] [2022-03-18 00:15:01,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:01,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:01,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:01,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:01,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681934338] [2022-03-18 00:15:01,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681934338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:01,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069739681] [2022-03-18 00:15:01,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:15:01,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:01,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:01,584 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) [2022-03-18 00:15:01,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 00:15:01,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:15:01,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:01,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 00:15:01,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:01,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:02,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069739681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:02,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:02,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-18 00:15:02,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:02,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1605150208] [2022-03-18 00:15:02,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1605150208] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:02,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:02,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 00:15:02,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978918021] [2022-03-18 00:15:02,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:02,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 00:15:02,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:02,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 00:15:02,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:15:02,041 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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) [2022-03-18 00:15:02,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:02,304 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2022-03-18 00:15:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 00:15:02,305 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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 46 [2022-03-18 00:15:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:02,305 INFO L225 Difference]: With dead ends: 113 [2022-03-18 00:15:02,305 INFO L226 Difference]: Without dead ends: 99 [2022-03-18 00:15:02,306 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 00:15:02,307 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 183 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:02,307 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 36 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:02,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-18 00:15:02,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 49. [2022-03-18 00:15:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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) [2022-03-18 00:15:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-03-18 00:15:02,315 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2022-03-18 00:15:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:02,315 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-03-18 00:15:02,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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) [2022-03-18 00:15:02,316 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-03-18 00:15:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-18 00:15:02,316 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:02,316 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:02,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-18 00:15:02,516 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,SelfDestructingSolverStorable16 [2022-03-18 00:15:02,517 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:02,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1540337781, now seen corresponding path program 29 times [2022-03-18 00:15:02,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:02,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [251577213] [2022-03-18 00:15:02,519 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:02,519 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:02,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1540337781, now seen corresponding path program 30 times [2022-03-18 00:15:02,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:02,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557735850] [2022-03-18 00:15:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:02,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:02,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:02,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:02,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557735850] [2022-03-18 00:15:02,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557735850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:02,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952666890] [2022-03-18 00:15:02,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:15:02,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:02,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:02,679 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:02,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 00:15:02,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:15:02,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:02,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:15:02,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-18 00:15:02,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-18 00:15:02,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952666890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:02,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:02,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 7] total 24 [2022-03-18 00:15:02,946 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:02,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [251577213] [2022-03-18 00:15:02,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [251577213] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:02,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:02,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 00:15:02,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500261444] [2022-03-18 00:15:02,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:02,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 00:15:02,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:02,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 00:15:02,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2022-03-18 00:15:02,948 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2022-03-18 00:15:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:03,297 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2022-03-18 00:15:03,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 00:15:03,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 48 [2022-03-18 00:15:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:03,299 INFO L225 Difference]: With dead ends: 119 [2022-03-18 00:15:03,299 INFO L226 Difference]: Without dead ends: 105 [2022-03-18 00:15:03,300 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=532, Invalid=950, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 00:15:03,300 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 202 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:03,301 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 26 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:03,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-18 00:15:03,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 51. [2022-03-18 00:15:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:03,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-03-18 00:15:03,313 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2022-03-18 00:15:03,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:03,313 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-03-18 00:15:03,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2022-03-18 00:15:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-03-18 00:15:03,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 00:15:03,314 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:03,314 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:03,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:03,517 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 00:15:03,518 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:03,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:03,518 INFO L85 PathProgramCache]: Analyzing trace with hash -263235667, now seen corresponding path program 31 times [2022-03-18 00:15:03,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:03,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [462443570] [2022-03-18 00:15:03,519 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:03,519 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:03,519 INFO L85 PathProgramCache]: Analyzing trace with hash -263235667, now seen corresponding path program 32 times [2022-03-18 00:15:03,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:03,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709190054] [2022-03-18 00:15:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:03,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:03,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:03,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:03,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709190054] [2022-03-18 00:15:03,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709190054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:03,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955207504] [2022-03-18 00:15:03,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:15:03,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:03,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:03,683 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:03,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 00:15:03,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:15:03,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:03,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 00:15:03,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:03,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:04,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955207504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:04,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:04,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-18 00:15:04,232 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:04,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [462443570] [2022-03-18 00:15:04,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [462443570] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:04,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:04,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 00:15:04,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787052283] [2022-03-18 00:15:04,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:04,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 00:15:04,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:04,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 00:15:04,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 00:15:04,234 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2022-03-18 00:15:04,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:04,642 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2022-03-18 00:15:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 00:15:04,642 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 50 [2022-03-18 00:15:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:04,643 INFO L225 Difference]: With dead ends: 125 [2022-03-18 00:15:04,643 INFO L226 Difference]: Without dead ends: 111 [2022-03-18 00:15:04,644 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 00:15:04,645 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 167 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:04,645 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 56 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:04,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-18 00:15:04,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 53. [2022-03-18 00:15:04,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:04,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-03-18 00:15:04,656 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2022-03-18 00:15:04,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:04,656 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-03-18 00:15:04,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2022-03-18 00:15:04,656 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-03-18 00:15:04,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 00:15:04,657 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:04,657 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:04,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:04,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:04,884 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:04,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:04,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1328750769, now seen corresponding path program 33 times [2022-03-18 00:15:04,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:04,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [429242879] [2022-03-18 00:15:04,885 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:04,885 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:04,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1328750769, now seen corresponding path program 34 times [2022-03-18 00:15:04,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:04,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593487724] [2022-03-18 00:15:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:04,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:05,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:05,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:05,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593487724] [2022-03-18 00:15:05,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593487724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:05,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460517698] [2022-03-18 00:15:05,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:15:05,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:05,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:05,080 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:05,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 00:15:05,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:15:05,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:05,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 00:15:05,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:05,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:05,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460517698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:05,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:05,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-18 00:15:05,657 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:05,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [429242879] [2022-03-18 00:15:05,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [429242879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:05,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:05,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 00:15:05,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856580050] [2022-03-18 00:15:05,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:05,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 00:15:05,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:05,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 00:15:05,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 00:15:05,659 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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) [2022-03-18 00:15:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:06,062 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2022-03-18 00:15:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 00:15:06,062 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 52 [2022-03-18 00:15:06,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:06,063 INFO L225 Difference]: With dead ends: 131 [2022-03-18 00:15:06,063 INFO L226 Difference]: Without dead ends: 117 [2022-03-18 00:15:06,065 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 00:15:06,065 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 203 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:06,065 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 36 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:06,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-18 00:15:06,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 55. [2022-03-18 00:15:06,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-03-18 00:15:06,103 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2022-03-18 00:15:06,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:06,103 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-03-18 00:15:06,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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) [2022-03-18 00:15:06,103 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-03-18 00:15:06,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 00:15:06,103 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:06,104 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:06,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:06,304 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:06,304 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:06,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:06,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1208419953, now seen corresponding path program 35 times [2022-03-18 00:15:06,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:06,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [975669651] [2022-03-18 00:15:06,306 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:06,306 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:06,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1208419953, now seen corresponding path program 36 times [2022-03-18 00:15:06,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:06,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086651008] [2022-03-18 00:15:06,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:06,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:06,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:06,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:06,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086651008] [2022-03-18 00:15:06,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086651008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:06,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19126686] [2022-03-18 00:15:06,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:15:06,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:06,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:06,511 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:06,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 00:15:06,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:15:06,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:06,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:15:06,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-18 00:15:06,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-18 00:15:06,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19126686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:06,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:06,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 7] total 27 [2022-03-18 00:15:06,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:06,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [975669651] [2022-03-18 00:15:06,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [975669651] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:06,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:06,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 00:15:06,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481979966] [2022-03-18 00:15:06,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:06,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 00:15:06,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:06,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 00:15:06,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2022-03-18 00:15:06,807 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2022-03-18 00:15:07,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:07,235 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2022-03-18 00:15:07,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 00:15:07,236 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 54 [2022-03-18 00:15:07,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:07,236 INFO L225 Difference]: With dead ends: 137 [2022-03-18 00:15:07,236 INFO L226 Difference]: Without dead ends: 123 [2022-03-18 00:15:07,237 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=715, Invalid=1265, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 00:15:07,238 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 204 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:07,238 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 46 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:07,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-18 00:15:07,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 57. [2022-03-18 00:15:07,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 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) [2022-03-18 00:15:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-03-18 00:15:07,249 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2022-03-18 00:15:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:07,249 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-03-18 00:15:07,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2022-03-18 00:15:07,249 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-03-18 00:15:07,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 00:15:07,249 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:07,249 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:07,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:07,450 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:07,450 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:07,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:07,451 INFO L85 PathProgramCache]: Analyzing trace with hash -111940333, now seen corresponding path program 37 times [2022-03-18 00:15:07,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:07,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1151042236] [2022-03-18 00:15:07,452 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:07,452 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:07,452 INFO L85 PathProgramCache]: Analyzing trace with hash -111940333, now seen corresponding path program 38 times [2022-03-18 00:15:07,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:07,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044946786] [2022-03-18 00:15:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:07,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:07,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:07,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:07,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044946786] [2022-03-18 00:15:07,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044946786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:07,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144533719] [2022-03-18 00:15:07,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:15:07,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:07,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:07,691 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:07,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 00:15:07,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:15:07,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:07,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 00:15:07,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:07,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:08,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144533719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:08,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:08,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-18 00:15:08,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1151042236] [2022-03-18 00:15:08,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1151042236] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:08,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:08,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 00:15:08,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663158881] [2022-03-18 00:15:08,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:08,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 00:15:08,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:08,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 00:15:08,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 00:15:08,362 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2022-03-18 00:15:08,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:08,778 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2022-03-18 00:15:08,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 00:15:08,780 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 56 [2022-03-18 00:15:08,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:08,781 INFO L225 Difference]: With dead ends: 143 [2022-03-18 00:15:08,781 INFO L226 Difference]: Without dead ends: 129 [2022-03-18 00:15:08,781 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-03-18 00:15:08,782 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 254 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:08,782 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 31 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:08,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-18 00:15:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 59. [2022-03-18 00:15:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-03-18 00:15:08,794 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2022-03-18 00:15:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:08,794 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-03-18 00:15:08,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2022-03-18 00:15:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-03-18 00:15:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 00:15:08,795 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:08,795 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:08,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:09,009 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,SelfDestructingSolverStorable21 [2022-03-18 00:15:09,009 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:09,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1962822859, now seen corresponding path program 39 times [2022-03-18 00:15:09,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:09,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [436681114] [2022-03-18 00:15:09,011 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:09,011 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:09,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1962822859, now seen corresponding path program 40 times [2022-03-18 00:15:09,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:09,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640449892] [2022-03-18 00:15:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:09,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:09,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:09,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:09,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640449892] [2022-03-18 00:15:09,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640449892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:09,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450754501] [2022-03-18 00:15:09,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:15:09,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:09,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:09,231 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:09,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 00:15:09,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:15:09,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:09,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 00:15:09,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:09,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:09,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450754501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:09,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:09,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-18 00:15:09,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:09,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [436681114] [2022-03-18 00:15:09,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [436681114] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:09,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:09,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 00:15:09,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933485149] [2022-03-18 00:15:09,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:09,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 00:15:09,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:09,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 00:15:09,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 00:15:09,912 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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) [2022-03-18 00:15:10,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:10,390 INFO L93 Difference]: Finished difference Result 149 states and 169 transitions. [2022-03-18 00:15:10,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 00:15:10,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 58 [2022-03-18 00:15:10,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:10,391 INFO L225 Difference]: With dead ends: 149 [2022-03-18 00:15:10,391 INFO L226 Difference]: Without dead ends: 135 [2022-03-18 00:15:10,392 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 00:15:10,392 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 290 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:10,392 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 36 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:10,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-18 00:15:10,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 61. [2022-03-18 00:15:10,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:10,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-03-18 00:15:10,403 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2022-03-18 00:15:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:10,403 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-03-18 00:15:10,404 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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) [2022-03-18 00:15:10,404 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-03-18 00:15:10,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 00:15:10,404 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:10,404 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:10,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-18 00:15:10,604 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,SelfDestructingSolverStorable22 [2022-03-18 00:15:10,605 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:10,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1750497495, now seen corresponding path program 41 times [2022-03-18 00:15:10,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:10,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2030957159] [2022-03-18 00:15:10,606 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:10,606 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:10,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1750497495, now seen corresponding path program 42 times [2022-03-18 00:15:10,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:10,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400188052] [2022-03-18 00:15:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:10,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:10,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:10,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:10,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400188052] [2022-03-18 00:15:10,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400188052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:10,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224562881] [2022-03-18 00:15:10,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:15:10,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:10,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:10,848 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:10,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 00:15:10,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:15:10,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:10,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:15:10,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:11,027 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-18 00:15:11,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:11,151 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-18 00:15:11,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224562881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:11,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:11,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 30 [2022-03-18 00:15:11,152 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:11,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2030957159] [2022-03-18 00:15:11,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2030957159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:11,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:11,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 00:15:11,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957402858] [2022-03-18 00:15:11,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:11,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 00:15:11,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:11,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 00:15:11,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2022-03-18 00:15:11,153 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2022-03-18 00:15:11,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:11,660 INFO L93 Difference]: Finished difference Result 155 states and 176 transitions. [2022-03-18 00:15:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 00:15:11,661 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 60 [2022-03-18 00:15:11,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:11,662 INFO L225 Difference]: With dead ends: 155 [2022-03-18 00:15:11,662 INFO L226 Difference]: Without dead ends: 141 [2022-03-18 00:15:11,662 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=925, Invalid=1625, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 00:15:11,663 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 270 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:11,663 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 26 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:11,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-18 00:15:11,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 63. [2022-03-18 00:15:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 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) [2022-03-18 00:15:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-03-18 00:15:11,676 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2022-03-18 00:15:11,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:11,676 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-03-18 00:15:11,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2022-03-18 00:15:11,676 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-03-18 00:15:11,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-18 00:15:11,677 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:11,677 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:11,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:11,890 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:11,890 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:11,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:11,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1133534713, now seen corresponding path program 43 times [2022-03-18 00:15:11,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:11,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1709815671] [2022-03-18 00:15:11,892 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:11,892 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1133534713, now seen corresponding path program 44 times [2022-03-18 00:15:11,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:11,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505762262] [2022-03-18 00:15:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:11,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:12,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:12,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:12,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505762262] [2022-03-18 00:15:12,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505762262] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:12,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519265483] [2022-03-18 00:15:12,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:15:12,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:12,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:12,164 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:12,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 00:15:12,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:15:12,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:12,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 00:15:12,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:12,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:12,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519265483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:12,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:12,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-03-18 00:15:12,946 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:12,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1709815671] [2022-03-18 00:15:12,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1709815671] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:12,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:12,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 00:15:12,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489572747] [2022-03-18 00:15:12,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:12,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 00:15:12,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:12,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 00:15:12,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 00:15:12,948 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2022-03-18 00:15:13,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:13,520 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2022-03-18 00:15:13,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 00:15:13,520 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 62 [2022-03-18 00:15:13,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:13,521 INFO L225 Difference]: With dead ends: 161 [2022-03-18 00:15:13,521 INFO L226 Difference]: Without dead ends: 147 [2022-03-18 00:15:13,523 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 00:15:13,523 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 268 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:13,524 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 41 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-18 00:15:13,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 65. [2022-03-18 00:15:13,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:13,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-03-18 00:15:13,541 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2022-03-18 00:15:13,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:13,541 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-03-18 00:15:13,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2022-03-18 00:15:13,542 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-03-18 00:15:13,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 00:15:13,542 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:13,542 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:13,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-18 00:15:13,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:13,751 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:13,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:13,752 INFO L85 PathProgramCache]: Analyzing trace with hash 937788059, now seen corresponding path program 45 times [2022-03-18 00:15:13,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:13,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2042343496] [2022-03-18 00:15:13,753 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:13,753 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:13,753 INFO L85 PathProgramCache]: Analyzing trace with hash 937788059, now seen corresponding path program 46 times [2022-03-18 00:15:13,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:13,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056531517] [2022-03-18 00:15:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:13,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:14,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:14,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:14,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056531517] [2022-03-18 00:15:14,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056531517] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:14,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903963816] [2022-03-18 00:15:14,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:15:14,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:14,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:14,071 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:14,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 00:15:14,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:15:14,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:14,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 00:15:14,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:14,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:14,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903963816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:14,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:14,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-18 00:15:14,957 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:14,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2042343496] [2022-03-18 00:15:14,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2042343496] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:14,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:14,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-18 00:15:14,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987660792] [2022-03-18 00:15:14,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:14,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 00:15:14,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:14,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 00:15:14,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 00:15:14,959 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2022-03-18 00:15:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:15,630 INFO L93 Difference]: Finished difference Result 167 states and 190 transitions. [2022-03-18 00:15:15,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 00:15:15,630 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 64 [2022-03-18 00:15:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:15,632 INFO L225 Difference]: With dead ends: 167 [2022-03-18 00:15:15,632 INFO L226 Difference]: Without dead ends: 153 [2022-03-18 00:15:15,633 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 00:15:15,634 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 330 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:15,635 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 36 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:15,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-18 00:15:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 67. [2022-03-18 00:15:15,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-03-18 00:15:15,655 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2022-03-18 00:15:15,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:15,655 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-03-18 00:15:15,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2022-03-18 00:15:15,656 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-03-18 00:15:15,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 00:15:15,656 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:15,656 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:15,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:15,871 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,SelfDestructingSolverStorable25 [2022-03-18 00:15:15,871 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:15,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:15,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1803814589, now seen corresponding path program 47 times [2022-03-18 00:15:15,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:15,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1246753353] [2022-03-18 00:15:15,873 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:15,873 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:15,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1803814589, now seen corresponding path program 48 times [2022-03-18 00:15:15,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:15,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327008521] [2022-03-18 00:15:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:15,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:16,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:16,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:16,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327008521] [2022-03-18 00:15:16,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327008521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:16,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291321332] [2022-03-18 00:15:16,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:15:16,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:16,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:16,196 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:16,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 00:15:16,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:15:16,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:16,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:15:16,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-03-18 00:15:16,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-03-18 00:15:16,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291321332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:16,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:16,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7, 7] total 33 [2022-03-18 00:15:16,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:16,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1246753353] [2022-03-18 00:15:16,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1246753353] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:16,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:16,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-18 00:15:16,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727209575] [2022-03-18 