/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/insertion_sort-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 02:45:19,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 02:45:19,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 02:45:19,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 02:45:19,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 02:45:19,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 02:45:19,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 02:45:19,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 02:45:19,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 02:45:19,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 02:45:19,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 02:45:19,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 02:45:19,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 02:45:19,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 02:45:19,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 02:45:19,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 02:45:19,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 02:45:19,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 02:45:19,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 02:45:19,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 02:45:19,926 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 02:45:19,931 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 02:45:19,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 02:45:19,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 02:45:19,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 02:45:19,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 02:45:19,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 02:45:19,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 02:45:19,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 02:45:19,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 02:45:19,933 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 02:45:19,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 02:45:19,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 02:45:19,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 02:45:19,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 02:45:19,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 02:45:19,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:45:19,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 02:45:19,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 02:45:19,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 02:45:19,935 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 02:45:19,935 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 02:45:20,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 02:45:20,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 02:45:20,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 02:45:20,164 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 02:45:20,164 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 02:45:20,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-2.c [2022-02-24 02:45:20,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ec792d4/2fed051286c9443a8ccda2c6eca8bc68/FLAG1f247d716 [2022-02-24 02:45:20,597 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 02:45:20,598 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c [2022-02-24 02:45:20,604 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ec792d4/2fed051286c9443a8ccda2c6eca8bc68/FLAG1f247d716 [2022-02-24 02:45:20,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ec792d4/2fed051286c9443a8ccda2c6eca8bc68 [2022-02-24 02:45:20,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 02:45:20,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 02:45:20,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 02:45:20,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 02:45:20,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 02:45:20,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:45:20" (1/1) ... [2022-02-24 02:45:20,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e2e7df8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:20, skipping insertion in model container [2022-02-24 02:45:20,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:45:20" (1/1) ... [2022-02-24 02:45:20,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 02:45:20,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 02:45:20,803 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c[328,341] [2022-02-24 02:45:20,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:45:20,829 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 02:45:20,840 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c[328,341] [2022-02-24 02:45:20,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:45:20,865 INFO L208 MainTranslator]: Completed translation [2022-02-24 02:45:20,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:20 WrapperNode [2022-02-24 02:45:20,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 02:45:20,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 02:45:20,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 02:45:20,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 02:45:20,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:20" (1/1) ... [2022-02-24 02:45:20,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:20" (1/1) ... [2022-02-24 02:45:20,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:20" (1/1) ... [2022-02-24 02:45:20,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:20" (1/1) ... [2022-02-24 02:45:20,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:20" (1/1) ... [2022-02-24 02:45:20,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:20" (1/1) ... [2022-02-24 02:45:20,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:20" (1/1) ... [2022-02-24 02:45:20,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 02:45:20,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 02:45:20,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 02:45:20,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 02:45:20,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:20" (1/1) ... [2022-02-24 02:45:20,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:45:20,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 02:45:20,936 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) [2022-02-24 02:45:20,938 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 [2022-02-24 02:45:20,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 02:45:20,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 02:45:20,966 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 02:45:20,966 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 02:45:20,966 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 02:45:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 02:45:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 02:45:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 02:45:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 02:45:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 02:45:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-24 02:45:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 02:45:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 02:45:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-24 02:45:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 02:45:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 02:45:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 02:45:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 02:45:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 02:45:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 02:45:21,023 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 02:45:21,024 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 02:45:21,168 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 02:45:21,174 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 02:45:21,174 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-02-24 02:45:21,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:45:21 BoogieIcfgContainer [2022-02-24 02:45:21,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 02:45:21,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 02:45:21,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 02:45:21,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 02:45:21,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 02:45:20" (1/3) ... [2022-02-24 02:45:21,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21eebfa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:45:21, skipping insertion in model container [2022-02-24 02:45:21,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:20" (2/3) ... [2022-02-24 02:45:21,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21eebfa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:45:21, skipping insertion in model container [2022-02-24 02:45:21,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:45:21" (3/3) ... [2022-02-24 02:45:21,184 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.c [2022-02-24 02:45:21,188 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 02:45:21,188 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 02:45:21,224 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 02:45:21,231 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, 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, mLoopAccelerationTechnique=QVASR [2022-02-24 02:45:21,231 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 02:45:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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) [2022-02-24 02:45:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 02:45:21,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:21,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:21,250 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:21,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:21,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1914549692, now seen corresponding path program 1 times [2022-02-24 02:45:21,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:21,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090517623] [2022-02-24 02:45:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:21,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:21,310 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:45:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:21,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:21,475 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:21,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090517623] [2022-02-24 02:45:21,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1090517623] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:21,476 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:21,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 02:45:21,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767130456] [2022-02-24 02:45:21,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:21,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 02:45:21,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:21,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 02:45:21,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 02:45:21,519 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:21,551 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-02-24 02:45:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 02:45:21,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-24 02:45:21,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:21,557 INFO L225 Difference]: With dead ends: 54 [2022-02-24 02:45:21,557 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 02:45:21,559 INFO L932 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 [2022-02-24 02:45:21,561 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 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 [2022-02-24 02:45:21,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:45:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 02:45:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-24 02:45:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-02-24 02:45:21,594 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-02-24 02:45:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:21,595 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-02-24 02:45:21,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:21,595 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-02-24 02:45:21,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 02:45:21,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:21,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:21,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 02:45:21,597 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:21,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash 314290466, now seen corresponding path program 1 times [2022-02-24 02:45:21,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:21,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650212143] [2022-02-24 02:45:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:21,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:21,600 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:45:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:21,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:21,732 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:21,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650212143] [2022-02-24 02:45:21,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [650212143] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:21,733 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:21,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 02:45:21,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839937341] [2022-02-24 02:45:21,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:21,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 02:45:21,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:21,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 02:45:21,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-24 02:45:21,735 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:21,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:21,865 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-02-24 02:45:21,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:45:21,865 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-24 02:45:21,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:21,866 INFO L225 Difference]: With dead ends: 49 [2022-02-24 02:45:21,866 INFO L226 Difference]: Without dead ends: 28 [2022-02-24 02:45:21,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:45:21,867 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:21,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 37 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-24 02:45:21,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-02-24 02:45:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:21,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-02-24 02:45:21,873 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2022-02-24 02:45:21,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:21,873 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-02-24 02:45:21,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:21,873 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-02-24 02:45:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 02:45:21,874 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:21,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:21,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 02:45:21,874 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:21,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:21,875 INFO L85 PathProgramCache]: Analyzing trace with hash 408725728, now seen corresponding path program 1 times [2022-02-24 02:45:21,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:21,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204591383] [2022-02-24 02:45:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:21,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:21,883 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:21,884 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:22,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:22,035 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:22,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204591383] [2022-02-24 02:45:22,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [204591383] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:22,035 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:22,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:45:22,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359142343] [2022-02-24 02:45:22,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:22,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:45:22,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:22,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:45:22,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:45:22,037 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:22,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:22,229 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2022-02-24 02:45:22,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:45:22,229 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 02:45:22,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:22,230 INFO L225 Difference]: With dead ends: 57 [2022-02-24 02:45:22,230 INFO L226 Difference]: Without dead ends: 36 [2022-02-24 02:45:22,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:45:22,232 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:22,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 40 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:22,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-24 02:45:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-02-24 02:45:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-02-24 02:45:22,238 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 17 [2022-02-24 02:45:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:22,238 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-02-24 02:45:22,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-02-24 02:45:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 02:45:22,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:22,239 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:22,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 02:45:22,239 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:22,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1080556849, now seen corresponding path program 1 times [2022-02-24 02:45:22,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:22,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192952488] [2022-02-24 02:45:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:22,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:22,245 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:22,245 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:22,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:22,742 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:22,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192952488] [2022-02-24 02:45:22,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1192952488] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:22,742 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:22,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:45:22,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701741662] [2022-02-24 02:45:22,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:22,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:45:22,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:22,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:45:22,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:45:22,747 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:23,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:23,310 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-02-24 02:45:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 02:45:23,311 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 02:45:23,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:23,315 INFO L225 Difference]: With dead ends: 65 [2022-02-24 02:45:23,316 INFO L226 Difference]: Without dead ends: 63 [2022-02-24 02:45:23,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 02:45:23,324 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 91 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:23,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 51 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:23,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-24 02:45:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 44. [2022-02-24 02:45:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-02-24 02:45:23,341 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 25 [2022-02-24 02:45:23,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:23,341 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-02-24 02:45:23,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:23,342 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-02-24 02:45:23,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 02:45:23,344 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:23,345 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:23,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 02:45:23,345 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:23,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:23,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1781621427, now seen corresponding path program 1 times [2022-02-24 02:45:23,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:23,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927326507] [2022-02-24 02:45:23,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:23,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:23,358 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:23,359 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:23,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:23,412 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:23,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927326507] [2022-02-24 02:45:23,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [927326507] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:23,412 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:23,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 02:45:23,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876040346] [2022-02-24 02:45:23,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:23,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 02:45:23,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:23,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 02:45:23,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 02:45:23,414 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:23,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:23,506 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2022-02-24 02:45:23,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 02:45:23,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 02:45:23,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:23,510 INFO L225 Difference]: With dead ends: 82 [2022-02-24 02:45:23,510 INFO L226 Difference]: Without dead ends: 51 [2022-02-24 02:45:23,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:23,515 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:23,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 30 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:23,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-24 02:45:23,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-02-24 02:45:23,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-02-24 02:45:23,539 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 25 [2022-02-24 02:45:23,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:23,539 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-02-24 02:45:23,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:23,539 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-02-24 02:45:23,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 02:45:23,540 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:23,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:23,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 02:45:23,540 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:23,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:23,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1755898038, now seen corresponding path program 1 times [2022-02-24 02:45:23,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:23,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079662280] [2022-02-24 02:45:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:23,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:23,543 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:23,543 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:23,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:23,892 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:23,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079662280] [2022-02-24 02:45:23,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2079662280] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:23,892 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:23,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:45:23,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565983596] [2022-02-24 02:45:23,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:23,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:45:23,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:23,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:45:23,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:45:23,894 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:24,424 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2022-02-24 