00:15:16,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:16,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 00:15:16,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:16,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 00:15:16,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 00:15:16,640 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 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) [2022-03-18 00:15:17,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:17,363 INFO L93 Difference]: Finished difference Result 173 states and 197 transitions. [2022-03-18 00:15:17,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 00:15:17,364 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 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 66 [2022-03-18 00:15:17,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:17,365 INFO L225 Difference]: With dead ends: 173 [2022-03-18 00:15:17,365 INFO L226 Difference]: Without dead ends: 159 [2022-03-18 00:15:17,366 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1162, Invalid=2030, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 00:15:17,366 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 287 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:17,366 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 51 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:17,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-18 00:15:17,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 69. [2022-03-18 00:15:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-03-18 00:15:17,381 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2022-03-18 00:15:17,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:17,381 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-03-18 00:15:17,381 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 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) [2022-03-18 00:15:17,381 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-03-18 00:15:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 00:15:17,381 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:17,381 INFO L500 BasicCegarLoop]: trace histogram [24, 24, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:17,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-18 00:15:17,582 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,SelfDestructingSolverStorable26 [2022-03-18 00:15:17,582 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:17,582 INFO L85 PathProgramCache]: Analyzing trace with hash 831654495, now seen corresponding path program 49 times [2022-03-18 00:15:17,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:17,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [972177308] [2022-03-18 00:15:17,584 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:17,584 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:17,584 INFO L85 PathProgramCache]: Analyzing trace with hash 831654495, now seen corresponding path program 50 times [2022-03-18 00:15:17,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:17,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344539392] [2022-03-18 00:15:17,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:17,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:17,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:17,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:17,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344539392] [2022-03-18 00:15:17,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344539392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:17,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594771000] [2022-03-18 00:15:17,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:15:17,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:17,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:17,922 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:17,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 00:15:18,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:15:18,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:18,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 00:15:18,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:18,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:18,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594771000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:18,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:18,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-03-18 00:15:18,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:18,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [972177308] [2022-03-18 00:15:18,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [972177308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:18,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:18,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-18 00:15:18,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999276543] [2022-03-18 00:15:18,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:18,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 00:15:18,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:18,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 00:15:18,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:15:18,933 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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) [2022-03-18 00:15:19,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:19,603 INFO L93 Difference]: Finished difference Result 179 states and 204 transitions. [2022-03-18 00:15:19,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 00:15:19,603 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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 68 [2022-03-18 00:15:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:19,604 INFO L225 Difference]: With dead ends: 179 [2022-03-18 00:15:19,604 INFO L226 Difference]: Without dead ends: 165 [2022-03-18 00:15:19,605 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 00:15:19,605 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 323 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:19,605 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 41 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-18 00:15:19,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 71. [2022-03-18 00:15:19,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 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) [2022-03-18 00:15:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-03-18 00:15:19,622 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2022-03-18 00:15:19,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:19,622 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-03-18 00:15:19,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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) [2022-03-18 00:15:19,622 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-03-18 00:15:19,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-18 00:15:19,623 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:19,623 INFO L500 BasicCegarLoop]: trace histogram [25, 25, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:19,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:19,837 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,SelfDestructingSolverStorable27 [2022-03-18 00:15:19,838 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:19,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1406292607, now seen corresponding path program 51 times [2022-03-18 00:15:19,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:19,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1215630033] [2022-03-18 00:15:19,839 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:19,839 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:19,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1406292607, now seen corresponding path program 52 times [2022-03-18 00:15:19,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:19,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685313731] [2022-03-18 00:15:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:19,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:20,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:20,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:20,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685313731] [2022-03-18 00:15:20,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685313731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:20,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483419204] [2022-03-18 00:15:20,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:15:20,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:20,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:20,192 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:20,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 00:15:20,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:15:20,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:20,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 00:15:20,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:20,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:21,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483419204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:21,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:21,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-18 00:15:21,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:21,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1215630033] [2022-03-18 00:15:21,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1215630033] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:21,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:21,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-18 00:15:21,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219403722] [2022-03-18 00:15:21,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:21,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 00:15:21,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:21,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 00:15:21,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 00:15:21,320 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 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) [2022-03-18 00:15:22,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:22,065 INFO L93 Difference]: Finished difference Result 185 states and 211 transitions. [2022-03-18 00:15:22,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 00:15:22,065 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 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 70 [2022-03-18 00:15:22,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:22,066 INFO L225 Difference]: With dead ends: 185 [2022-03-18 00:15:22,066 INFO L226 Difference]: Without dead ends: 171 [2022-03-18 00:15:22,066 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 00:15:22,067 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 327 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:22,067 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 41 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:22,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-18 00:15:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 73. [2022-03-18 00:15:22,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 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) [2022-03-18 00:15:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-03-18 00:15:22,085 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2022-03-18 00:15:22,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:22,085 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-03-18 00:15:22,086 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 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) [2022-03-18 00:15:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-03-18 00:15:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-18 00:15:22,086 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:22,086 INFO L500 BasicCegarLoop]: trace histogram [26, 26, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:22,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:22,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-18 00:15:22,291 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:22,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:22,292 INFO L85 PathProgramCache]: Analyzing trace with hash -294842333, now seen corresponding path program 53 times [2022-03-18 00:15:22,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:22,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2022684360] [2022-03-18 00:15:22,293 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:22,293 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:22,293 INFO L85 PathProgramCache]: Analyzing trace with hash -294842333, now seen corresponding path program 54 times [2022-03-18 00:15:22,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:22,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476059698] [2022-03-18 00:15:22,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:22,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:22,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:22,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:22,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476059698] [2022-03-18 00:15:22,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476059698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:22,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20303299] [2022-03-18 00:15:22,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:15:22,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:22,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:22,636 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:22,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 00:15:22,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:15:22,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:22,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:15:22,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-03-18 00:15:22,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-03-18 00:15:23,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20303299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:23,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:23,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 7, 7] total 36 [2022-03-18 00:15:23,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:23,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2022684360] [2022-03-18 00:15:23,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2022684360] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:23,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:23,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-18 00:15:23,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424666623] [2022-03-18 00:15:23,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:23,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 00:15:23,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:23,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 00:15:23,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 00:15:23,010 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:23,925 INFO L93 Difference]: Finished difference Result 191 states and 218 transitions. [2022-03-18 00:15:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 00:15:23,925 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-03-18 00:15:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:23,926 INFO L225 Difference]: With dead ends: 191 [2022-03-18 00:15:23,926 INFO L226 Difference]: Without dead ends: 177 [2022-03-18 00:15:23,927 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1426, Invalid=2480, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 00:15:23,927 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 407 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:23,928 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 21 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:23,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-18 00:15:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 75. [2022-03-18 00:15:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-03-18 00:15:23,948 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2022-03-18 00:15:23,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:23,948 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-03-18 00:15:23,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-03-18 00:15:23,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-18 00:15:23,949 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:23,949 INFO L500 BasicCegarLoop]: trace histogram [27, 27, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:23,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-18 00:15:24,149 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:24,149 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:24,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:24,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1637985723, now seen corresponding path program 55 times [2022-03-18 00:15:24,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:24,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1848477119] [2022-03-18 00:15:24,151 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:24,151 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:24,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1637985723, now seen corresponding path program 56 times [2022-03-18 00:15:24,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:24,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318966205] [2022-03-18 00:15:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:24,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:24,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:24,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:24,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318966205] [2022-03-18 00:15:24,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318966205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:24,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926360850] [2022-03-18 00:15:24,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:15:24,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:24,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:24,523 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:24,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 00:15:24,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:15:24,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:24,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 00:15:24,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:24,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:25,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926360850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:25,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:25,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-03-18 00:15:25,652 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:25,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1848477119] [2022-03-18 00:15:25,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1848477119] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:25,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:25,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-18 00:15:25,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884487465] [2022-03-18 00:15:25,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:25,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 00:15:25,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:25,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 00:15:25,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 00:15:25,653 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:26,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:26,598 INFO L93 Difference]: Finished difference Result 197 states and 225 transitions. [2022-03-18 00:15:26,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 00:15:26,598 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-03-18 00:15:26,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:26,599 INFO L225 Difference]: With dead ends: 197 [2022-03-18 00:15:26,600 INFO L226 Difference]: Without dead ends: 183 [2022-03-18 00:15:26,600 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 00:15:26,601 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 343 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:26,601 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 46 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-18 00:15:26,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 77. [2022-03-18 00:15:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-03-18 00:15:26,625 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2022-03-18 00:15:26,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:26,625 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-03-18 00:15:26,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:26,625 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-03-18 00:15:26,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-18 00:15:26,626 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:26,626 INFO L500 BasicCegarLoop]: trace histogram [28, 28, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:26,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:26,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:26,849 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:26,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:26,849 INFO L85 PathProgramCache]: Analyzing trace with hash 386372583, now seen corresponding path program 57 times [2022-03-18 00:15:26,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:26,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [439699804] [2022-03-18 00:15:26,851 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:26,851 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:26,851 INFO L85 PathProgramCache]: Analyzing trace with hash 386372583, now seen corresponding path program 58 times [2022-03-18 00:15:26,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:26,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372833524] [2022-03-18 00:15:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:26,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:27,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:27,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:27,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372833524] [2022-03-18 00:15:27,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372833524] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:27,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378725878] [2022-03-18 00:15:27,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:15:27,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:27,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:27,271 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:27,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 00:15:27,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:15:27,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:27,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 00:15:27,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:27,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:28,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378725878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:28,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:28,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-03-18 00:15:28,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:28,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [439699804] [2022-03-18 00:15:28,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [439699804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:28,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:28,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-18 00:15:28,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112810378] [2022-03-18 00:15:28,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:28,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 00:15:28,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:28,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 00:15:28,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 00:15:28,446 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:29,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:29,336 INFO L93 Difference]: Finished difference Result 203 states and 232 transitions. [2022-03-18 00:15:29,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 00:15:29,337 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-03-18 00:15:29,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:29,338 INFO L225 Difference]: With dead ends: 203 [2022-03-18 00:15:29,338 INFO L226 Difference]: Without dead ends: 189 [2022-03-18 00:15:29,338 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-03-18 00:15:29,339 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 361 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:29,339 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 51 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:29,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-18 00:15:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 79. [2022-03-18 00:15:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-03-18 00:15:29,368 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2022-03-18 00:15:29,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:29,368 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-03-18 00:15:29,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:29,369 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-03-18 00:15:29,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-18 00:15:29,369 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:29,369 INFO L500 BasicCegarLoop]: trace histogram [29, 29, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:29,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-18 00:15:29,578 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,SelfDestructingSolverStorable31 [2022-03-18 00:15:29,578 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:29,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:29,578 INFO L85 PathProgramCache]: Analyzing trace with hash 174519561, now seen corresponding path program 59 times [2022-03-18 00:15:29,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:29,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1047929828] [2022-03-18 00:15:29,580 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:29,580 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:29,580 INFO L85 PathProgramCache]: Analyzing trace with hash 174519561, now seen corresponding path program 60 times [2022-03-18 00:15:29,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:29,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662831367] [2022-03-18 00:15:29,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:29,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:29,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:29,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:29,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662831367] [2022-03-18 00:15:29,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662831367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:29,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970122851] [2022-03-18 00:15:29,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:15:29,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:29,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:29,968 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:29,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 00:15:30,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:15:30,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:30,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:15:30,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 00:15:30,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 00:15:30,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970122851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:30,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:30,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 39 [2022-03-18 00:15:30,397 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:30,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1047929828] [2022-03-18 00:15:30,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1047929828] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:30,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:30,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-18 00:15:30,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516844667] [2022-03-18 00:15:30,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:30,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 00:15:30,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:30,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 00:15:30,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 00:15:30,399 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:31,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:31,421 INFO L93 Difference]: Finished difference Result 209 states and 239 transitions. [2022-03-18 00:15:31,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 00:15:31,422 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-03-18 00:15:31,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:31,422 INFO L225 Difference]: With dead ends: 209 [2022-03-18 00:15:31,422 INFO L226 Difference]: Without dead ends: 195 [2022-03-18 00:15:31,423 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1717, Invalid=2975, Unknown=0, NotChecked=0, Total=4692 [2022-03-18 00:15:31,423 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 428 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:31,424 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 36 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:31,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-18 00:15:31,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 81. [2022-03-18 00:15:31,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 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) [2022-03-18 00:15:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-03-18 00:15:31,448 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2022-03-18 00:15:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:31,448 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-03-18 00:15:31,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-03-18 00:15:31,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-18 00:15:31,449 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:31,449 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:31,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-18 00:15:31,649 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:31,649 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:31,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:31,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1552771669, now seen corresponding path program 61 times [2022-03-18 00:15:31,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:31,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2106897197] [2022-03-18 00:15:31,651 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:31,651 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:31,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1552771669, now seen corresponding path program 62 times [2022-03-18 00:15:31,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:31,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579405988] [2022-03-18 00:15:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:31,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:32,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:32,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:32,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579405988] [2022-03-18 00:15:32,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579405988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:32,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719026915] [2022-03-18 00:15:32,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:15:32,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:32,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:32,087 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:32,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 00:15:32,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:15:32,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:32,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 00:15:32,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:32,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:33,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719026915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:33,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:33,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-03-18 00:15:33,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:33,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2106897197] [2022-03-18 00:15:33,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2106897197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:33,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:33,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-18 00:15:33,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542499302] [2022-03-18 00:15:33,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:33,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 00:15:33,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 00:15:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 00:15:33,494 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:34,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:34,646 INFO L93 Difference]: Finished difference Result 215 states and 246 transitions. [2022-03-18 00:15:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 00:15:34,646 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-03-18 00:15:34,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:34,647 INFO L225 Difference]: With dead ends: 215 [2022-03-18 00:15:34,647 INFO L226 Difference]: Without dead ends: 201 [2022-03-18 00:15:34,648 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4098, Invalid=5214, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 00:15:34,648 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 463 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:34,648 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 26 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:34,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-18 00:15:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 83. [2022-03-18 00:15:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:34,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-03-18 00:15:34,671 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2022-03-18 00:15:34,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:34,671 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-03-18 00:15:34,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:34,672 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-03-18 00:15:34,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-18 00:15:34,672 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:34,672 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:34,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:34,898 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:34,898 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:34,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:34,899 INFO L85 PathProgramCache]: Analyzing trace with hash 672699853, now seen corresponding path program 63 times [2022-03-18 00:15:34,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:34,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1797336657] [2022-03-18 00:15:34,900 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:34,900 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash 672699853, now seen corresponding path program 64 times [2022-03-18 00:15:34,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:34,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11919725] [2022-03-18 00:15:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:34,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:35,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:35,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:35,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11919725] [2022-03-18 00:15:35,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11919725] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:35,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193248980] [2022-03-18 00:15:35,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:15:35,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:35,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:35,346 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:35,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 00:15:35,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:15:35,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:35,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 00:15:35,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:35,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:36,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193248980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:36,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:36,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-03-18 00:15:36,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:36,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1797336657] [2022-03-18 00:15:36,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1797336657] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:36,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:36,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-18 00:15:36,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663487096] [2022-03-18 00:15:36,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:36,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 00:15:36,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:36,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 00:15:36,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 00:15:36,691 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:37,841 INFO L93 Difference]: Finished difference Result 221 states and 253 transitions. [2022-03-18 00:15:37,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 00:15:37,841 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-03-18 00:15:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:37,843 INFO L225 Difference]: With dead ends: 221 [2022-03-18 00:15:37,844 INFO L226 Difference]: Without dead ends: 207 [2022-03-18 00:15:37,844 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4358, Invalid=5542, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 00:15:37,845 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 430 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:37,845 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 51 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:37,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-18 00:15:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 85. [2022-03-18 00:15:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-03-18 00:15:37,879 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2022-03-18 00:15:37,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:37,879 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-03-18 00:15:37,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:37,880 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-03-18 00:15:37,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-18 00:15:37,880 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:37,880 INFO L500 BasicCegarLoop]: trace histogram [32, 32, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:37,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:38,101 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,SelfDestructingSolverStorable34 [2022-03-18 00:15:38,102 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:38,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:38,102 INFO L85 PathProgramCache]: Analyzing trace with hash 457119087, now seen corresponding path program 65 times [2022-03-18 00:15:38,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:38,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1099142786] [2022-03-18 00:15:38,103 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:38,103 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:38,103 INFO L85 PathProgramCache]: Analyzing trace with hash 457119087, now seen corresponding path program 66 times [2022-03-18 00:15:38,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:38,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985128566] [2022-03-18 00:15:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:38,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:38,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:38,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:38,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985128566] [2022-03-18 00:15:38,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985128566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:38,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029269512] [2022-03-18 00:15:38,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:15:38,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:38,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:38,553 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:38,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 00:15:38,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:15:38,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:38,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:15:38,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-03-18 00:15:38,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-03-18 00:15:38,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029269512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:38,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:38,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 7, 7] total 42 [2022-03-18 00:15:38,968 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:38,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1099142786] [2022-03-18 00:15:38,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1099142786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:38,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:38,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-18 00:15:38,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598819321] [2022-03-18 00:15:38,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:38,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 00:15:38,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:38,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 00:15:38,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 00:15:38,970 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:40,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:40,236 INFO L93 Difference]: Finished difference Result 227 states and 260 transitions. [2022-03-18 00:15:40,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 00:15:40,237 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-03-18 00:15:40,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:40,238 INFO L225 Difference]: With dead ends: 227 [2022-03-18 00:15:40,238 INFO L226 Difference]: Without dead ends: 213 [2022-03-18 00:15:40,238 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2035, Invalid=3515, Unknown=0, NotChecked=0, Total=5550 [2022-03-18 00:15:40,239 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 490 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:40,239 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 31 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-18 00:15:40,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 87. [2022-03-18 00:15:40,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 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) [2022-03-18 00:15:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-03-18 00:15:40,274 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2022-03-18 00:15:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:40,275 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-03-18 00:15:40,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-03-18 00:15:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-18 00:15:40,275 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:40,275 INFO L500 BasicCegarLoop]: trace histogram [33, 33, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:40,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-18 00:15:40,491 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,SelfDestructingSolverStorable35 [2022-03-18 00:15:40,491 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:40,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:40,492 INFO L85 PathProgramCache]: Analyzing trace with hash -557566831, now seen corresponding path program 67 times [2022-03-18 00:15:40,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:40,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1149425322] [2022-03-18 00:15:40,493 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:40,493 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:40,493 INFO L85 PathProgramCache]: Analyzing trace with hash -557566831, now seen corresponding path program 68 times [2022-03-18 00:15:40,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:40,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787593250] [2022-03-18 00:15:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:40,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:40,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:40,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:40,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787593250] [2022-03-18 00:15:40,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787593250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:40,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941605688] [2022-03-18 00:15:40,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:15:40,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:40,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:40,965 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:40,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 00:15:41,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:15:41,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:41,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 00:15:41,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:41,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:42,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941605688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:42,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:42,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-03-18 00:15:42,458 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:42,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1149425322] [2022-03-18 00:15:42,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1149425322] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:42,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:42,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-18 00:15:42,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669712709] [2022-03-18 00:15:42,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:42,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 00:15:42,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:42,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 00:15:42,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 00:15:42,460 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:43,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:43,695 INFO L93 Difference]: Finished difference Result 233 states and 267 transitions. [2022-03-18 00:15:43,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 00:15:43,695 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-03-18 00:15:43,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:43,696 INFO L225 Difference]: With dead ends: 233 [2022-03-18 00:15:43,696 INFO L226 Difference]: Without dead ends: 219 [2022-03-18 00:15:43,697 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4902, Invalid=6228, Unknown=0, NotChecked=0, Total=11130 [2022-03-18 00:15:43,697 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 494 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:43,698 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 36 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-18 00:15:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 89. [2022-03-18 00:15:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-03-18 00:15:43,726 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2022-03-18 00:15:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:43,727 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-03-18 00:15:43,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-03-18 00:15:43,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-18 00:15:43,727 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:43,727 INFO L500 BasicCegarLoop]: trace histogram [34, 34, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:43,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:43,934 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,SelfDestructingSolverStorable36 [2022-03-18 00:15:43,934 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:43,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:43,934 INFO L85 PathProgramCache]: Analyzing trace with hash -713157837, now seen corresponding path program 69 times [2022-03-18 00:15:43,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:43,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [447498668] [2022-03-18 00:15:43,936 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:43,936 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:43,936 INFO L85 PathProgramCache]: Analyzing trace with hash -713157837, now seen corresponding path program 70 times [2022-03-18 00:15:43,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:43,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265494805] [2022-03-18 00:15:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:43,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:44,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:44,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265494805] [2022-03-18 00:15:44,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265494805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:44,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227652923] [2022-03-18 00:15:44,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:15:44,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:44,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:44,438 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:44,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-18 00:15:44,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:15:44,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:44,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 00:15:44,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:44,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:46,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227652923] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:46,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:46,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-18 00:15:46,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:46,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [447498668] [2022-03-18 00:15:46,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [447498668] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:46,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:46,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-18 00:15:46,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842028897] [2022-03-18 00:15:46,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:46,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 00:15:46,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:46,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 00:15:46,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 00:15:46,026 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:47,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:47,463 INFO L93 Difference]: Finished difference Result 239 states and 274 transitions. [2022-03-18 00:15:47,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 00:15:47,463 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-03-18 00:15:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:47,464 INFO L225 Difference]: With dead ends: 239 [2022-03-18 00:15:47,464 INFO L226 Difference]: Without dead ends: 225 [2022-03-18 00:15:47,465 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5186, Invalid=6586, Unknown=0, NotChecked=0, Total=11772 [2022-03-18 00:15:47,466 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 507 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:47,466 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 36 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:47,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-18 00:15:47,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 91. [2022-03-18 00:15:47,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:47,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-03-18 00:15:47,501 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2022-03-18 00:15:47,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:47,501 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-03-18 00:15:47,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-03-18 00:15:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-18 00:15:47,502 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:47,502 INFO L500 BasicCegarLoop]: trace histogram [35, 35, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:47,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-18 00:15:47,702 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:47,702 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:47,703 INFO L85 PathProgramCache]: Analyzing trace with hash 87740757, now seen corresponding path program 71 times [2022-03-18 00:15:47,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:47,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1061980666] [2022-03-18 00:15:47,704 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:47,704 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash 87740757, now seen corresponding path program 72 times [2022-03-18 00:15:47,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:47,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636260810] [2022-03-18 00:15:47,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:47,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:48,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:48,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:48,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636260810] [2022-03-18 00:15:48,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636260810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:48,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543256551] [2022-03-18 00:15:48,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:15:48,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:48,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:48,259 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:48,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-18 00:15:48,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:15:48,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:48,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:15:48,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-03-18 00:15:48,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-03-18 00:15:48,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543256551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:48,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:48,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 7, 7] total 45 [2022-03-18 00:15:48,726 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:48,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1061980666] [2022-03-18 00:15:48,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1061980666] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:48,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:48,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-18 00:15:48,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420668916] [2022-03-18 00:15:48,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:48,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 00:15:48,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:48,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 00:15:48,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 00:15:48,728 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:50,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:50,140 INFO L93 Difference]: Finished difference Result 245 states and 281 transitions. [2022-03-18 00:15:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 00:15:50,141 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-03-18 00:15:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:50,142 INFO L225 Difference]: With dead ends: 245 [2022-03-18 00:15:50,142 INFO L226 Difference]: Without dead ends: 231 [2022-03-18 00:15:50,142 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2380, Invalid=4100, Unknown=0, NotChecked=0, Total=6480 [2022-03-18 00:15:50,143 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 575 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:50,143 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 31 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:15:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-18 00:15:50,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 93. [2022-03-18 00:15:50,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:50,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-03-18 00:15:50,178 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2022-03-18 00:15:50,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:50,178 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-03-18 00:15:50,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:50,179 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-03-18 00:15:50,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-18 00:15:50,179 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:50,179 INFO L500 BasicCegarLoop]: trace histogram [36, 36, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:50,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-18 00:15:50,379 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,SelfDestructingSolverStorable38 [2022-03-18 00:15:50,380 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:50,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:50,380 INFO L85 PathProgramCache]: Analyzing trace with hash 952143607, now seen corresponding path program 73 times [2022-03-18 00:15:50,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:50,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [82065468] [2022-03-18 00:15:50,381 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:50,382 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:50,382 INFO L85 PathProgramCache]: Analyzing trace with hash 952143607, now seen corresponding path program 74 times [2022-03-18 00:15:50,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:50,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728383075] [2022-03-18 00:15:50,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:50,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:50,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:50,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:50,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728383075] [2022-03-18 00:15:50,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728383075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:50,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707065891] [2022-03-18 00:15:50,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:15:50,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:50,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:50,921 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:50,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-18 00:15:51,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:15:51,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:51,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 00:15:51,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:51,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:52,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707065891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:52,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:52,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-03-18 00:15:52,774 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:52,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [82065468] [2022-03-18 00:15:52,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [82065468] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:52,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:52,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-18 00:15:52,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849807478] [2022-03-18 00:15:52,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:52,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 00:15:52,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:52,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 00:15:52,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-03-18 00:15:52,776 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:54,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:54,338 INFO L93 Difference]: Finished difference Result 251 states and 288 transitions. [2022-03-18 00:15:54,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 00:15:54,338 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-03-18 00:15:54,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:54,343 INFO L225 Difference]: With dead ends: 251 [2022-03-18 00:15:54,343 INFO L226 Difference]: Without dead ends: 237 [2022-03-18 00:15:54,344 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5778, Invalid=7332, Unknown=0, NotChecked=0, Total=13110 [2022-03-18 00:15:54,344 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 556 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:54,344 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 36 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:15:54,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-18 00:15:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 95. [2022-03-18 00:15:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-03-18 00:15:54,379 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2022-03-18 00:15:54,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:54,380 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-03-18 00:15:54,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:54,380 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-03-18 00:15:54,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-18 00:15:54,380 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:54,380 INFO L500 BasicCegarLoop]: trace histogram [37, 37, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:54,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:54,581 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,SelfDestructingSolverStorable39 [2022-03-18 00:15:54,581 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:54,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:54,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1580372967, now seen corresponding path program 75 times [2022-03-18 00:15:54,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:54,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1917310764] [2022-03-18 00:15:54,583 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:54,583 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:54,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1580372967, now seen corresponding path program 76 times [2022-03-18 00:15:54,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:54,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268348278] [2022-03-18 00:15:54,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:54,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:55,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:55,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:55,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268348278] [2022-03-18 00:15:55,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268348278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:55,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058293151] [2022-03-18 00:15:55,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:15:55,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:55,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:55,130 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:55,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-18 00:15:55,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:15:55,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:55,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 00:15:55,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:55,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:56,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058293151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:56,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:56,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-18 00:15:56,945 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:56,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1917310764] [2022-03-18 00:15:56,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1917310764] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:56,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:56,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-18 00:15:56,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353928617] [2022-03-18 00:15:56,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:56,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 00:15:56,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:56,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 00:15:56,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 00:15:56,946 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:58,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:58,568 INFO L93 Difference]: Finished difference Result 257 states and 295 transitions. [2022-03-18 00:15:58,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 00:15:58,569 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-03-18 00:15:58,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:58,570 INFO L225 Difference]: With dead ends: 257 [2022-03-18 00:15:58,570 INFO L226 Difference]: Without dead ends: 243 [2022-03-18 00:15:58,570 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6086, Invalid=7720, Unknown=0, NotChecked=0, Total=13806 [2022-03-18 00:15:58,571 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 849 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:58,571 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 31 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:15:58,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-18 00:15:58,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 97. [2022-03-18 00:15:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 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) [2022-03-18 00:15:58,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-03-18 00:15:58,610 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2022-03-18 00:15:58,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:58,610 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-03-18 00:15:58,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:58,610 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-03-18 00:15:58,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-18 00:15:58,611 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:58,611 INFO L500 BasicCegarLoop]: trace histogram [38, 38, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:58,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-18 00:15:58,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:58,812 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:58,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:58,812 INFO L85 PathProgramCache]: Analyzing trace with hash -82343749, now seen corresponding path program 77 times [2022-03-18 00:15:58,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:58,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1005140325] [2022-03-18 00:15:58,814 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:15:58,814 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:15:58,814 INFO L85 PathProgramCache]: Analyzing trace with hash -82343749, now seen corresponding path program 78 times [2022-03-18 00:15:58,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:58,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450283982] [2022-03-18 00:15:58,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:58,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:15:59,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:59,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450283982] [2022-03-18 00:15:59,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450283982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:59,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222610267] [2022-03-18 00:15:59,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:15:59,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:59,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:59,428 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:59,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-18 00:15:59,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:15:59,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:59,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:15:59,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2022-03-18 00:15:59,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2022-03-18 00:15:59,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222610267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:59,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:59,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 7, 7] total 48 [2022-03-18 00:15:59,936 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:59,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1005140325] [2022-03-18 00:15:59,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1005140325] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:59,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:59,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-18 00:15:59,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821100243] [2022-03-18 00:15:59,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:59,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 00:15:59,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:59,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 00:15:59,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 00:15:59,940 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:16:01,709 INFO L93 Difference]: Finished difference Result 263 states and 302 transitions. [2022-03-18 00:16:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 00:16:01,710 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-03-18 00:16:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:16:01,710 INFO L225 Difference]: With dead ends: 263 [2022-03-18 00:16:01,710 INFO L226 Difference]: Without dead ends: 249 [2022-03-18 00:16:01,711 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2752, Invalid=4730, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 00:16:01,711 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 527 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:16:01,711 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 51 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:16:01,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-18 00:16:01,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 99. [2022-03-18 00:16:01,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:01,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-03-18 00:16:01,745 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2022-03-18 00:16:01,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:16:01,746 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-03-18 00:16:01,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:01,746 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-03-18 00:16:01,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-18 00:16:01,746 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:16:01,746 INFO L500 BasicCegarLoop]: trace histogram [39, 39, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:16:01,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-18 00:16:01,946 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,SelfDestructingSolverStorable41 [2022-03-18 00:16:01,947 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:16:01,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:16:01,947 INFO L85 PathProgramCache]: Analyzing trace with hash 709690589, now seen corresponding path program 79 times [2022-03-18 00:16:01,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:01,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [649603707] [2022-03-18 00:16:01,949 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:16:01,949 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:16:01,949 INFO L85 PathProgramCache]: Analyzing trace with hash 709690589, now seen corresponding path program 80 times [2022-03-18 00:16:01,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:01,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637220560] [2022-03-18 00:16:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:01,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:02,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:16:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:02,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:16:02,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637220560] [2022-03-18 00:16:02,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637220560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:16:02,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906790309] [2022-03-18 00:16:02,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:16:02,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:02,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:16:02,588 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:16:02,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-18 00:16:02,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:16:02,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:16:02,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 00:16:02,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:16:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:02,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:16:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:04,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906790309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:16:04,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:16:04,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-03-18 00:16:04,547 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:16:04,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [649603707] [2022-03-18 00:16:04,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [649603707] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:16:04,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:16:04,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-18 00:16:04,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228740427] [2022-03-18 00:16:04,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:16:04,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 00:16:04,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:04,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 00:16:04,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 00:16:04,548 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:06,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:16:06,348 INFO L93 Difference]: Finished difference Result 269 states and 309 transitions. [2022-03-18 00:16:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 00:16:06,348 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-03-18 00:16:06,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:16:06,349 INFO L225 Difference]: With dead ends: 269 [2022-03-18 00:16:06,349 INFO L226 Difference]: Without dead ends: 255 [2022-03-18 00:16:06,350 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6726, Invalid=8526, Unknown=0, NotChecked=0, Total=15252 [2022-03-18 00:16:06,350 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 644 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:16:06,350 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 31 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:16:06,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-18 00:16:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 101. [2022-03-18 00:16:06,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:06,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-03-18 00:16:06,402 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2022-03-18 00:16:06,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:16:06,402 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-03-18 00:16:06,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:06,402 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-03-18 00:16:06,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-18 00:16:06,403 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:16:06,403 INFO L500 BasicCegarLoop]: trace histogram [40, 40, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:16:06,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-18 00:16:06,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:06,619 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:16:06,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:16:06,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1645478015, now seen corresponding path program 81 times [2022-03-18 00:16:06,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:06,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [308054078] [2022-03-18 00:16:06,621 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:16:06,621 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:16:06,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1645478015, now seen corresponding path program 82 times [2022-03-18 00:16:06,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:06,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836253871] [2022-03-18 00:16:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:06,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:07,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:16:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1607 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:07,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:16:07,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836253871] [2022-03-18 00:16:07,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836253871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:16:07,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945603766] [2022-03-18 00:16:07,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:16:07,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:07,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:16:07,360 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:16:07,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-18 00:16:07,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:16:07,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:16:07,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 00:16:07,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:16:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1607 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:07,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:16:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1607 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:09,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945603766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:16:09,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:16:09,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-03-18 00:16:09,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:16:09,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [308054078] [2022-03-18 00:16:09,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [308054078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:16:09,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:16:09,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-18 00:16:09,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567600101] [2022-03-18 00:16:09,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:16:09,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-18 00:16:09,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:09,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-18 00:16:09,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 00:16:09,398 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:11,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:16:11,312 INFO L93 Difference]: Finished difference Result 275 states and 316 transitions. [2022-03-18 00:16:11,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 00:16:11,312 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-03-18 00:16:11,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:16:11,313 INFO L225 Difference]: With dead ends: 275 [2022-03-18 00:16:11,313 INFO L226 Difference]: Without dead ends: 261 [2022-03-18 00:16:11,314 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7058, Invalid=8944, Unknown=0, NotChecked=0, Total=16002 [2022-03-18 00:16:11,314 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 497 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:16:11,314 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 61 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:16:11,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-18 00:16:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 103. [2022-03-18 00:16:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-03-18 00:16:11,355 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2022-03-18 00:16:11,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:16:11,356 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-03-18 00:16:11,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-03-18 00:16:11,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-18 00:16:11,356 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:16:11,357 INFO L500 BasicCegarLoop]: trace histogram [41, 41, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:16:11,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-18 00:16:11,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:11,571 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:16:11,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:16:11,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1005937759, now seen corresponding path program 83 times [2022-03-18 00:16:11,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:11,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1588859374] [2022-03-18 00:16:11,573 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:16:11,573 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:16:11,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1005937759, now seen corresponding path program 84 times [2022-03-18 00:16:11,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:11,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500794884] [2022-03-18 00:16:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:11,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:12,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:16:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1688 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:12,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:16:12,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500794884] [2022-03-18 00:16:12,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500794884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:16:12,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83556879] [2022-03-18 00:16:12,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:16:12,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:12,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:16:12,225 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:16:12,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-18 00:16:12,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:16:12,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:16:12,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:16:12,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:16:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1688 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2022-03-18 00:16:12,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:16:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1688 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2022-03-18 00:16:12,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83556879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:16:12,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:16:12,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 7, 7] total 51 [2022-03-18 00:16:12,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:16:12,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1588859374] [2022-03-18 00:16:12,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1588859374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:16:12,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:16:12,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-18 00:16:12,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410163438] [2022-03-18 00:16:12,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:16:12,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 00:16:12,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:12,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 00:16:12,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 00:16:12,784 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:16:14,843 INFO L93 Difference]: Finished difference Result 281 states and 323 transitions. [2022-03-18 00:16:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-18 00:16:14,843 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-18 00:16:14,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:16:14,844 INFO L225 Difference]: With dead ends: 281 [2022-03-18 00:16:14,844 INFO L226 Difference]: Without dead ends: 267 [2022-03-18 00:16:14,844 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3151, Invalid=5405, Unknown=0, NotChecked=0, Total=8556 [2022-03-18 00:16:14,845 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 505 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:16:14,845 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 71 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:16:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-18 00:16:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 105. [2022-03-18 00:16:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-03-18 00:16:14,888 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2022-03-18 00:16:14,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:16:14,888 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-03-18 00:16:14,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:14,888 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-03-18 00:16:14,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 00:16:14,888 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:16:14,888 INFO L500 BasicCegarLoop]: trace histogram [42, 42, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:16:14,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-18 00:16:15,089 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,SelfDestructingSolverStorable44 [2022-03-18 00:16:15,089 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:16:15,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:16:15,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2100890045, now seen corresponding path program 85 times [2022-03-18 00:16:15,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:15,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1791275215] [2022-03-18 00:16:15,091 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:16:15,091 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:16:15,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2100890045, now seen corresponding path program 86 times [2022-03-18 00:16:15,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:15,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789383819] [2022-03-18 00:16:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:15,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:15,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:16:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:15,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:16:15,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789383819] [2022-03-18 00:16:15,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789383819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:16:15,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553938176] [2022-03-18 00:16:15,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:16:15,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:15,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:16:15,798 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:16:15,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-18 00:16:16,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:16:16,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:16:16,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-18 00:16:16,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:16:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:16,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:16:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:18,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553938176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:16:18,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:16:18,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-03-18 00:16:18,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:16:18,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1791275215] [2022-03-18 00:16:18,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1791275215] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:16:18,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:16:18,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-18 00:16:18,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917128829] [2022-03-18 00:16:18,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:16:18,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-18 00:16:18,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:18,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-18 00:16:18,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 00:16:18,094 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:20,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:16:20,351 INFO L93 Difference]: Finished difference Result 287 states and 330 transitions. [2022-03-18 00:16:20,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 00:16:20,351 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-03-18 00:16:20,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:16:20,352 INFO L225 Difference]: With dead ends: 287 [2022-03-18 00:16:20,352 INFO L226 Difference]: Without dead ends: 273 [2022-03-18 00:16:20,353 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7746, Invalid=9810, Unknown=0, NotChecked=0, Total=17556 [2022-03-18 00:16:20,353 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 628 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:16:20,354 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 41 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:16:20,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-18 00:16:20,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 107. [2022-03-18 00:16:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:20,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-03-18 00:16:20,397 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2022-03-18 00:16:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:16:20,397 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-03-18 00:16:20,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:20,397 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-03-18 00:16:20,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-18 00:16:20,397 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:16:20,398 INFO L500 BasicCegarLoop]: trace histogram [43, 43, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:16:20,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-18 00:16:20,598 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,SelfDestructingSolverStorable45 [2022-03-18 00:16:20,598 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:16:20,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:16:20,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2083049371, now seen corresponding path program 87 times [2022-03-18 00:16:20,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:20,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [930855305] [2022-03-18 00:16:20,600 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:16:20,600 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:16:20,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2083049371, now seen corresponding path program 88 times [2022-03-18 00:16:20,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:20,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293652108] [2022-03-18 00:16:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:20,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:21,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:16:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:21,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:16:21,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293652108] [2022-03-18 00:16:21,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293652108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:16:21,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374680345] [2022-03-18 00:16:21,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:16:21,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:21,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:16:21,320 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:16:21,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-18 00:16:21,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:16:21,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:16:21,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 00:16:21,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:16:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:21,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:16:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:23,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374680345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:16:23,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:16:23,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-03-18 00:16:23,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:16:23,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [930855305] [2022-03-18 00:16:23,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [930855305] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:16:23,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:16:23,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-18 00:16:23,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400205656] [2022-03-18 00:16:23,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:16:23,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 00:16:23,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:23,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 00:16:23,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 00:16:23,643 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:26,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:16:26,093 INFO L93 Difference]: Finished difference Result 293 states and 337 transitions. [2022-03-18 00:16:26,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 00:16:26,093 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-03-18 00:16:26,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:16:26,094 INFO L225 Difference]: With dead ends: 293 [2022-03-18 00:16:26,094 INFO L226 Difference]: Without dead ends: 279 [2022-03-18 00:16:26,095 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8102, Invalid=10258, Unknown=0, NotChecked=0, Total=18360 [2022-03-18 00:16:26,095 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 590 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:16:26,096 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 51 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:16:26,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-18 00:16:26,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 109. [2022-03-18 00:16:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-03-18 00:16:26,154 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2022-03-18 00:16:26,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:16:26,154 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-03-18 00:16:26,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:26,154 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-03-18 00:16:26,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-18 00:16:26,155 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:16:26,155 INFO L500 BasicCegarLoop]: trace histogram [44, 44, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:16:26,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-18 00:16:26,370 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,SelfDestructingSolverStorable46 [2022-03-18 00:16:26,371 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:16:26,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:16:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2118030841, now seen corresponding path program 89 times [2022-03-18 00:16:26,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:26,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1366105714] [2022-03-18 00:16:26,373 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:16:26,373 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:16:26,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2118030841, now seen corresponding path program 90 times [2022-03-18 00:16:26,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:26,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377895348] [2022-03-18 00:16:26,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:26,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:27,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:16:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1943 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:27,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:16:27,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377895348] [2022-03-18 00:16:27,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377895348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:16:27,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617984251] [2022-03-18 00:16:27,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:16:27,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:27,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:16:27,248 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:16:27,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-18 00:16:27,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:16:27,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:16:27,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:16:27,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:16:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1943 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-03-18 00:16:27,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:16:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1943 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-03-18 00:16:27,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617984251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:16:27,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:16:27,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 7, 7] total 54 [2022-03-18 00:16:27,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:16:27,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1366105714] [2022-03-18 00:16:27,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1366105714] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:16:27,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:16:27,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-18 00:16:27,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101355757] [2022-03-18 00:16:27,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:16:27,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-18 00:16:27,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:27,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-18 00:16:27,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1281, Invalid=1581, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:16:27,944 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:30,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:16:30,486 INFO L93 Difference]: Finished difference Result 299 states and 344 transitions. [2022-03-18 00:16:30,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 00:16:30,486 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-03-18 00:16:30,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:16:30,488 INFO L225 Difference]: With dead ends: 299 [2022-03-18 00:16:30,488 INFO L226 Difference]: Without dead ends: 285 [2022-03-18 00:16:30,489 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3577, Invalid=6125, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 00:16:30,489 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 700 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:16:30,489 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 36 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:16:30,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-18 00:16:30,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 111. [2022-03-18 00:16:30,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 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) [2022-03-18 00:16:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-03-18 00:16:30,545 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2022-03-18 00:16:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:16:30,546 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-03-18 00:16:30,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:30,546 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-03-18 00:16:30,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 00:16:30,546 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:16:30,546 INFO L500 BasicCegarLoop]: trace histogram [45, 45, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:16:30,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-18 00:16:30,754 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:30,754 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:16:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:16:30,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1375485143, now seen corresponding path program 91 times [2022-03-18 00:16:30,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:30,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1055044221] [2022-03-18 00:16:30,756 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:16:30,756 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:16:30,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1375485143, now seen corresponding path program 92 times [2022-03-18 00:16:30,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:30,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045289456] [2022-03-18 00:16:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:30,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:31,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:16:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:31,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:16:31,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045289456] [2022-03-18 00:16:31,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045289456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:16:31,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313799996] [2022-03-18 00:16:31,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:16:31,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:31,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:16:31,562 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:16:31,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-18 00:16:31,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:16:31,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:16:31,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 00:16:31,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:16:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:31,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:16:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:34,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313799996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:16:34,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:16:34,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-03-18 00:16:34,072 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:16:34,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1055044221] [2022-03-18 00:16:34,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1055044221] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:16:34,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:16:34,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-18 00:16:34,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695447225] [2022-03-18 00:16:34,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:16:34,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 00:16:34,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:34,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 00:16:34,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 00:16:34,073 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:16:36,750 INFO L93 Difference]: Finished difference Result 305 states and 351 transitions. [2022-03-18 00:16:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-18 00:16:36,750 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-03-18 00:16:36,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:16:36,752 INFO L225 Difference]: With dead ends: 305 [2022-03-18 00:16:36,752 INFO L226 Difference]: Without dead ends: 291 [2022-03-18 00:16:36,753 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8838, Invalid=11184, Unknown=0, NotChecked=0, Total=20022 [2022-03-18 00:16:36,753 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 680 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:16:36,753 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 51 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:16:36,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-18 00:16:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 113. [2022-03-18 00:16:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 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) [2022-03-18 00:16:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2022-03-18 00:16:36,805 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2022-03-18 00:16:36,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:16:36,805 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2022-03-18 00:16:36,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:36,805 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2022-03-18 00:16:36,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-03-18 00:16:36,806 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:16:36,806 INFO L500 BasicCegarLoop]: trace histogram [46, 46, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:16:36,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-18 00:16:37,031 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,SelfDestructingSolverStorable48 [2022-03-18 00:16:37,031 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:16:37,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:16:37,032 INFO L85 PathProgramCache]: Analyzing trace with hash -753640501, now seen corresponding path program 93 times [2022-03-18 00:16:37,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:37,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1926962244] [2022-03-18 00:16:37,033 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:16:37,034 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:16:37,034 INFO L85 PathProgramCache]: Analyzing trace with hash -753640501, now seen corresponding path program 94 times [2022-03-18 00:16:37,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:37,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037948337] [2022-03-18 00:16:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:37,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:37,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:16:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:37,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:16:37,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037948337] [2022-03-18 00:16:37,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037948337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:16:37,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096906477] [2022-03-18 00:16:37,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:16:37,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:37,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:16:37,893 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:16:37,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-18 00:16:38,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:16:38,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:16:38,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-18 00:16:38,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:16:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:38,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:16:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:40,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096906477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:16:40,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:16:40,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-18 00:16:40,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:16:40,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1926962244] [2022-03-18 00:16:40,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1926962244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:16:40,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:16:40,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-18 00:16:40,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683668131] [2022-03-18 00:16:40,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:16:40,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-18 00:16:40,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:40,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-18 00:16:40,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 00:16:40,519 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:16:43,449 INFO L93 Difference]: Finished difference Result 311 states and 358 transitions. [2022-03-18 00:16:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-18 00:16:43,449 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2022-03-18 00:16:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:16:43,450 INFO L225 Difference]: With dead ends: 311 [2022-03-18 00:16:43,450 INFO L226 Difference]: Without dead ends: 297 [2022-03-18 00:16:43,451 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9218, Invalid=11662, Unknown=0, NotChecked=0, Total=20880 [2022-03-18 00:16:43,452 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 939 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:16:43,452 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 26 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:16:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-18 00:16:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 115. [2022-03-18 00:16:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-03-18 00:16:43,507 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2022-03-18 00:16:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:16:43,507 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-03-18 00:16:43,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:43,508 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-03-18 00:16:43,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-18 00:16:43,508 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:16:43,508 INFO L500 BasicCegarLoop]: trace histogram [47, 47, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:16:43,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-18 00:16:43,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-18 00:16:43,709 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:16:43,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:16:43,709 INFO L85 PathProgramCache]: Analyzing trace with hash -161393683, now seen corresponding path program 95 times [2022-03-18 00:16:43,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:43,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1876383696] [2022-03-18 00:16:43,710 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:16:43,710 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:16:43,710 INFO L85 PathProgramCache]: Analyzing trace with hash -161393683, now seen corresponding path program 96 times [2022-03-18 00:16:43,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:43,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274681111] [2022-03-18 00:16:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:43,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:16:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:44,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:16:44,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274681111] [2022-03-18 00:16:44,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274681111] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:16:44,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625861538] [2022-03-18 00:16:44,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:16:44,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:44,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:16:44,569 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:16:44,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-18 00:16:44,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:16:44,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:16:44,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:16:44,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:16:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2022-03-18 00:16:44,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:16:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2022-03-18 00:16:45,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625861538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:16:45,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:16:45,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 7, 7] total 57 [2022-03-18 00:16:45,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:16:45,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1876383696] [2022-03-18 00:16:45,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1876383696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:16:45,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:16:45,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-18 00:16:45,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274866182] [2022-03-18 00:16:45,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:16:45,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 00:16:45,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:45,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 00:16:45,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=1755, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 00:16:45,182 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:48,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:16:48,255 INFO L93 Difference]: Finished difference Result 317 states and 365 transitions. [2022-03-18 00:16:48,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-18 00:16:48,255 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-03-18 00:16:48,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:16:48,256 INFO L225 Difference]: With dead ends: 317 [2022-03-18 00:16:48,257 INFO L226 Difference]: Without dead ends: 303 [2022-03-18 00:16:48,257 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4030, Invalid=6890, Unknown=0, NotChecked=0, Total=10920 [2022-03-18 00:16:48,258 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 697 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:16:48,258 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 36 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:16:48,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-18 00:16:48,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 117. [2022-03-18 00:16:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-03-18 00:16:48,325 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2022-03-18 00:16:48,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:16:48,325 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-03-18 00:16:48,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:48,325 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-03-18 00:16:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-18 00:16:48,325 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:16:48,325 INFO L500 BasicCegarLoop]: trace histogram [48, 48, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:16:48,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-03-18 00:16:48,526 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:48,526 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:16:48,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:16:48,526 INFO L85 PathProgramCache]: Analyzing trace with hash 2052115343, now seen corresponding path program 97 times [2022-03-18 00:16:48,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:48,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1088331084] [2022-03-18 00:16:48,528 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:16:48,528 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:16:48,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2052115343, now seen corresponding path program 98 times [2022-03-18 00:16:48,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:48,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248245483] [2022-03-18 00:16:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:48,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:49,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:16:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:49,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:16:49,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248245483] [2022-03-18 00:16:49,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248245483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:16:49,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310131956] [2022-03-18 00:16:49,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:16:49,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:49,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:16:49,507 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:16:49,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-18 00:16:49,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:16:49,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:16:49,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-18 00:16:49,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:16:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:49,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:16:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:52,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310131956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:16:52,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:16:52,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-03-18 00:16:52,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:16:52,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1088331084] [2022-03-18 00:16:52,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1088331084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:16:52,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:16:52,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-18 00:16:52,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145432229] [2022-03-18 00:16:52,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:16:52,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-18 00:16:52,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:52,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-18 00:16:52,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 00:16:52,320 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:16:55,399 INFO L93 Difference]: Finished difference Result 323 states and 372 transitions. [2022-03-18 00:16:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-18 00:16:55,399 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-03-18 00:16:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:16:55,400 INFO L225 Difference]: With dead ends: 323 [2022-03-18 00:16:55,400 INFO L226 Difference]: Without dead ends: 309 [2022-03-18 00:16:55,401 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10002, Invalid=12648, Unknown=0, NotChecked=0, Total=22650 [2022-03-18 00:16:55,402 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 760 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:16:55,402 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 46 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:16:55,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-03-18 00:16:55,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 119. [2022-03-18 00:16:55,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:55,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-03-18 00:16:55,468 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2022-03-18 00:16:55,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:16:55,468 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-03-18 00:16:55,468 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:16:55,468 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-03-18 00:16:55,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-18 00:16:55,469 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:16:55,469 INFO L500 BasicCegarLoop]: trace histogram [49, 49, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:16:55,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-18 00:16:55,669 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,SelfDestructingSolverStorable51 [2022-03-18 00:16:55,669 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:16:55,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:16:55,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1069489487, now seen corresponding path program 99 times [2022-03-18 00:16:55,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:55,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1534693564] [2022-03-18 00:16:55,671 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:16:55,671 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:16:55,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1069489487, now seen corresponding path program 100 times [2022-03-18 00:16:55,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:55,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074221701] [2022-03-18 00:16:55,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:55,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:56,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:16:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:56,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:16:56,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074221701] [2022-03-18 00:16:56,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074221701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:16:56,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049132978] [2022-03-18 00:16:56,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:16:56,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:56,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:16:56,644 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:16:56,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-18 00:16:56,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:16:56,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:16:56,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 00:16:56,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:16:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:57,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:16:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:16:59,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049132978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:16:59,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:16:59,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-03-18 00:16:59,559 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:16:59,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1534693564] [2022-03-18 00:16:59,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1534693564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:16:59,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:16:59,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-18 00:16:59,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436471322] [2022-03-18 00:16:59,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:16:59,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 00:16:59,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:59,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 00:16:59,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:16:59,561 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:03,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:17:03,015 INFO L93 Difference]: Finished difference Result 329 states and 379 transitions. [2022-03-18 00:17:03,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-18 00:17:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-03-18 00:17:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:17:03,016 INFO L225 Difference]: With dead ends: 329 [2022-03-18 00:17:03,016 INFO L226 Difference]: Without dead ends: 315 [2022-03-18 00:17:03,017 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-03-18 00:17:03,018 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 757 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:17:03,018 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 26 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:17:03,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-03-18 00:17:03,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 121. [2022-03-18 00:17:03,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 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) [2022-03-18 00:17:03,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-03-18 00:17:03,073 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2022-03-18 00:17:03,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:17:03,074 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-03-18 00:17:03,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:03,074 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-03-18 00:17:03,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-18 00:17:03,074 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:17:03,074 INFO L500 BasicCegarLoop]: trace histogram [50, 50, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:17:03,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-18 00:17:03,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:17:03,275 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:17:03,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:17:03,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1250408787, now seen corresponding path program 101 times [2022-03-18 00:17:03,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:03,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1274045000] [2022-03-18 00:17:03,277 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:17:03,277 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:17:03,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1250408787, now seen corresponding path program 102 times [2022-03-18 00:17:03,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:17:03,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001903462] [2022-03-18 00:17:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:17:03,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:17:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:04,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:17:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2507 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:04,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:17:04,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001903462] [2022-03-18 00:17:04,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001903462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:17:04,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030859741] [2022-03-18 00:17:04,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:17:04,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:17:04,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:17:04,290 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:17:04,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-18 00:17:04,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:17:04,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:17:04,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:17:04,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:17:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2507 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-03-18 00:17:04,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:17:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2507 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-03-18 00:17:04,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030859741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:17:04,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:17:04,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 7, 7] total 60 [2022-03-18 00:17:04,949 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:17:04,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1274045000] [2022-03-18 00:17:04,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1274045000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:17:04,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:17:04,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-18 00:17:04,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676135441] [2022-03-18 00:17:04,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:17:04,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-18 00:17:04,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:04,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-18 00:17:04,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1602, Invalid=1938, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 00:17:04,951 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:08,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:17:08,308 INFO L93 Difference]: Finished difference Result 335 states and 386 transitions. [2022-03-18 00:17:08,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-18 00:17:08,308 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-03-18 00:17:08,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:17:08,310 INFO L225 Difference]: With dead ends: 335 [2022-03-18 00:17:08,310 INFO L226 Difference]: Without dead ends: 321 [2022-03-18 00:17:08,311 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4510, Invalid=7700, Unknown=0, NotChecked=0, Total=12210 [2022-03-18 00:17:08,311 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 775 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:17:08,311 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 31 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:17:08,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-18 00:17:08,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 123. [2022-03-18 00:17:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 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) [2022-03-18 00:17:08,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2022-03-18 00:17:08,389 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2022-03-18 00:17:08,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:17:08,389 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2022-03-18 00:17:08,389 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:08,389 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2022-03-18 00:17:08,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-18 00:17:08,389 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:17:08,389 INFO L500 BasicCegarLoop]: trace histogram [51, 51, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:17:08,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-18 00:17:08,590 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,SelfDestructingSolverStorable53 [2022-03-18 00:17:08,590 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:17:08,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:17:08,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1584623477, now seen corresponding path program 103 times [2022-03-18 00:17:08,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:08,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1946747730] [2022-03-18 00:17:08,592 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:17:08,592 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:17:08,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1584623477, now seen corresponding path program 104 times [2022-03-18 00:17:08,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:17:08,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697883946] [2022-03-18 00:17:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:17:08,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:17:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:09,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:17:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2608 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:09,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:17:09,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697883946] [2022-03-18 00:17:09,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697883946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:17:09,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697460775] [2022-03-18 00:17:09,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:17:09,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:17:09,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:17:09,538 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:17:09,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-18 00:17:09,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:17:09,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:17:09,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 00:17:09,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:17:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2608 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:10,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:17:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2608 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:12,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697460775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:17:12,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:17:12,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-03-18 00:17:12,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:17:12,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1946747730] [2022-03-18 00:17:12,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1946747730] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:17:12,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:17:12,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-18 00:17:12,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959009621] [2022-03-18 00:17:12,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:17:12,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 00:17:12,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:12,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 00:17:12,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-03-18 00:17:12,710 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:16,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:17:16,285 INFO L93 Difference]: Finished difference Result 341 states and 393 transitions. [2022-03-18 00:17:16,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-18 00:17:16,286 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-03-18 00:17:16,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:17:16,287 INFO L225 Difference]: With dead ends: 341 [2022-03-18 00:17:16,287 INFO L226 Difference]: Without dead ends: 327 [2022-03-18 00:17:16,288 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11238, Invalid=14202, Unknown=0, NotChecked=0, Total=25440 [2022-03-18 00:17:16,288 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 827 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:17:16,288 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 31 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:17:16,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-03-18 00:17:16,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 125. [2022-03-18 00:17:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-03-18 00:17:16,378 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2022-03-18 00:17:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:17:16,378 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-03-18 00:17:16,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-03-18 00:17:16,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-18 00:17:16,379 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:17:16,379 INFO L500 BasicCegarLoop]: trace histogram [52, 52, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:17:16,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-18 00:17:16,599 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,SelfDestructingSolverStorable54 [2022-03-18 00:17:16,599 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:17:16,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:17:16,600 INFO L85 PathProgramCache]: Analyzing trace with hash 642393367, now seen corresponding path program 105 times [2022-03-18 00:17:16,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:16,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1493848419] [2022-03-18 00:17:16,601 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:17:16,601 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:17:16,601 INFO L85 PathProgramCache]: Analyzing trace with hash 642393367, now seen corresponding path program 106 times [2022-03-18 00:17:16,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:17:16,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8128061] [2022-03-18 00:17:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:17:16,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:17:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:17,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:17:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2711 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:17,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:17:17,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8128061] [2022-03-18 00:17:17,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8128061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:17:17,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534749178] [2022-03-18 00:17:17,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:17:17,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:17:17,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:17:17,595 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:17:17,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-18 00:17:17,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:17:17,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:17:17,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-18 00:17:17,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:17:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2711 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:18,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:17:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2711 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:20,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534749178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:17:20,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:17:20,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-03-18 00:17:20,811 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:17:20,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1493848419] [2022-03-18 00:17:20,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1493848419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:17:20,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:17:20,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-18 00:17:20,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386758779] [2022-03-18 00:17:20,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:17:20,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-18 00:17:20,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:20,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-18 00:17:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-03-18 00:17:20,815 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:24,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:17:24,622 INFO L93 Difference]: Finished difference Result 347 states and 400 transitions. [2022-03-18 00:17:24,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-18 00:17:24,623 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-03-18 00:17:24,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:17:24,625 INFO L225 Difference]: With dead ends: 347 [2022-03-18 00:17:24,625 INFO L226 Difference]: Without dead ends: 333 [2022-03-18 00:17:24,626 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11666, Invalid=14740, Unknown=0, NotChecked=0, Total=26406 [2022-03-18 00:17:24,627 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 787 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:17:24,627 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 41 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:17:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-03-18 00:17:24,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 127. [2022-03-18 00:17:24,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-03-18 00:17:24,691 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2022-03-18 00:17:24,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:17:24,691 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-03-18 00:17:24,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:24,692 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-03-18 00:17:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-18 00:17:24,692 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:17:24,692 INFO L500 BasicCegarLoop]: trace histogram [53, 53, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:17:24,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-18 00:17:24,892 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:17:24,893 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:17:24,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:17:24,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1397357113, now seen corresponding path program 107 times [2022-03-18 00:17:24,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:24,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1387727088] [2022-03-18 00:17:24,894 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:17:24,895 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:17:24,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1397357113, now seen corresponding path program 108 times [2022-03-18 00:17:24,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:17:24,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373579967] [2022-03-18 00:17:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:17:24,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:17:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:25,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:17:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2816 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:25,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:17:25,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373579967] [2022-03-18 00:17:25,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373579967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:17:25,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399197811] [2022-03-18 00:17:25,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:17:25,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:17:25,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:17:25,925 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:17:25,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-18 00:17:26,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:17:26,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:17:26,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:17:26,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:17:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2816 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2022-03-18 00:17:26,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:17:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2816 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2022-03-18 00:17:26,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399197811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:17:26,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:17:26,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 7, 7] total 63 [2022-03-18 00:17:26,700 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:17:26,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1387727088] [2022-03-18 00:17:26,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1387727088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:17:26,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:17:26,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-18 00:17:26,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140838036] [2022-03-18 00:17:26,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:17:26,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 00:17:26,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:26,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 00:17:26,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1776, Invalid=2130, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 00:17:26,704 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:17:30,639 INFO L93 Difference]: Finished difference Result 353 states and 407 transitions. [2022-03-18 00:17:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-18 00:17:30,640 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-03-18 00:17:30,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:17:30,641 INFO L225 Difference]: With dead ends: 353 [2022-03-18 00:17:30,641 INFO L226 Difference]: Without dead ends: 339 [2022-03-18 00:17:30,642 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1811 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5017, Invalid=8555, Unknown=0, NotChecked=0, Total=13572 [2022-03-18 00:17:30,642 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 812 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:17:30,642 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 36 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:17:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-03-18 00:17:30,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 129. [2022-03-18 00:17:30,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-03-18 00:17:30,709 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2022-03-18 00:17:30,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:17:30,709 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-03-18 00:17:30,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:30,709 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-03-18 00:17:30,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-18 00:17:30,710 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:17:30,710 INFO L500 BasicCegarLoop]: trace histogram [54, 54, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:17:30,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-18 00:17:30,910 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:17:30,910 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:17:30,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:17:30,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1068043995, now seen corresponding path program 109 times [2022-03-18 00:17:30,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:30,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [397476531] [2022-03-18 00:17:30,912 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:17:30,912 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:17:30,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1068043995, now seen corresponding path program 110 times [2022-03-18 00:17:30,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:17:30,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873947402] [2022-03-18 00:17:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:17:30,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:17:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:32,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:17:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2923 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:32,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:17:32,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873947402] [2022-03-18 00:17:32,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873947402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:17:32,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006177720] [2022-03-18 00:17:32,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:17:32,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:17:32,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:17:32,100 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:17:32,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-18 00:17:32,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:17:32,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:17:32,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-18 00:17:32,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:17:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2923 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:32,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:17:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2923 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:35,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006177720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:17:35,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:17:35,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-03-18 00:17:35,646 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:17:35,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [397476531] [2022-03-18 00:17:35,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [397476531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:17:35,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:17:35,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-18 00:17:35,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499911314] [2022-03-18 00:17:35,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:17:35,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-18 00:17:35,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:35,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-18 00:17:35,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-03-18 00:17:35,648 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:17:40,129 INFO L93 Difference]: Finished difference Result 359 states and 414 transitions. [2022-03-18 00:17:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-18 00:17:40,129 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-03-18 00:17:40,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:17:40,130 INFO L225 Difference]: With dead ends: 359 [2022-03-18 00:17:40,130 INFO L226 Difference]: Without dead ends: 345 [2022-03-18 00:17:40,131 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12546, Invalid=15846, Unknown=0, NotChecked=0, Total=28392 [2022-03-18 00:17:40,132 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 858 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:17:40,132 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 41 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:17:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-18 00:17:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 131. [2022-03-18 00:17:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 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) [2022-03-18 00:17:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2022-03-18 00:17:40,204 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2022-03-18 00:17:40,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:17:40,204 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2022-03-18 00:17:40,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:40,204 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2022-03-18 00:17:40,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-18 00:17:40,204 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:17:40,205 INFO L500 BasicCegarLoop]: trace histogram [55, 55, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:17:40,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-18 00:17:40,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:17:40,405 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:17:40,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:17:40,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1869249795, now seen corresponding path program 111 times [2022-03-18 00:17:40,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:40,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [847906938] [2022-03-18 00:17:40,406 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:17:40,407 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:17:40,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1869249795, now seen corresponding path program 112 times [2022-03-18 00:17:40,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:17:40,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379436051] [2022-03-18 00:17:40,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:17:40,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:17:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:41,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:17:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3032 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:41,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:17:41,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379436051] [2022-03-18 00:17:41,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379436051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:17:41,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907697189] [2022-03-18 00:17:41,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:17:41,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:17:41,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:17:41,528 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:17:41,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-18 00:17:41,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:17:41,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:17:41,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-18 00:17:41,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:17:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3032 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:42,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:17:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3032 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:45,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907697189] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:17:45,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:17:45,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-03-18 00:17:45,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:17:45,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [847906938] [2022-03-18 00:17:45,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [847906938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:17:45,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:17:45,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-18 00:17:45,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135981629] [2022-03-18 00:17:45,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:17:45,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-18 00:17:45,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:45,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-18 00:17:45,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-03-18 00:17:45,125 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:17:49,590 INFO L93 Difference]: Finished difference Result 365 states and 421 transitions. [2022-03-18 00:17:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-18 00:17:49,590 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-03-18 00:17:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:17:49,591 INFO L225 Difference]: With dead ends: 365 [2022-03-18 00:17:49,591 INFO L226 Difference]: Without dead ends: 351 [2022-03-18 00:17:49,592 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12998, Invalid=16414, Unknown=0, NotChecked=0, Total=29412 [2022-03-18 00:17:49,593 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 899 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:17:49,593 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 41 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:17:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-18 00:17:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 133. [2022-03-18 00:17:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2022-03-18 00:17:49,673 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2022-03-18 00:17:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:17:49,673 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2022-03-18 00:17:49,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:49,674 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2022-03-18 00:17:49,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-18 00:17:49,674 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:17:49,674 INFO L500 BasicCegarLoop]: trace histogram [56, 56, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:17:49,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-18 00:17:49,874 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,SelfDestructingSolverStorable58 [2022-03-18 00:17:49,875 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:17:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:17:49,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1479898783, now seen corresponding path program 113 times [2022-03-18 00:17:49,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:49,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2010530813] [2022-03-18 00:17:49,876 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:17:49,876 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:17:49,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1479898783, now seen corresponding path program 114 times [2022-03-18 00:17:49,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:17:49,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994691485] [2022-03-18 00:17:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:17:49,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:17:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:50,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:17:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3143 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:50,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:17:50,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994691485] [2022-03-18 00:17:50,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994691485] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:17:50,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639166112] [2022-03-18 00:17:50,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:17:50,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:17:50,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:17:50,965 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:17:50,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-18 00:17:51,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:17:51,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:17:51,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:17:51,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:17:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3143 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2022-03-18 00:17:51,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:17:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3143 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2022-03-18 00:17:51,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639166112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:17:51,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:17:51,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 7, 7] total 66 [2022-03-18 00:17:51,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:17:51,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2010530813] [2022-03-18 00:17:51,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2010530813] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:17:51,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:17:51,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-18 00:17:51,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384176305] [2022-03-18 00:17:51,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:17:51,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-18 00:17:51,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:51,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-18 00:17:51,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1959, Invalid=2331, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 00:17:51,768 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:56,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:17:56,365 INFO L93 Difference]: Finished difference Result 371 states and 428 transitions. [2022-03-18 00:17:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-18 00:17:56,366 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2022-03-18 00:17:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:17:56,367 INFO L225 Difference]: With dead ends: 371 [2022-03-18 00:17:56,367 INFO L226 Difference]: Without dead ends: 357 [2022-03-18 00:17:56,368 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1997 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5551, Invalid=9455, Unknown=0, NotChecked=0, Total=15006 [2022-03-18 00:17:56,368 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 890 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:17:56,368 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 36 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:17:56,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-03-18 00:17:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 135. [2022-03-18 00:17:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-03-18 00:17:56,457 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2022-03-18 00:17:56,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:17:56,457 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-03-18 00:17:56,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:17:56,457 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-03-18 00:17:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-18 00:17:56,457 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:17:56,457 INFO L500 BasicCegarLoop]: trace histogram [57, 57, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:17:56,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-18 00:17:56,658 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,SelfDestructingSolverStorable59 [2022-03-18 00:17:56,658 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:17:56,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:17:56,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1213789759, now seen corresponding path program 115 times [2022-03-18 00:17:56,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:56,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1876868129] [2022-03-18 00:17:56,660 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:17:56,660 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:17:56,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1213789759, now seen corresponding path program 116 times [2022-03-18 00:17:56,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:17:56,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159855387] [2022-03-18 00:17:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:17:56,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:17:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:57,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:17:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:57,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:17:57,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159855387] [2022-03-18 00:17:57,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159855387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:17:57,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876270788] [2022-03-18 00:17:57,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:17:57,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:17:57,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:17:57,773 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:17:57,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-18 00:17:58,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:17:58,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:17:58,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 00:17:58,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:17:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:17:58,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:18:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:18:01,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876270788] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:18:01,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:18:01,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-03-18 00:18:01,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:18:01,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1876868129] [2022-03-18 00:18:01,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1876868129] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:18:01,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:18:01,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-18 00:18:01,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463691689] [2022-03-18 00:18:01,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:18:01,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-18 00:18:01,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:18:01,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-18 00:18:01,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-03-18 00:18:01,529 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:18:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:18:06,589 INFO L93 Difference]: Finished difference Result 377 states and 435 transitions. [2022-03-18 00:18:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-18 00:18:06,590 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-03-18 00:18:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:18:06,591 INFO L225 Difference]: With dead ends: 377 [2022-03-18 00:18:06,591 INFO L226 Difference]: Without dead ends: 363 [2022-03-18 00:18:06,592 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13926, Invalid=17580, Unknown=0, NotChecked=0, Total=31506 [2022-03-18 00:18:06,592 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 832 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:18:06,592 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 46 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:18:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-03-18 00:18:06,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 137. [2022-03-18 00:18:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 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) [2022-03-18 00:18:06,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2022-03-18 00:18:06,671 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2022-03-18 00:18:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:18:06,671 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2022-03-18 00:18:06,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:18:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2022-03-18 00:18:06,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-18 00:18:06,672 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:18:06,672 INFO L500 BasicCegarLoop]: trace histogram [58, 58, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:18:06,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-18 00:18:06,872 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:18:06,872 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:18:06,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:18:06,873 INFO L85 PathProgramCache]: Analyzing trace with hash 16800867, now seen corresponding path program 117 times [2022-03-18 00:18:06,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:18:06,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [20851773] [2022-03-18 00:18:06,874 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:18:06,874 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:18:06,874 INFO L85 PathProgramCache]: Analyzing trace with hash 16800867, now seen corresponding path program 118 times [2022-03-18 00:18:06,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:18:06,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986043353] [2022-03-18 00:18:06,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:18:06,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:18:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:18:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:18:08,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:18:08,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986043353] [2022-03-18 00:18:08,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986043353] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:18:08,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463992578] [2022-03-18 00:18:08,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:18:08,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:18:08,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:18:08,066 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:18:08,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-18 00:18:08,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:18:08,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:18:08,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-18 00:18:08,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:18:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:18:08,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:18:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:18:11,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463992578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:18:11,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:18:11,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-03-18 00:18:11,997 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:18:11,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [20851773] [2022-03-18 00:18:11,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [20851773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:18:11,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:18:11,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-18 00:18:11,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730520506] [2022-03-18 00:18:11,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:18:11,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-18 00:18:11,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:18:11,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-18 00:18:11,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-03-18 00:18:11,999 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:18:17,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:18:17,055 INFO L93 Difference]: Finished difference Result 383 states and 442 transitions. [2022-03-18 00:18:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-18 00:18:17,056 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-03-18 00:18:17,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:18:17,057 INFO L225 Difference]: With dead ends: 383 [2022-03-18 00:18:17,057 INFO L226 Difference]: Without dead ends: 369 [2022-03-18 00:18:17,058 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14402, Invalid=18178, Unknown=0, NotChecked=0, Total=32580 [2022-03-18 00:18:17,058 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 883 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:18:17,058 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 41 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:18:17,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-03-18 00:18:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 139. [2022-03-18 00:18:17,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 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) [2022-03-18 00:18:17,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2022-03-18 00:18:17,139 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2022-03-18 00:18:17,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:18:17,140 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2022-03-18 00:18:17,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:18:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2022-03-18 00:18:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-18 00:18:17,140 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:18:17,140 INFO L500 BasicCegarLoop]: trace histogram [59, 59, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:18:17,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-18 00:18:17,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:18:17,341 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:18:17,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:18:17,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1498386053, now seen corresponding path program 119 times [2022-03-18 00:18:17,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:18:17,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1420095298] [2022-03-18 00:18:17,342 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:18:17,342 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:18:17,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1498386053, now seen corresponding path program 120 times [2022-03-18 00:18:17,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:18:17,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953824725] [2022-03-18 00:18:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:18:17,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:18:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:18,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:18:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:18:18,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:18:18,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953824725] [2022-03-18 00:18:18,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953824725] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:18:18,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960114481] [2022-03-18 00:18:18,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:18:18,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:18:18,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:18:18,531 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:18:18,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-18 00:18:18,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:18:18,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:18:18,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:18:18,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:18:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2022-03-18 00:18:19,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:18:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2022-03-18 00:18:19,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960114481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:18:19,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:18:19,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 7, 7] total 69 [2022-03-18 00:18:19,311 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:18:19,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1420095298] [2022-03-18 00:18:19,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1420095298] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:18:19,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:18:19,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-18 00:18:19,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542417060] [2022-03-18 00:18:19,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:18:19,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-18 00:18:19,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:18:19,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-18 00:18:19,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2151, Invalid=2541, Unknown=0, NotChecked=0, Total=4692 [2022-03-18 00:18:19,313 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:18:24,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:18:24,555 INFO L93 Difference]: Finished difference Result 389 states and 449 transitions. [2022-03-18 00:18:24,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-18 00:18:24,555 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-03-18 00:18:24,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:18:24,556 INFO L225 Difference]: With dead ends: 389 [2022-03-18 00:18:24,556 INFO L226 Difference]: Without dead ends: 375 [2022-03-18 00:18:24,557 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6112, Invalid=10400, Unknown=0, NotChecked=0, Total=16512 [2022-03-18 00:18:24,557 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1145 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:18:24,557 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1145 Valid, 31 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:18:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-03-18 00:18:24,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 141. [2022-03-18 00:18:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:18:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2022-03-18 00:18:24,640 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2022-03-18 00:18:24,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:18:24,640 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2022-03-18 00:18:24,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:18:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2022-03-18 00:18:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-18 00:18:24,641 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:18:24,641 INFO L500 BasicCegarLoop]: trace histogram [60, 60, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:18:24,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-18 00:18:24,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:18:24,843 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:18:24,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:18:24,843 INFO L85 PathProgramCache]: Analyzing trace with hash -627392473, now seen corresponding path program 121 times [2022-03-18 00:18:24,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:18:24,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1946619347] [2022-03-18 00:18:24,844 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:18:24,844 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:18:24,844 INFO L85 PathProgramCache]: Analyzing trace with hash -627392473, now seen corresponding path program 122 times [2022-03-18 00:18:24,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:18:24,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073854150] [2022-03-18 00:18:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:18:24,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:18:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:26,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:18:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3607 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:18:26,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:18:26,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073854150] [2022-03-18 00:18:26,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073854150] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:18:26,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948642267] [2022-03-18 00:18:26,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:18:26,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:18:26,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:18:26,073 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:18:26,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-18 00:18:26,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:18:26,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:18:26,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-18 00:18:26,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:18:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3607 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:18:26,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:18:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3607 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:18:30,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948642267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:18:30,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:18:30,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-03-18 00:18:30,176 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:18:30,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1946619347] [2022-03-18 00:18:30,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1946619347] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:18:30,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:18:30,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-18 00:18:30,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098476243] [2022-03-18 00:18:30,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:18:30,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-18 00:18:30,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:18:30,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-18 00:18:30,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-03-18 00:18:30,180 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:18:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:18:35,725 INFO L93 Difference]: Finished difference Result 395 states and 456 transitions. [2022-03-18 00:18:35,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-18 00:18:35,726 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-03-18 00:18:35,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:18:35,727 INFO L225 Difference]: With dead ends: 395 [2022-03-18 00:18:35,727 INFO L226 Difference]: Without dead ends: 381 [2022-03-18 00:18:35,728 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15378, Invalid=19404, Unknown=0, NotChecked=0, Total=34782 [2022-03-18 00:18:35,728 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 833 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:18:35,728 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [833 Valid, 46 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:18:35,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-03-18 00:18:35,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 143. [2022-03-18 00:18:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:18:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2022-03-18 00:18:35,816 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2022-03-18 00:18:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:18:35,816 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2022-03-18 00:18:35,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:18:35,817 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2022-03-18 00:18:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-18 00:18:35,817 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:18:35,817 INFO L500 BasicCegarLoop]: trace histogram [61, 61, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:18:35,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-18 00:18:36,018 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:18:36,018 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:18:36,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:18:36,018 INFO L85 PathProgramCache]: Analyzing trace with hash 903876937, now seen corresponding path program 123 times [2022-03-18 00:18:36,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:18:36,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [41762363] [2022-03-18 00:18:36,020 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:18:36,020 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:18:36,020 INFO L85 PathProgramCache]: Analyzing trace with hash 903876937, now seen corresponding path program 124 times [2022-03-18 00:18:36,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:18:36,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851610971] [2022-03-18 00:18:36,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:18:36,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:18:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:37,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:18:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3728 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:18:37,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:18:37,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851610971] [2022-03-18 00:18:37,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851610971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:18:37,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284268082] [2022-03-18 00:18:37,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:18:37,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:18:37,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:18:37,277 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:18:37,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-18 00:18:37,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:18:37,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:18:37,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 00:18:37,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:18:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3728 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:18:37,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:18:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3728 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:18:41,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284268082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:18:41,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:18:41,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-03-18 00:18:41,646 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:18:41,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [41762363] [2022-03-18 00:18:41,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [41762363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:18:41,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:18:41,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-18 00:18:41,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766864078] [2022-03-18 00:18:41,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:18:41,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-18 00:18:41,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:18:41,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-18 00:18:41,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-03-18 00:18:41,649 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:18:47,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:18:47,867 INFO L93 Difference]: Finished difference Result 401 states and 463 transitions. [2022-03-18 00:18:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-18 00:18:47,867 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-03-18 00:18:47,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:18:47,869 INFO L225 Difference]: With dead ends: 401 [2022-03-18 00:18:47,869 INFO L226 Difference]: Without dead ends: 387 [2022-03-18 00:18:47,870 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15878, Invalid=20032, Unknown=0, NotChecked=0, Total=35910 [2022-03-18 00:18:47,870 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1043 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:18:47,870 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1043 Valid, 31 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:18:47,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-03-18 00:18:47,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 145. [2022-03-18 00:18:47,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:18:47,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-03-18 00:18:47,969 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2022-03-18 00:18:47,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:18:47,969 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-03-18 00:18:47,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:18:47,969 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-03-18 00:18:47,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-18 00:18:47,970 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:18:47,970 INFO L500 BasicCegarLoop]: trace histogram [62, 62, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:18:47,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-18 00:18:48,170 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,SelfDestructingSolverStorable64 [2022-03-18 00:18:48,171 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:18:48,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:18:48,171 INFO L85 PathProgramCache]: Analyzing trace with hash -720002581, now seen corresponding path program 125 times [2022-03-18 00:18:48,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:18:48,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1843225647] [2022-03-18 00:18:48,172 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:18:48,172 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:18:48,172 INFO L85 PathProgramCache]: Analyzing trace with hash -720002581, now seen corresponding path program 126 times [2022-03-18 00:18:48,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:18:48,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986732383] [2022-03-18 00:18:48,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:18:48,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:18:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:49,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:18:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3851 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:18:49,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:18:49,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986732383] [2022-03-18 00:18:49,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986732383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:18:49,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189396795] [2022-03-18 00:18:49,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:18:49,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:18:49,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:18:49,511 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:18:49,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-18 00:18:49,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:18:49,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:18:49,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:18:49,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:18:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3851 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-03-18 00:18:50,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:18:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3851 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-03-18 00:18:50,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189396795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:18:50,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:18:50,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 7, 7] total 72 [2022-03-18 00:18:50,353 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:18:50,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1843225647] [2022-03-18 00:18:50,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1843225647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:18:50,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:18:50,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-18 00:18:50,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617433222] [2022-03-18 00:18:50,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:18:50,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-18 00:18:50,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:18:50,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-18 00:18:50,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2352, Invalid=2760, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 00:18:50,354 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:18:56,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:18:56,669 INFO L93 Difference]: Finished difference Result 407 states and 470 transitions. [2022-03-18 00:18:56,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-18 00:18:56,670 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-03-18 00:18:56,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:18:56,671 INFO L225 Difference]: With dead ends: 407 [2022-03-18 00:18:56,671 INFO L226 Difference]: Without dead ends: 393 [2022-03-18 00:18:56,672 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6700, Invalid=11390, Unknown=0, NotChecked=0, Total=18090 [2022-03-18 00:18:56,672 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 975 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:18:56,672 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 36 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:18:56,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-03-18 00:18:56,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 147. [2022-03-18 00:18:56,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 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) [2022-03-18 00:18:56,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2022-03-18 00:18:56,788 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2022-03-18 00:18:56,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:18:56,789 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2022-03-18 00:18:56,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:18:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2022-03-18 00:18:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-18 00:18:56,789 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:18:56,790 INFO L500 BasicCegarLoop]: trace histogram [63, 63, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:18:56,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-18 00:18:57,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:18:57,016 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:18:57,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:18:57,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2099876365, now seen corresponding path program 127 times [2022-03-18 00:18:57,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:18:57,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [492083493] [2022-03-18 00:18:57,017 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:18:57,017 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:18:57,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2099876365, now seen corresponding path program 128 times [2022-03-18 00:18:57,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:18:57,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532952032] [2022-03-18 00:18:57,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:18:57,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:18:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:58,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:18:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3976 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:18:58,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:18:58,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532952032] [2022-03-18 00:18:58,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532952032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:18:58,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316193861] [2022-03-18 00:18:58,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:18:58,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:18:58,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:18:58,392 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:18:58,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-18 00:18:58,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:18:58,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:18:58,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-18 00:18:58,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:18:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3976 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:18:59,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:19:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3976 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:19:02,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316193861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:19:02,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:19:02,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-03-18 00:19:02,901 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:19:02,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [492083493] [2022-03-18 00:19:02,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [492083493] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:19:02,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:19:02,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-18 00:19:02,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457673896] [2022-03-18 00:19:02,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:19:02,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-18 00:19:02,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:19:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-18 00:19:02,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-03-18 00:19:02,903 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:19:09,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:19:09,423 INFO L93 Difference]: Finished difference Result 413 states and 477 transitions. [2022-03-18 00:19:09,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-18 00:19:09,424 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-03-18 00:19:09,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:19:09,425 INFO L225 Difference]: With dead ends: 413 [2022-03-18 00:19:09,425 INFO L226 Difference]: Without dead ends: 399 [2022-03-18 00:19:09,426 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=16902, Invalid=21318, Unknown=0, NotChecked=0, Total=38220 [2022-03-18 00:19:09,426 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 975 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:19:09,427 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 46 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:19:09,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-03-18 00:19:09,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 149. [2022-03-18 00:19:09,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 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) [2022-03-18 00:19:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-03-18 00:19:09,524 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2022-03-18 00:19:09,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:19:09,524 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-03-18 00:19:09,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:19:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-03-18 00:19:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-03-18 00:19:09,525 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:19:09,525 INFO L500 BasicCegarLoop]: trace histogram [64, 64, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:19:09,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-18 00:19:09,734 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,SelfDestructingSolverStorable66 [2022-03-18 00:19:09,734 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:19:09,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:19:09,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1879179695, now seen corresponding path program 129 times [2022-03-18 00:19:09,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:19:09,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [522317890] [2022-03-18 00:19:09,735 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:19:09,735 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:19:09,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1879179695, now seen corresponding path program 130 times [2022-03-18 00:19:09,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:19:09,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413294456] [2022-03-18 00:19:09,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:19:09,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:19:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:11,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:19:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4103 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:19:11,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:19:11,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413294456] [2022-03-18 00:19:11,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413294456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:19:11,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034990960] [2022-03-18 00:19:11,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:19:11,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:19:11,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:19:11,144 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:19:11,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-18 00:19:11,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:19:11,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:19:11,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-18 00:19:11,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:19:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4103 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:19:11,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:19:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4103 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:19:15,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034990960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:19:15,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:19:15,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-18 00:19:15,869 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:19:15,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [522317890] [2022-03-18 00:19:15,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [522317890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:19:15,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:19:15,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-18 00:19:15,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328309547] [2022-03-18 00:19:15,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:19:15,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-18 00:19:15,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:19:15,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-18 00:19:15,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-03-18 00:19:15,872 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:19:22,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:19:22,729 INFO L93 Difference]: Finished difference Result 419 states and 484 transitions. [2022-03-18 00:19:22,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-18 00:19:22,729 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2022-03-18 00:19:22,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:19:22,730 INFO L225 Difference]: With dead ends: 419 [2022-03-18 00:19:22,730 INFO L226 Difference]: Without dead ends: 405 [2022-03-18 00:19:22,732 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=17426, Invalid=21976, Unknown=0, NotChecked=0, Total=39402 [2022-03-18 00:19:22,732 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 947 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:19:22,732 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [947 Valid, 36 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:19:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-03-18 00:19:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 151. [2022-03-18 00:19:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:19:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2022-03-18 00:19:22,836 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2022-03-18 00:19:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:19:22,836 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2022-03-18 00:19:22,836 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:19:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2022-03-18 00:19:22,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-03-18 00:19:22,837 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:19:22,837 INFO L500 BasicCegarLoop]: trace histogram [65, 65, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:19:22,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-18 00:19:23,063 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,SelfDestructingSolverStorable67 [2022-03-18 00:19:23,064 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:19:23,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:19:23,064 INFO L85 PathProgramCache]: Analyzing trace with hash 243077329, now seen corresponding path program 131 times [2022-03-18 00:19:23,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:19:23,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [429512767] [2022-03-18 00:19:23,065 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:19:23,065 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:19:23,065 INFO L85 PathProgramCache]: Analyzing trace with hash 243077329, now seen corresponding path program 132 times [2022-03-18 00:19:23,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:19:23,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885343034] [2022-03-18 00:19:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:19:23,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:19:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:24,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:19:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:19:24,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:19:24,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885343034] [2022-03-18 00:19:24,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885343034] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:19:24,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501059104] [2022-03-18 00:19:24,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:19:24,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:19:24,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:19:24,525 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:19:24,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-18 00:19:24,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:19:24,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:19:24,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:19:24,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:19:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4225 trivial. 0 not checked. [2022-03-18 00:19:25,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:19:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4225 trivial. 0 not checked. [2022-03-18 00:19:25,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501059104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:19:25,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:19:25,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 7, 7] total 75 [2022-03-18 00:19:25,460 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:19:25,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [429512767] [2022-03-18 00:19:25,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [429512767] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:19:25,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:19:25,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-18 00:19:25,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247359147] [2022-03-18 00:19:25,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:19:25,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-18 00:19:25,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:19:25,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-18 00:19:25,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2562, Invalid=2988, Unknown=0, NotChecked=0, Total=5550 [2022-03-18 00:19:25,462 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:19:32,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:19:32,426 INFO L93 Difference]: Finished difference Result 425 states and 491 transitions. [2022-03-18 00:19:32,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 00:19:32,426 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-03-18 00:19:32,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:19:32,427 INFO L225 Difference]: With dead ends: 425 [2022-03-18 00:19:32,427 INFO L226 Difference]: Without dead ends: 411 [2022-03-18 00:19:32,428 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2609 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7315, Invalid=12425, Unknown=0, NotChecked=0, Total=19740 [2022-03-18 00:19:32,428 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1065 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:19:32,428 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1065 Valid, 36 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:19:32,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-03-18 00:19:32,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 153. [2022-03-18 00:19:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:19:32,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2022-03-18 00:19:32,549 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2022-03-18 00:19:32,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:19:32,549 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2022-03-18 00:19:32,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:19:32,549 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2022-03-18 00:19:32,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-03-18 00:19:32,550 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:19:32,550 INFO L500 BasicCegarLoop]: trace histogram [66, 66, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:19:32,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-18 00:19:32,775 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,SelfDestructingSolverStorable68 [2022-03-18 00:19:32,775 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:19:32,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:19:32,776 INFO L85 PathProgramCache]: Analyzing trace with hash -93266061, now seen corresponding path program 133 times [2022-03-18 00:19:32,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:19:32,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [66814507] [2022-03-18 00:19:32,777 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:19:32,777 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:19:32,777 INFO L85 PathProgramCache]: Analyzing trace with hash -93266061, now seen corresponding path program 134 times [2022-03-18 00:19:32,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:19:32,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968495666] [2022-03-18 00:19:32,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:19:32,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:19:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:34,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:19:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4363 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:19:34,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:19:34,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968495666] [2022-03-18 00:19:34,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968495666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:19:34,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980533091] [2022-03-18 00:19:34,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:19:34,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:19:34,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:19:34,272 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:19:34,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-18 00:19:34,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:19:34,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:19:34,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-18 00:19:34,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:19:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4363 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:19:34,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:19:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4363 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:19:39,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980533091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:19:39,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:19:39,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-03-18 00:19:39,213 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:19:39,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [66814507] [2022-03-18 00:19:39,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [66814507] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:19:39,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:19:39,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-18 00:19:39,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992861365] [2022-03-18 00:19:39,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:19:39,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-18 00:19:39,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:19:39,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-18 00:19:39,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-03-18 00:19:39,216 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:19:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:19:46,693 INFO L93 Difference]: Finished difference Result 431 states and 498 transitions. [2022-03-18 00:19:46,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-18 00:19:46,693 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-03-18 00:19:46,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:19:46,694 INFO L225 Difference]: With dead ends: 431 [2022-03-18 00:19:46,695 INFO L226 Difference]: Without dead ends: 417 [2022-03-18 00:19:46,696 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=18498, Invalid=23322, Unknown=0, NotChecked=0, Total=41820 [2022-03-18 00:19:46,696 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1195 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:19:46,696 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1195 Valid, 31 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:19:46,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-03-18 00:19:46,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 155. [2022-03-18 00:19:46,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:19:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2022-03-18 00:19:46,806 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2022-03-18 00:19:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:19:46,806 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2022-03-18 00:19:46,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:19:46,806 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2022-03-18 00:19:46,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-18 00:19:46,807 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:19:46,807 INFO L500 BasicCegarLoop]: trace histogram [67, 67, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:19:46,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-18 00:19:47,007 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,SelfDestructingSolverStorable69 [2022-03-18 00:19:47,008 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:19:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:19:47,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1196716651, now seen corresponding path program 135 times [2022-03-18 00:19:47,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:19:47,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1614464006] [2022-03-18 00:19:47,009 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:19:47,009 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:19:47,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1196716651, now seen corresponding path program 136 times [2022-03-18 00:19:47,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:19:47,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576164875] [2022-03-18 00:19:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:19:47,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:19:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:48,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:19:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4496 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:19:48,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:19:48,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576164875] [2022-03-18 00:19:48,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576164875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:19:48,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064200054] [2022-03-18 00:19:48,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:19:48,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:19:48,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:19:48,540 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:19:48,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-18 00:19:49,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:19:49,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:19:49,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 00:19:49,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:19:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4496 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:19:49,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:19:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4496 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:19:53,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064200054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:19:53,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:19:53,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-18 00:19:53,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:19:53,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1614464006] [2022-03-18 00:19:53,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1614464006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:19:53,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:19:53,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-18 00:19:53,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760178653] [2022-03-18 00:19:53,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:19:53,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-18 00:19:53,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:19:53,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-18 00:19:53,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-18 00:19:53,602 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:20:01,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:20:01,445 INFO L93 Difference]: Finished difference Result 437 states and 505 transitions. [2022-03-18 00:20:01,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-18 00:20:01,446 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-03-18 00:20:01,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:20:01,447 INFO L225 Difference]: With dead ends: 437 [2022-03-18 00:20:01,447 INFO L226 Difference]: Without dead ends: 423 [2022-03-18 00:20:01,449 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=19046, Invalid=24010, Unknown=0, NotChecked=0, Total=43056 [2022-03-18 00:20:01,449 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1214 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:20:01,449 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1214 Valid, 36 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:20:01,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-03-18 00:20:01,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 157. [2022-03-18 00:20:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 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) [2022-03-18 00:20:01,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-03-18 00:20:01,559 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2022-03-18 00:20:01,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:20:01,559 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-03-18 00:20:01,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:20:01,559 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-03-18 00:20:01,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-18 00:20:01,559 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:20:01,560 INFO L500 BasicCegarLoop]: trace histogram [68, 68, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:20:01,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-18 00:20:01,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:20:01,760 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:20:01,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:20:01,761 INFO L85 PathProgramCache]: Analyzing trace with hash -755811529, now seen corresponding path program 137 times [2022-03-18 00:20:01,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:20:01,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1458130449] [2022-03-18 00:20:01,762 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:20:01,762 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:20:01,763 INFO L85 PathProgramCache]: Analyzing trace with hash -755811529, now seen corresponding path program 138 times [2022-03-18 00:20:01,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:20:01,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363990673] [2022-03-18 00:20:01,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:20:01,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:20:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:20:03,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:20:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:20:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4631 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:20:03,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:20:03,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363990673] [2022-03-18 00:20:03,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363990673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:20:03,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894933201] [2022-03-18 00:20:03,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:20:03,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:20:03,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:20:03,335 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:20:03,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-18 00:20:03,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:20:03,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:20:03,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:20:03,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:20:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4631 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2022-03-18 00:20:03,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:20:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4631 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2022-03-18 00:20:04,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894933201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:20:04,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:20:04,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 7, 7] total 78 [2022-03-18 00:20:04,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:20:04,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1458130449] [2022-03-18 00:20:04,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1458130449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:20:04,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:20:04,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-18 00:20:04,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099930929] [2022-03-18 00:20:04,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:20:04,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-18 00:20:04,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:20:04,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-18 00:20:04,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2781, Invalid=3225, Unknown=0, NotChecked=0, Total=6006 [2022-03-18 00:20:04,290 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:20:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:20:12,291 INFO L93 Difference]: Finished difference Result 443 states and 512 transitions. [2022-03-18 00:20:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-18 00:20:12,292 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2022-03-18 00:20:12,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:20:12,293 INFO L225 Difference]: With dead ends: 443 [2022-03-18 00:20:12,293 INFO L226 Difference]: Without dead ends: 429 [2022-03-18 00:20:12,294 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7957, Invalid=13505, Unknown=0, NotChecked=0, Total=21462 [2022-03-18 00:20:12,294 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1219 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:20:12,294 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1219 Valid, 46 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:20:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-03-18 00:20:12,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 159. [2022-03-18 00:20:12,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:20:12,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-03-18 00:20:12,419 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2022-03-18 00:20:12,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:20:12,419 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-03-18 00:20:12,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:20:12,419 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-03-18 00:20:12,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-18 00:20:12,420 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:20:12,420 INFO L500 BasicCegarLoop]: trace histogram [69, 69, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:20:12,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-18 00:20:12,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:20:12,621 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:20:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:20:12,621 INFO L85 PathProgramCache]: Analyzing trace with hash 2047215705, now seen corresponding path program 139 times [2022-03-18 00:20:12,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:20:12,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [611304524] [2022-03-18 00:20:12,622 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:20:12,622 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:20:12,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2047215705, now seen corresponding path program 140 times [2022-03-18 00:20:12,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:20:12,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088883406] [2022-03-18 00:20:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:20:12,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:20:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:20:14,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:20:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:20:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4768 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:20:14,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:20:14,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088883406] [2022-03-18 00:20:14,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088883406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:20:14,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685504940] [2022-03-18 00:20:14,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:20:14,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:20:14,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:20:14,209 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:20:14,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-18 00:20:14,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:20:14,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:20:14,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 00:20:14,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:20:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4768 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:20:14,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:20:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4768 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:20:19,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685504940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:20:19,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:20:19,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-03-18 00:20:19,606 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:20:19,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [611304524] [2022-03-18 00:20:19,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [611304524] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:20:19,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:20:19,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-18 00:20:19,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137349641] [2022-03-18 00:20:19,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:20:19,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-18 00:20:19,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:20:19,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-18 00:20:19,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-03-18 00:20:19,608 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:20:28,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:20:28,035 INFO L93 Difference]: Finished difference Result 449 states and 519 transitions. [2022-03-18 00:20:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-18 00:20:28,035 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-03-18 00:20:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:20:28,037 INFO L225 Difference]: With dead ends: 449 [2022-03-18 00:20:28,037 INFO L226 Difference]: Without dead ends: 435 [2022-03-18 00:20:28,039 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=20166, Invalid=25416, Unknown=0, NotChecked=0, Total=45582 [2022-03-18 00:20:28,039 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1119 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:20:28,040 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 46 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:20:28,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-03-18 00:20:28,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 161. [2022-03-18 00:20:28,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 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) [2022-03-18 00:20:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2022-03-18 00:20:28,172 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2022-03-18 00:20:28,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:20:28,173 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2022-03-18 00:20:28,173 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:20:28,173 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2022-03-18 00:20:28,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-18 00:20:28,174 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:20:28,174 INFO L500 BasicCegarLoop]: trace histogram [70, 70, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:20:28,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-18 00:20:28,380 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:20:28,381 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:20:28,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:20:28,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1483074309, now seen corresponding path program 141 times [2022-03-18 00:20:28,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:20:28,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1772163573] [2022-03-18 00:20:28,382 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:20:28,382 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:20:28,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1483074309, now seen corresponding path program 142 times [2022-03-18 00:20:28,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:20:28,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431930555] [2022-03-18 00:20:28,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:20:28,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:20:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:20:30,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:20:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:20:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4907 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:20:30,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:20:30,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431930555] [2022-03-18 00:20:30,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431930555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:20:30,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205213569] [2022-03-18 00:20:30,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:20:30,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:20:30,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:20:30,033 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:20:30,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-18 00:20:30,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:20:30,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:20:30,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-18 00:20:30,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:20:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4907 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:20:30,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:20:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4907 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:20:35,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205213569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:20:35,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:20:35,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-03-18 00:20:35,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:20:35,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1772163573] [2022-03-18 00:20:35,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1772163573] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:20:35,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:20:35,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-18 00:20:35,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11565781] [2022-03-18 00:20:35,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:20:35,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-18 00:20:35,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:20:35,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-18 00:20:35,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-03-18 00:20:35,524 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:20:44,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:20:44,438 INFO L93 Difference]: Finished difference Result 455 states and 526 transitions. [2022-03-18 00:20:44,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-18 00:20:44,438 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2022-03-18 00:20:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:20:44,440 INFO L225 Difference]: With dead ends: 455 [2022-03-18 00:20:44,440 INFO L226 Difference]: Without dead ends: 441 [2022-03-18 00:20:44,441 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=20738, Invalid=26134, Unknown=0, NotChecked=0, Total=46872 [2022-03-18 00:20:44,441 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1189 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:20:44,442 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1189 Valid, 41 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:20:44,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-03-18 00:20:44,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 163. [2022-03-18 00:20:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 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) [2022-03-18 00:20:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2022-03-18 00:20:44,573 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2022-03-18 00:20:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:20:44,573 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2022-03-18 00:20:44,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:20:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2022-03-18 00:20:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-03-18 00:20:44,574 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:20:44,574 INFO L500 BasicCegarLoop]: trace histogram [71, 71, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:20:44,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-18 00:20:44,782 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,SelfDestructingSolverStorable73 [2022-03-18 00:20:44,783 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:20:44,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:20:44,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1067613923, now seen corresponding path program 143 times [2022-03-18 00:20:44,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:20:44,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1048646159] [2022-03-18 00:20:44,784 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:20:44,784 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:20:44,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1067613923, now seen corresponding path program 144 times [2022-03-18 00:20:44,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:20:44,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045599938] [2022-03-18 00:20:44,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:20:44,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:20:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:20:46,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:20:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:20:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5048 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:20:46,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:20:46,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045599938] [2022-03-18 00:20:46,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045599938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:20:46,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367702701] [2022-03-18 00:20:46,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:20:46,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:20:46,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:20:46,488 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:20:46,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-18 00:20:46,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:20:46,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:20:46,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:20:46,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:20:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5048 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5041 trivial. 0 not checked. [2022-03-18 00:20:47,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:20:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5048 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5041 trivial. 0 not checked. [2022-03-18 00:20:47,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367702701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:20:47,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:20:47,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 7, 7] total 81 [2022-03-18 00:20:47,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:20:47,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1048646159] [2022-03-18 00:20:47,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1048646159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:20:47,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:20:47,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-18 00:20:47,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206053119] [2022-03-18 00:20:47,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:20:47,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-18 00:20:47,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:20:47,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-18 00:20:47,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3009, Invalid=3471, Unknown=0, NotChecked=0, Total=6480 [2022-03-18 00:20:47,522 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:20:56,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:20:56,446 INFO L93 Difference]: Finished difference Result 461 states and 533 transitions. [2022-03-18 00:20:56,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-18 00:20:56,446 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2022-03-18 00:20:56,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:20:56,448 INFO L225 Difference]: With dead ends: 461 [2022-03-18 00:20:56,448 INFO L226 Difference]: Without dead ends: 447 [2022-03-18 00:20:56,449 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3062 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8626, Invalid=14630, Unknown=0, NotChecked=0, Total=23256 [2022-03-18 00:20:56,449 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1222 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:20:56,449 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1222 Valid, 31 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:20:56,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-03-18 00:20:56,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 165. [2022-03-18 00:20:56,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.0125) internal successors, (162), 160 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) [2022-03-18 00:20:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2022-03-18 00:20:56,573 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2022-03-18 00:20:56,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:20:56,573 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2022-03-18 00:20:56,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:20:56,573 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2022-03-18 00:20:56,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-03-18 00:20:56,574 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:20:56,574 INFO L500 BasicCegarLoop]: trace histogram [72, 72, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:20:56,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-18 00:20:56,774 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:20:56,774 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:20:56,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:20:56,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1242141505, now seen corresponding path program 145 times [2022-03-18 00:20:56,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:20:56,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1870130668] [2022-03-18 00:20:56,776 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:20:56,776 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:20:56,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1242141505, now seen corresponding path program 146 times [2022-03-18 00:20:56,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:20:56,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276322780] [2022-03-18 00:20:56,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:20:56,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:20:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:20:58,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:20:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:20:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5191 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:20:58,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:20:58,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276322780] [2022-03-18 00:20:58,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276322780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:20:58,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124739994] [2022-03-18 00:20:58,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:20:58,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:20:58,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:20:58,504 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:20:58,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-18 00:20:59,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:20:59,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:20:59,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-18 00:20:59,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:20:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5191 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:20:59,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:21:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5191 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:21:04,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124739994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:21:04,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:21:04,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-03-18 00:21:04,224 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:21:04,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1870130668] [2022-03-18 00:21:04,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1870130668] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:21:04,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:21:04,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-18 00:21:04,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645224142] [2022-03-18 00:21:04,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:21:04,225 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-18 00:21:04,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:21:04,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-18 00:21:04,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-03-18 00:21:04,228 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:21:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:21:13,740 INFO L93 Difference]: Finished difference Result 467 states and 540 transitions. [2022-03-18 00:21:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-18 00:21:13,741 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-03-18 00:21:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:21:13,742 INFO L225 Difference]: With dead ends: 467 [2022-03-18 00:21:13,742 INFO L226 Difference]: Without dead ends: 453 [2022-03-18 00:21:13,745 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=21906, Invalid=27600, Unknown=0, NotChecked=0, Total=49506 [2022-03-18 00:21:13,745 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1006 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:21:13,745 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 51 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:21:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-03-18 00:21:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 167. [2022-03-18 00:21:13,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 162 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:21:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2022-03-18 00:21:13,874 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2022-03-18 00:21:13,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:21:13,874 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2022-03-18 00:21:13,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:21:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2022-03-18 00:21:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-03-18 00:21:13,875 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:21:13,875 INFO L500 BasicCegarLoop]: trace histogram [73, 73, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:21:13,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-18 00:21:14,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:21:14,075 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:21:14,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:21:14,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1459423263, now seen corresponding path program 147 times [2022-03-18 00:21:14,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:21:14,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [814583441] [2022-03-18 00:21:14,077 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:21:14,077 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:21:14,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1459423263, now seen corresponding path program 148 times [2022-03-18 00:21:14,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:21:14,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309794687] [2022-03-18 00:21:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:21:14,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:21:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:15,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:21:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5336 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:21:15,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:21:15,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309794687] [2022-03-18 00:21:15,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309794687] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:21:15,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385348393] [2022-03-18 00:21:15,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:21:15,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:21:15,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:21:15,831 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:21:15,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-18 00:21:16,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:21:16,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:21:16,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-18 00:21:16,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:21:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5336 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:21:16,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:21:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5336 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:21:21,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385348393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:21:21,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:21:21,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-03-18 00:21:21,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:21:21,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [814583441] [2022-03-18 00:21:21,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [814583441] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:21:21,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:21:21,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-18 00:21:21,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592548986] [2022-03-18 00:21:21,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:21:21,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-18 00:21:21,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:21:21,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-18 00:21:21,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-03-18 00:21:21,750 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:21:31,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:21:31,601 INFO L93 Difference]: Finished difference Result 473 states and 547 transitions. [2022-03-18 00:21:31,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-18 00:21:31,601 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-03-18 00:21:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:21:31,602 INFO L225 Difference]: With dead ends: 473 [2022-03-18 00:21:31,602 INFO L226 Difference]: Without dead ends: 459 [2022-03-18 00:21:31,604 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=22502, Invalid=28348, Unknown=0, NotChecked=0, Total=50850 [2022-03-18 00:21:31,604 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1100 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:21:31,604 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1100 Valid, 46 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:21:31,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-03-18 00:21:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 169. [2022-03-18 00:21:31,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:21:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-03-18 00:21:31,737 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2022-03-18 00:21:31,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:21:31,737 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-03-18 00:21:31,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:21:31,737 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-03-18 00:21:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-18 00:21:31,738 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:21:31,738 INFO L500 BasicCegarLoop]: trace histogram [74, 74, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:21:31,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-18 00:21:31,938 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,SelfDestructingSolverStorable76 [2022-03-18 00:21:31,938 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:21:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:21:31,938 INFO L85 PathProgramCache]: Analyzing trace with hash 186204803, now seen corresponding path program 149 times [2022-03-18 00:21:31,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:21:31,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1800345400] [2022-03-18 00:21:31,940 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:21:31,940 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:21:31,940 INFO L85 PathProgramCache]: Analyzing trace with hash 186204803, now seen corresponding path program 150 times [2022-03-18 00:21:31,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:21:31,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794461577] [2022-03-18 00:21:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:21:31,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:21:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:33,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:21:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5483 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:21:33,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:21:33,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794461577] [2022-03-18 00:21:33,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794461577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:21:33,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535720397] [2022-03-18 00:21:33,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:21:33,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:21:33,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:21:33,739 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:21:33,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-18 00:21:34,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:21:34,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:21:34,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:21:34,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:21:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5483 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5476 trivial. 0 not checked. [2022-03-18 00:21:34,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:21:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5483 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5476 trivial. 0 not checked. [2022-03-18 00:21:34,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535720397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:21:34,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:21:34,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 7, 7] total 84 [2022-03-18 00:21:34,799 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:21:34,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1800345400] [2022-03-18 00:21:34,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1800345400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:21:34,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:21:34,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-18 00:21:34,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111463360] [2022-03-18 00:21:34,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:21:34,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-18 00:21:34,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:21:34,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-18 00:21:34,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3246, Invalid=3726, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 00:21:34,801 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:21:44,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:21:44,918 INFO L93 Difference]: Finished difference Result 479 states and 554 transitions. [2022-03-18 00:21:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-18 00:21:44,919 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2022-03-18 00:21:44,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:21:44,920 INFO L225 Difference]: With dead ends: 479 [2022-03-18 00:21:44,920 INFO L226 Difference]: Without dead ends: 465 [2022-03-18 00:21:44,921 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3302 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9322, Invalid=15800, Unknown=0, NotChecked=0, Total=25122 [2022-03-18 00:21:44,921 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1414 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:21:44,921 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1414 Valid, 46 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:21:44,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-03-18 00:21:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 171. [2022-03-18 00:21:45,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:21:45,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2022-03-18 00:21:45,056 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2022-03-18 00:21:45,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:21:45,057 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2022-03-18 00:21:45,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:21:45,057 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2022-03-18 00:21:45,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-03-18 00:21:45,058 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:21:45,058 INFO L500 BasicCegarLoop]: trace histogram [75, 75, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:21:45,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-18 00:21:45,260 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,SelfDestructingSolverStorable77 [2022-03-18 00:21:45,260 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:21:45,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:21:45,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1086811301, now seen corresponding path program 151 times [2022-03-18 00:21:45,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:21:45,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1790537554] [2022-03-18 00:21:45,261 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:21:45,261 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:21:45,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1086811301, now seen corresponding path program 152 times [2022-03-18 00:21:45,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:21:45,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543475988] [2022-03-18 00:21:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:21:45,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:21:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:47,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:21:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5632 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:21:47,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:21:47,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543475988] [2022-03-18 00:21:47,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543475988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:21:47,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17414258] [2022-03-18 00:21:47,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:21:47,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:21:47,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:21:47,097 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:21:47,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-18 00:21:47,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:21:47,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:21:47,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-18 00:21:47,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:21:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5632 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:21:47,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:21:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5632 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:21:53,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17414258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:21:53,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:21:53,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-03-18 00:21:53,241 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:21:53,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1790537554] [2022-03-18 00:21:53,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1790537554] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:21:53,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:21:53,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-18 00:21:53,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480115008] [2022-03-18 00:21:53,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:21:53,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-18 00:21:53,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:21:53,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-18 00:21:53,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-03-18 00:21:53,246 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:22:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:22:03,918 INFO L93 Difference]: Finished difference Result 485 states and 561 transitions. [2022-03-18 00:22:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-18 00:22:03,918 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-03-18 00:22:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:22:03,919 INFO L225 Difference]: With dead ends: 485 [2022-03-18 00:22:03,919 INFO L226 Difference]: Without dead ends: 471 [2022-03-18 00:22:03,921 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=23718, Invalid=29874, Unknown=0, NotChecked=0, Total=53592 [2022-03-18 00:22:03,921 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1398 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1398 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:22:03,921 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1398 Valid, 21 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:22:03,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-03-18 00:22:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 173. [2022-03-18 00:22:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 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) [2022-03-18 00:22:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2022-03-18 00:22:04,109 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2022-03-18 00:22:04,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:22:04,109 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2022-03-18 00:22:04,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:22:04,109 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2022-03-18 00:22:04,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-03-18 00:22:04,110 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:22:04,110 INFO L500 BasicCegarLoop]: trace histogram [76, 76, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:22:04,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-18 00:22:04,332 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:22:04,332 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:22:04,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:22:04,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1013737913, now seen corresponding path program 153 times [2022-03-18 00:22:04,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:22:04,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1741798037] [2022-03-18 00:22:04,334 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:22:04,334 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:22:04,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1013737913, now seen corresponding path program 154 times [2022-03-18 00:22:04,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:22:04,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985530401] [2022-03-18 00:22:04,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:22:04,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:22:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:06,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:22:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5783 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:22:06,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:22:06,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985530401] [2022-03-18 00:22:06,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985530401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:22:06,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126504771] [2022-03-18 00:22:06,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:22:06,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:22:06,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:22:06,390 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:22:06,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-18 00:22:06,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:22:06,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:22:06,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 78 conjunts are in the unsatisfiable core [2022-03-18 00:22:06,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:22:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5783 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:22:07,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:22:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5783 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:22:12,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126504771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:22:12,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:22:12,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-03-18 00:22:12,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:22:12,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1741798037] [2022-03-18 00:22:12,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1741798037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:22:12,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:22:12,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-18 00:22:12,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642911569] [2022-03-18 00:22:12,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:22:12,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-18 00:22:12,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:22:12,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-18 00:22:12,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-03-18 00:22:12,784 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:22:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:22:23,911 INFO L93 Difference]: Finished difference Result 491 states and 568 transitions. [2022-03-18 00:22:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-18 00:22:23,911 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-03-18 00:22:23,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:22:23,913 INFO L225 Difference]: With dead ends: 491 [2022-03-18 00:22:23,913 INFO L226 Difference]: Without dead ends: 477 [2022-03-18 00:22:23,916 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=24338, Invalid=30652, Unknown=0, NotChecked=0, Total=54990 [2022-03-18 00:22:23,916 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1165 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:22:23,916 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 41 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:22:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-03-18 00:22:24,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 175. [2022-03-18 00:22:24,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 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) [2022-03-18 00:22:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2022-03-18 00:22:24,067 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2022-03-18 00:22:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:22:24,067 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2022-03-18 00:22:24,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:22:24,068 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2022-03-18 00:22:24,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-03-18 00:22:24,068 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:22:24,069 INFO L500 BasicCegarLoop]: trace histogram [77, 77, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:22:24,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-18 00:22:24,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:22:24,287 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:22:24,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:22:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1006903447, now seen corresponding path program 155 times [2022-03-18 00:22:24,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:22:24,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1214642022] [2022-03-18 00:22:24,289 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:22:24,289 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:22:24,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1006903447, now seen corresponding path program 156 times [2022-03-18 00:22:24,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:22:24,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943023455] [2022-03-18 00:22:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:22:24,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:22:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:26,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:22:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5936 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:22:26,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:22:26,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943023455] [2022-03-18 00:22:26,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943023455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:22:26,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865698743] [2022-03-18 00:22:26,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:22:26,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:22:26,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:22:26,234 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:22:26,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-18 00:22:26,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:22:26,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:22:26,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:22:26,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:22:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5936 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2022-03-18 00:22:26,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:22:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5936 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2022-03-18 00:22:27,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865698743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:22:27,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:22:27,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 7, 7] total 87 [2022-03-18 00:22:27,310 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:22:27,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1214642022] [2022-03-18 00:22:27,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1214642022] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:22:27,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:22:27,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-18 00:22:27,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845374870] [2022-03-18 00:22:27,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:22:27,310 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-18 00:22:27,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:22:27,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-18 00:22:27,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3492, Invalid=3990, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 00:22:27,312 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:22:38,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:22:38,611 INFO L93 Difference]: Finished difference Result 497 states and 575 transitions. [2022-03-18 00:22:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-18 00:22:38,612 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-03-18 00:22:38,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:22:38,613 INFO L225 Difference]: With dead ends: 497 [2022-03-18 00:22:38,613 INFO L226 Difference]: Without dead ends: 483 [2022-03-18 00:22:38,614 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 343 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10045, Invalid=17015, Unknown=0, NotChecked=0, Total=27060 [2022-03-18 00:22:38,614 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1071 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:22:38,614 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 61 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:22:38,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-03-18 00:22:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 177. [2022-03-18 00:22:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:22:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2022-03-18 00:22:38,770 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2022-03-18 00:22:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:22:38,771 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2022-03-18 00:22:38,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:22:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2022-03-18 00:22:38,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-18 00:22:38,771 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:22:38,771 INFO L500 BasicCegarLoop]: trace histogram [78, 78, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:22:38,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-18 00:22:38,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:22:38,972 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:22:38,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:22:38,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1266051083, now seen corresponding path program 157 times [2022-03-18 00:22:38,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:22:38,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1621686372] [2022-03-18 00:22:38,973 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:22:38,973 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:22:38,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1266051083, now seen corresponding path program 158 times [2022-03-18 00:22:38,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:22:38,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690478798] [2022-03-18 00:22:38,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:22:38,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:22:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:40,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:22:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6091 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:22:40,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:22:40,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690478798] [2022-03-18 00:22:40,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690478798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:22:40,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985598747] [2022-03-18 00:22:40,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:22:40,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:22:40,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:22:40,930 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:22:40,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-18 00:22:41,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:22:41,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:22:41,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-18 00:22:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:22:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6091 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:22:41,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:22:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6091 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:22:47,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985598747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:22:47,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:22:47,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-03-18 00:22:47,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:22:47,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1621686372] [2022-03-18 00:22:47,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1621686372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:22:47,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:22:47,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-18 00:22:47,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941488407] [2022-03-18 00:22:47,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:22:47,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-18 00:22:47,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:22:47,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-18 00:22:47,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-03-18 00:22:47,482 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:22:59,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:22:59,577 INFO L93 Difference]: Finished difference Result 503 states and 582 transitions. [2022-03-18 00:22:59,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-18 00:22:59,578 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2022-03-18 00:22:59,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:22:59,579 INFO L225 Difference]: With dead ends: 503 [2022-03-18 00:22:59,579 INFO L226 Difference]: Without dead ends: 489 [2022-03-18 00:22:59,581 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=25602, Invalid=32238, Unknown=0, NotChecked=0, Total=57840 [2022-03-18 00:22:59,581 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1230 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:22:59,581 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1230 Valid, 46 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:22:59,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-03-18 00:22:59,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 179. [2022-03-18 00:22:59,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:22:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2022-03-18 00:22:59,738 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2022-03-18 00:22:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:22:59,738 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2022-03-18 00:22:59,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:22:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2022-03-18 00:22:59,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-03-18 00:22:59,738 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:22:59,739 INFO L500 BasicCegarLoop]: trace histogram [79, 79, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:22:59,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-18 00:22:59,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:22:59,939 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:22:59,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:22:59,939 INFO L85 PathProgramCache]: Analyzing trace with hash -562999251, now seen corresponding path program 159 times [2022-03-18 00:22:59,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:22:59,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1517933719] [2022-03-18 00:22:59,940 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:22:59,940 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:22:59,941 INFO L85 PathProgramCache]: Analyzing trace with hash -562999251, now seen corresponding path program 160 times [2022-03-18 00:22:59,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:22:59,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078819730] [2022-03-18 00:22:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:22:59,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:22:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:23:01,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:23:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:23:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6248 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:23:01,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:23:01,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078819730] [2022-03-18 00:23:01,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078819730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:23:01,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249185021] [2022-03-18 00:23:01,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:23:01,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:23:01,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:23:01,950 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:23:01,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-18 00:23:02,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:23:02,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:23:02,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-18 00:23:02,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:23:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6248 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:23:02,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:23:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6248 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:23:08,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249185021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:23:08,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:23:08,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-03-18 00:23:08,718 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:23:08,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1517933719] [2022-03-18 00:23:08,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1517933719] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:23:08,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:23:08,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-18 00:23:08,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875632368] [2022-03-18 00:23:08,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:23:08,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-18 00:23:08,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:23:08,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-18 00:23:08,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-03-18 00:23:08,721 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:23:21,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:23:21,177 INFO L93 Difference]: Finished difference Result 509 states and 589 transitions. [2022-03-18 00:23:21,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-18 00:23:21,178 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2022-03-18 00:23:21,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:23:21,179 INFO L225 Difference]: With dead ends: 509 [2022-03-18 00:23:21,179 INFO L226 Difference]: Without dead ends: 495 [2022-03-18 00:23:21,181 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3633 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=26246, Invalid=33046, Unknown=0, NotChecked=0, Total=59292 [2022-03-18 00:23:21,181 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1273 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:23:21,181 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1273 Valid, 41 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:23:21,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-18 00:23:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 181. [2022-03-18 00:23:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:23:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2022-03-18 00:23:21,352 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2022-03-18 00:23:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:23:21,352 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2022-03-18 00:23:21,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:23:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2022-03-18 00:23:21,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-03-18 00:23:21,353 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:23:21,353 INFO L500 BasicCegarLoop]: trace histogram [80, 80, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:23:21,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-18 00:23:21,553 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:23:21,554 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:23:21,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:23:21,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1638746161, now seen corresponding path program 161 times [2022-03-18 00:23:21,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:23:21,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [827106934] [2022-03-18 00:23:21,555 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:23:21,555 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:23:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1638746161, now seen corresponding path program 162 times [2022-03-18 00:23:21,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:23:21,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422491567] [2022-03-18 00:23:21,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:23:21,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:23:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:23:23,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:23:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:23:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6407 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:23:23,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:23:23,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422491567] [2022-03-18 00:23:23,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422491567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:23:23,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119156161] [2022-03-18 00:23:23,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:23:23,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:23:23,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:23:23,612 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:23:23,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-18 00:23:24,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:23:24,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:23:24,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:23:24,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:23:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6407 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6400 trivial. 0 not checked. [2022-03-18 00:23:24,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:23:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6407 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6400 trivial. 0 not checked. [2022-03-18 00:23:24,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119156161] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:23:24,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:23:24,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 7, 7] total 90 [2022-03-18 00:23:24,749 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:23:24,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [827106934] [2022-03-18 00:23:24,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [827106934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:23:24,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:23:24,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-18 00:23:24,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342049385] [2022-03-18 00:23:24,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:23:24,750 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-18 00:23:24,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:23:24,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-18 00:23:24,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3747, Invalid=4263, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 00:23:24,752 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:23:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:23:37,384 INFO L93 Difference]: Finished difference Result 515 states and 596 transitions. [2022-03-18 00:23:37,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-18 00:23:37,385 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2022-03-18 00:23:37,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:23:37,386 INFO L225 Difference]: With dead ends: 515 [2022-03-18 00:23:37,386 INFO L226 Difference]: Without dead ends: 501 [2022-03-18 00:23:37,387 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 355 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3809 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=10795, Invalid=18275, Unknown=0, NotChecked=0, Total=29070 [2022-03-18 00:23:37,387 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1432 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:23:37,387 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 36 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:23:37,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-03-18 00:23:37,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 183. [2022-03-18 00:23:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 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) [2022-03-18 00:23:37,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2022-03-18 00:23:37,550 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2022-03-18 00:23:37,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:23:37,550 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2022-03-18 00:23:37,550 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:23:37,550 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2022-03-18 00:23:37,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-18 00:23:37,551 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:23:37,551 INFO L500 BasicCegarLoop]: trace histogram [81, 81, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:23:37,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-18 00:23:37,751 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,SelfDestructingSolverStorable83 [2022-03-18 00:23:37,751 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:23:37,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:23:37,752 INFO L85 PathProgramCache]: Analyzing trace with hash -344408335, now seen corresponding path program 163 times [2022-03-18 00:23:37,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:23:37,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1942240472] [2022-03-18 00:23:37,753 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:23:37,753 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:23:37,753 INFO L85 PathProgramCache]: Analyzing trace with hash -344408335, now seen corresponding path program 164 times [2022-03-18 00:23:37,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:23:37,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776410573] [2022-03-18 00:23:37,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:23:37,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:23:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:23:39,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:23:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:23:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6568 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:23:39,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:23:39,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776410573] [2022-03-18 00:23:39,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776410573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:23:39,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165462805] [2022-03-18 00:23:39,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:23:39,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:23:39,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:23:39,866 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:23:39,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-18 00:23:40,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:23:40,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:23:40,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-18 00:23:40,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:23:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6568 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:23:40,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:23:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6568 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:23:46,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165462805] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:23:46,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:23:46,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-03-18 00:23:46,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:23:46,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1942240472] [2022-03-18 00:23:46,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1942240472] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:23:46,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:23:46,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-18 00:23:46,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563252351] [2022-03-18 00:23:46,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:23:46,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-18 00:23:46,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:23:46,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-18 00:23:46,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-03-18 00:23:46,882 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:24:00,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:24:00,410 INFO L93 Difference]: Finished difference Result 521 states and 603 transitions. [2022-03-18 00:24:00,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-18 00:24:00,411 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-03-18 00:24:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:24:00,412 INFO L225 Difference]: With dead ends: 521 [2022-03-18 00:24:00,412 INFO L226 Difference]: Without dead ends: 507 [2022-03-18 00:24:00,415 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3806 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=27558, Invalid=34692, Unknown=0, NotChecked=0, Total=62250 [2022-03-18 00:24:00,415 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1373 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:24:00,415 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 46 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:24:00,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-03-18 00:24:00,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 185. [2022-03-18 00:24:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:24:00,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2022-03-18 00:24:00,582 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2022-03-18 00:24:00,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:24:00,582 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2022-03-18 00:24:00,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:24:00,583 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2022-03-18 00:24:00,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-03-18 00:24:00,583 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:24:00,583 INFO L500 BasicCegarLoop]: trace histogram [82, 82, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:24:00,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-18 00:24:00,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:24:00,793 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:24:00,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:24:00,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2026273389, now seen corresponding path program 165 times [2022-03-18 00:24:00,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:24:00,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1592323838] [2022-03-18 00:24:00,794 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:24:00,794 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:24:00,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2026273389, now seen corresponding path program 166 times [2022-03-18 00:24:00,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:24:00,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974057381] [2022-03-18 00:24:00,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:24:00,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:24:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:02,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:24:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6731 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:24:02,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:24:02,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974057381] [2022-03-18 00:24:02,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974057381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:24:02,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003947999] [2022-03-18 00:24:02,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:24:02,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:24:02,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:24:02,948 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:24:02,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-18 00:24:03,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:24:03,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:24:03,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-18 00:24:03,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:24:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6731 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:24:03,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:24:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6731 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:24:10,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003947999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:24:10,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:24:10,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-03-18 00:24:10,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:24:10,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1592323838] [2022-03-18 00:24:10,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1592323838] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:24:10,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:24:10,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-18 00:24:10,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874737876] [2022-03-18 00:24:10,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:24:10,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-18 00:24:10,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:24:10,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-18 00:24:10,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-03-18 00:24:10,151 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:24:24,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:24:24,248 INFO L93 Difference]: Finished difference Result 527 states and 610 transitions. [2022-03-18 00:24:24,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-18 00:24:24,249 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2022-03-18 00:24:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:24:24,250 INFO L225 Difference]: With dead ends: 527 [2022-03-18 00:24:24,250 INFO L226 Difference]: Without dead ends: 513 [2022-03-18 00:24:24,253 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=28226, Invalid=35530, Unknown=0, NotChecked=0, Total=63756 [2022-03-18 00:24:24,253 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1412 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:24:24,254 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 46 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 00:24:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-03-18 00:24:24,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 187. [2022-03-18 00:24:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 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) [2022-03-18 00:24:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2022-03-18 00:24:24,429 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2022-03-18 00:24:24,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:24:24,430 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2022-03-18 00:24:24,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:24:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2022-03-18 00:24:24,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-03-18 00:24:24,431 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:24:24,431 INFO L500 BasicCegarLoop]: trace histogram [83, 83, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:24:24,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-18 00:24:24,645 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:24:24,645 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:24:24,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:24:24,645 INFO L85 PathProgramCache]: Analyzing trace with hash 904080309, now seen corresponding path program 167 times [2022-03-18 00:24:24,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:24:24,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1577361011] [2022-03-18 00:24:24,647 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:24:24,647 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:24:24,647 INFO L85 PathProgramCache]: Analyzing trace with hash 904080309, now seen corresponding path program 168 times [2022-03-18 00:24:24,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:24:24,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861555511] [2022-03-18 00:24:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:24:24,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:24:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:26,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:24:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6896 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:24:26,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:24:26,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861555511] [2022-03-18 00:24:26,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861555511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:24:26,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547442527] [2022-03-18 00:24:26,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:24:26,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:24:26,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:24:26,997 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:24:26,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-18 00:24:27,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:24:27,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:24:27,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:24:27,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:24:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6896 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2022-03-18 00:24:27,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:24:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6896 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2022-03-18 00:24:28,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547442527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:24:28,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:24:28,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 7, 7] total 93 [2022-03-18 00:24:28,204 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:24:28,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1577361011] [2022-03-18 00:24:28,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1577361011] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:24:28,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:24:28,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-18 00:24:28,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518864735] [2022-03-18 00:24:28,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:24:28,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-18 00:24:28,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:24:28,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-18 00:24:28,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4011, Invalid=4545, Unknown=0, NotChecked=0, Total=8556 [2022-03-18 00:24:28,207 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:24:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:24:42,454 INFO L93 Difference]: Finished difference Result 533 states and 617 transitions. [2022-03-18 00:24:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-18 00:24:42,455 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-03-18 00:24:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:24:42,456 INFO L225 Difference]: With dead ends: 533 [2022-03-18 00:24:42,456 INFO L226 Difference]: Without dead ends: 519 [2022-03-18 00:24:42,457 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 367 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4076 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=11572, Invalid=19580, Unknown=0, NotChecked=0, Total=31152 [2022-03-18 00:24:42,457 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1390 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1390 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:24:42,457 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1390 Valid, 31 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 00:24:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-03-18 00:24:42,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 189. [2022-03-18 00:24:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 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) [2022-03-18 00:24:42,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-03-18 00:24:42,636 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2022-03-18 00:24:42,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:24:42,636 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-03-18 00:24:42,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:24:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-03-18 00:24:42,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-03-18 00:24:42,637 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:24:42,637 INFO L500 BasicCegarLoop]: trace histogram [84, 84, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:24:42,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-18 00:24:42,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:24:42,837 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:24:42,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:24:42,837 INFO L85 PathProgramCache]: Analyzing trace with hash -524562089, now seen corresponding path program 169 times [2022-03-18 00:24:42,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:24:42,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1000294425] [2022-03-18 00:24:42,839 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:24:42,839 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:24:42,839 INFO L85 PathProgramCache]: Analyzing trace with hash -524562089, now seen corresponding path program 170 times [2022-03-18 00:24:42,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:24:42,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670354603] [2022-03-18 00:24:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:24:42,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:24:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:45,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:24:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7063 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:24:45,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:24:45,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670354603] [2022-03-18 00:24:45,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670354603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:24:45,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784257491] [2022-03-18 00:24:45,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:24:45,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:24:45,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:24:45,104 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:24:45,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-18 00:24:45,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:24:45,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:24:45,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-18 00:24:45,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:24:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7063 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:24:46,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:24:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7063 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:24:52,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784257491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:24:52,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:24:52,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-03-18 00:24:52,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:24:52,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1000294425] [2022-03-18 00:24:52,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1000294425] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:24:52,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:24:52,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-18 00:24:52,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560871501] [2022-03-18 00:24:52,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:24:52,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-18 00:24:52,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:24:52,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-18 00:24:52,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2022-03-18 00:24:52,592 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:25:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:25:07,670 INFO L93 Difference]: Finished difference Result 539 states and 624 transitions. [2022-03-18 00:25:07,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-18 00:25:07,670 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2022-03-18 00:25:07,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:25:07,672 INFO L225 Difference]: With dead ends: 539 [2022-03-18 00:25:07,672 INFO L226 Difference]: Without dead ends: 525 [2022-03-18 00:25:07,675 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=29586, Invalid=37236, Unknown=0, NotChecked=0, Total=66822 [2022-03-18 00:25:07,675 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1605 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:25:07,675 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1605 Valid, 36 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 00:25:07,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-03-18 00:25:07,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 191. [2022-03-18 00:25:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.010752688172043) internal successors, (188), 186 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) [2022-03-18 00:25:07,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2022-03-18 00:25:07,873 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2022-03-18 00:25:07,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:25:07,873 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2022-03-18 00:25:07,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:25:07,873 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2022-03-18 00:25:07,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-03-18 00:25:07,873 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:25:07,873 INFO L500 BasicCegarLoop]: trace histogram [85, 85, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:25:07,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-18 00:25:08,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:25:08,074 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:25:08,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:25:08,074 INFO L85 PathProgramCache]: Analyzing trace with hash 939628153, now seen corresponding path program 171 times [2022-03-18 00:25:08,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:25:08,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [346356124] [2022-03-18 00:25:08,075 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:25:08,075 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:25:08,075 INFO L85 PathProgramCache]: Analyzing trace with hash 939628153, now seen corresponding path program 172 times [2022-03-18 00:25:08,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:25:08,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302262087] [2022-03-18 00:25:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:25:08,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:25:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:25:10,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:25:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:25:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:25:10,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:25:10,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302262087] [2022-03-18 00:25:10,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302262087] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:25:10,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324667065] [2022-03-18 00:25:10,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:25:10,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:25:10,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:25:10,382 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:25:10,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-18 00:25:11,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:25:11,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:25:11,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-18 00:25:11,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:25:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:25:11,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:25:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7232 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:25:18,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324667065] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:25:18,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:25:18,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-03-18 00:25:18,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:25:18,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [346356124] [2022-03-18 00:25:18,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [346356124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:25:18,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:25:18,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-18 00:25:18,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332584831] [2022-03-18 00:25:18,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:25:18,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-18 00:25:18,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:25:18,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-18 00:25:18,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2022-03-18 00:25:18,042 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:25:33,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:25:33,753 INFO L93 Difference]: Finished difference Result 545 states and 631 transitions. [2022-03-18 00:25:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-18 00:25:33,754 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-03-18 00:25:33,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:25:33,755 INFO L225 Difference]: With dead ends: 545 [2022-03-18 00:25:33,755 INFO L226 Difference]: Without dead ends: 531 [2022-03-18 00:25:33,758 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4164 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=30278, Invalid=38104, Unknown=0, NotChecked=0, Total=68382 [2022-03-18 00:25:33,758 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1705 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1705 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:25:33,758 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1705 Valid, 46 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 00:25:33,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-03-18 00:25:33,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 193. [2022-03-18 00:25:33,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:25:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2022-03-18 00:25:33,944 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2022-03-18 00:25:33,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:25:33,944 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2022-03-18 00:25:33,944 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:25:33,944 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2022-03-18 00:25:33,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-03-18 00:25:33,945 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:25:33,945 INFO L500 BasicCegarLoop]: trace histogram [86, 86, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:25:33,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-18 00:25:34,145 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:25:34,145 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:25:34,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:25:34,146 INFO L85 PathProgramCache]: Analyzing trace with hash -722822373, now seen corresponding path program 173 times [2022-03-18 00:25:34,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:25:34,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1951188049] [2022-03-18 00:25:34,147 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:25:34,147 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:25:34,147 INFO L85 PathProgramCache]: Analyzing trace with hash -722822373, now seen corresponding path program 174 times [2022-03-18 00:25:34,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:25:34,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386901819] [2022-03-18 00:25:34,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:25:34,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:25:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:25:36,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:25:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:25:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7403 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:25:36,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:25:36,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386901819] [2022-03-18 00:25:36,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386901819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:25:36,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121516328] [2022-03-18 00:25:36,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:25:36,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:25:36,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:25:36,502 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:25:36,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-18 00:25:37,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:25:37,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:25:37,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:25:37,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:25:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7403 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7396 trivial. 0 not checked. [2022-03-18 00:25:37,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:25:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7403 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7396 trivial. 0 not checked. [2022-03-18 00:25:37,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121516328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:25:37,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:25:37,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 7, 7] total 96 [2022-03-18 00:25:37,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:25:37,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1951188049] [2022-03-18 00:25:37,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1951188049] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:25:37,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:25:37,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-18 00:25:37,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358417870] [2022-03-18 00:25:37,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:25:37,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-18 00:25:37,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:25:37,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-18 00:25:37,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4284, Invalid=4836, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 00:25:37,751 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:25:53,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:25:53,651 INFO L93 Difference]: Finished difference Result 551 states and 638 transitions. [2022-03-18 00:25:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-18 00:25:53,659 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2022-03-18 00:25:53,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:25:53,661 INFO L225 Difference]: With dead ends: 551 [2022-03-18 00:25:53,661 INFO L226 Difference]: Without dead ends: 537 [2022-03-18 00:25:53,662 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4352 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12376, Invalid=20930, Unknown=0, NotChecked=0, Total=33306 [2022-03-18 00:25:53,663 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1332 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1332 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:25:53,663 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1332 Valid, 46 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 00:25:53,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-03-18 00:25:53,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 195. [2022-03-18 00:25:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0105263157894737) internal successors, (192), 190 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:25:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2022-03-18 00:25:53,858 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2022-03-18 00:25:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:25:53,858 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2022-03-18 00:25:53,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:25:53,859 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2022-03-18 00:25:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-03-18 00:25:53,859 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:25:53,859 INFO L500 BasicCegarLoop]: trace histogram [87, 87, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:25:53,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-18 00:25:54,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-18 00:25:54,060 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:25:54,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:25:54,060 INFO L85 PathProgramCache]: Analyzing trace with hash -609943747, now seen corresponding path program 175 times [2022-03-18 00:25:54,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:25:54,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1775799824] [2022-03-18 00:25:54,061 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:25:54,061 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:25:54,061 INFO L85 PathProgramCache]: Analyzing trace with hash -609943747, now seen corresponding path program 176 times [2022-03-18 00:25:54,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:25:54,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141748629] [2022-03-18 00:25:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:25:54,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:25:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:25:56,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:25:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:25:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7576 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:25:56,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:25:56,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141748629] [2022-03-18 00:25:56,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141748629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:25:56,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292295372] [2022-03-18 00:25:56,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:25:56,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:25:56,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:25:56,524 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:25:56,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-18 00:25:57,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:25:57,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:25:57,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-18 00:25:57,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:25:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7576 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:25:57,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:26:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7576 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:26:04,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292295372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:26:04,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:26:04,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-03-18 00:26:04,663 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:26:04,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1775799824] [2022-03-18 00:26:04,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1775799824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:26:04,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:26:04,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-18 00:26:04,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884828843] [2022-03-18 00:26:04,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:26:04,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-18 00:26:04,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:26:04,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-18 00:26:04,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15933, Invalid=16287, Unknown=0, NotChecked=0, Total=32220 [2022-03-18 00:26:04,667 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:26:21,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:26:21,480 INFO L93 Difference]: Finished difference Result 557 states and 645 transitions. [2022-03-18 00:26:21,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-18 00:26:21,480 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2022-03-18 00:26:21,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:26:21,482 INFO L225 Difference]: With dead ends: 557 [2022-03-18 00:26:21,482 INFO L226 Difference]: Without dead ends: 543 [2022-03-18 00:26:21,484 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4349 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=31686, Invalid=39870, Unknown=0, NotChecked=0, Total=71556 [2022-03-18 00:26:21,484 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1506 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1506 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:26:21,484 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1506 Valid, 46 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 00:26:21,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-03-18 00:26:21,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 197. [2022-03-18 00:26:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:26:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2022-03-18 00:26:21,678 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2022-03-18 00:26:21,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:26:21,678 INFO L478 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2022-03-18 00:26:21,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:26:21,679 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2022-03-18 00:26:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-03-18 00:26:21,679 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:26:21,679 INFO L500 BasicCegarLoop]: trace histogram [88, 88, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:26:21,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-18 00:26:21,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:26:21,895 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:26:21,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:26:21,896 INFO L85 PathProgramCache]: Analyzing trace with hash 492233439, now seen corresponding path program 177 times [2022-03-18 00:26:21,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:26:21,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1544786395] [2022-03-18 00:26:21,897 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:26:21,897 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:26:21,897 INFO L85 PathProgramCache]: Analyzing trace with hash 492233439, now seen corresponding path program 178 times [2022-03-18 00:26:21,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:26:21,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805538852] [2022-03-18 00:26:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:26:21,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:26:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:26:24,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:26:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:26:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7751 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:26:24,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:26:24,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805538852] [2022-03-18 00:26:24,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805538852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:26:24,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505941459] [2022-03-18 00:26:24,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:26:24,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:26:24,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:26:24,385 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:26:24,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-18 00:26:25,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:26:25,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:26:25,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-18 00:26:25,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:26:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7751 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:26:25,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:26:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7751 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:26:32,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505941459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:26:32,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:26:32,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 182 [2022-03-18 00:26:32,592 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:26:32,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1544786395] [2022-03-18 00:26:32,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1544786395] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:26:32,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:26:32,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-18 00:26:32,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001488339] [2022-03-18 00:26:32,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:26:32,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-18 00:26:32,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:26:32,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-18 00:26:32,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16292, Invalid=16650, Unknown=0, NotChecked=0, Total=32942 [2022-03-18 00:26:32,595 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:26:50,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:26:50,012 INFO L93 Difference]: Finished difference Result 563 states and 652 transitions. [2022-03-18 00:26:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-18 00:26:50,012 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 196 [2022-03-18 00:26:50,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:26:50,014 INFO L225 Difference]: With dead ends: 563 [2022-03-18 00:26:50,014 INFO L226 Difference]: Without dead ends: 549 [2022-03-18 00:26:50,016 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=32402, Invalid=40768, Unknown=0, NotChecked=0, Total=73170 [2022-03-18 00:26:50,016 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1681 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:26:50,016 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1681 Valid, 21 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 00:26:50,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-03-18 00:26:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 199. [2022-03-18 00:26:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 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) [2022-03-18 00:26:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2022-03-18 00:26:50,215 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2022-03-18 00:26:50,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:26:50,215 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2022-03-18 00:26:50,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:26:50,215 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2022-03-18 00:26:50,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-03-18 00:26:50,216 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:26:50,216 INFO L500 BasicCegarLoop]: trace histogram [89, 89, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:26:50,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-18 00:26:50,416 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:26:50,416 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:26:50,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:26:50,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1172412927, now seen corresponding path program 179 times [2022-03-18 00:26:50,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:26:50,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [783699401] [2022-03-18 00:26:50,417 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:26:50,418 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:26:50,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1172412927, now seen corresponding path program 180 times [2022-03-18 00:26:50,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:26:50,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350735464] [2022-03-18 00:26:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:26:50,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:26:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:26:52,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:26:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:26:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7928 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 00:26:52,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:26:52,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350735464] [2022-03-18 00:26:52,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350735464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:26:52,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746665989] [2022-03-18 00:26:52,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:26:52,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:26:52,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:26:52,952 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) [2022-03-18 00:26:52,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-18 00:26:53,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:26:53,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:26:53,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:26:53,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:26:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7928 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7921 trivial. 0 not checked. [2022-03-18 00:26:53,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:26:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7928 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7921 trivial. 0 not checked. [2022-03-18 00:26:54,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746665989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:26:54,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:26:54,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 7, 7] total 99 [2022-03-18 00:26:54,244 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:26:54,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [783699401] [2022-03-18 00:26:54,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [783699401] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:26:54,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:26:54,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-18 00:26:54,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873348069] [2022-03-18 00:26:54,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:26:54,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-18 00:26:54,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:26:54,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-18 00:26:54,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4566, Invalid=5136, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 00:26:54,246 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand has 93 states, 93 states have (on average 2.043010752688172) internal successors, (190), 92 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)