02:45:24,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 02:45:24,425 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 02:45:24,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:24,425 INFO L225 Difference]: With dead ends: 111 [2022-02-24 02:45:24,426 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 02:45:24,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 02:45:24,427 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 76 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:24,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 75 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 02:45:24,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 50. [2022-02-24 02:45:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:24,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-02-24 02:45:24,441 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 28 [2022-02-24 02:45:24,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:24,442 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-02-24 02:45:24,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,443 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-02-24 02:45:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 02:45:24,444 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:24,444 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:24,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 02:45:24,444 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:24,445 INFO L85 PathProgramCache]: Analyzing trace with hash -990333180, now seen corresponding path program 2 times [2022-02-24 02:45:24,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:24,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035667620] [2022-02-24 02:45:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:24,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:24,450 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:24,450 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:24,567 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:24,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035667620] [2022-02-24 02:45:24,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1035667620] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:24,567 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:24,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:45:24,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119745436] [2022-02-24 02:45:24,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:24,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:45:24,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:24,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:45:24,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:24,569 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:24,754 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2022-02-24 02:45:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:45:24,754 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 02:45:24,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:24,755 INFO L225 Difference]: With dead ends: 125 [2022-02-24 02:45:24,755 INFO L226 Difference]: Without dead ends: 91 [2022-02-24 02:45:24,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:45:24,756 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 108 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:24,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 55 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:24,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-24 02:45:24,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2022-02-24 02:45:24,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 56 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:24,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-02-24 02:45:24,773 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 31 [2022-02-24 02:45:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:24,773 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-02-24 02:45:24,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-02-24 02:45:24,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 02:45:24,774 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:24,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:24,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 02:45:24,774 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:24,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:24,774 INFO L85 PathProgramCache]: Analyzing trace with hash -405243253, now seen corresponding path program 1 times [2022-02-24 02:45:24,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:24,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350843200] [2022-02-24 02:45:24,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:24,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:24,777 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:24,777 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 02:45:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:24,872 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:24,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350843200] [2022-02-24 02:45:24,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1350843200] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:24,872 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:24,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:45:24,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085607844] [2022-02-24 02:45:24,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:24,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:45:24,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:24,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:45:24,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:24,873 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:25,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:25,066 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2022-02-24 02:45:25,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 02:45:25,067 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-02-24 02:45:25,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:25,068 INFO L225 Difference]: With dead ends: 100 [2022-02-24 02:45:25,068 INFO L226 Difference]: Without dead ends: 73 [2022-02-24 02:45:25,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:45:25,069 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 87 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:25,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 54 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:25,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-24 02:45:25,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2022-02-24 02:45:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.2) internal successors, (60), 51 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-02-24 02:45:25,092 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 33 [2022-02-24 02:45:25,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:25,093 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-02-24 02:45:25,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:25,093 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-02-24 02:45:25,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 02:45:25,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:25,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:25,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 02:45:25,094 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:25,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:25,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1306424002, now seen corresponding path program 3 times [2022-02-24 02:45:25,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:25,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996850949] [2022-02-24 02:45:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:25,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:25,099 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:25,099 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:25,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:25,501 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:25,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996850949] [2022-02-24 02:45:25,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1996850949] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:25,501 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:25,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:45:25,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883884606] [2022-02-24 02:45:25,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:25,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:45:25,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:25,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:45:25,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:45:25,502 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:26,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:26,066 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2022-02-24 02:45:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 02:45:26,067 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 02:45:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:26,067 INFO L225 Difference]: With dead ends: 111 [2022-02-24 02:45:26,068 INFO L226 Difference]: Without dead ends: 109 [2022-02-24 02:45:26,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=1206, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 02:45:26,069 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 140 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:26,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 61 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-24 02:45:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 65. [2022-02-24 02:45:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 58 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-02-24 02:45:26,085 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 33 [2022-02-24 02:45:26,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:26,085 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-02-24 02:45:26,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:26,085 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-02-24 02:45:26,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 02:45:26,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:26,086 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:26,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 02:45:26,086 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:26,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:26,087 INFO L85 PathProgramCache]: Analyzing trace with hash -350564349, now seen corresponding path program 1 times [2022-02-24 02:45:26,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:26,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120651937] [2022-02-24 02:45:26,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:26,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:26,089 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:26,089 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:26,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:26,330 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:26,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120651937] [2022-02-24 02:45:26,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2120651937] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:26,330 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:26,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:45:26,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560282776] [2022-02-24 02:45:26,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:26,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:45:26,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:26,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:45:26,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:45:26,332 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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) [2022-02-24 02:45:27,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:27,107 INFO L93 Difference]: Finished difference Result 158 states and 202 transitions. [2022-02-24 02:45:27,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 02:45:27,108 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 36 [2022-02-24 02:45:27,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:27,109 INFO L225 Difference]: With dead ends: 158 [2022-02-24 02:45:27,109 INFO L226 Difference]: Without dead ends: 156 [2022-02-24 02:45:27,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 02:45:27,112 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 189 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:27,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 51 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:45:27,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-24 02:45:27,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 76. [2022-02-24 02:45:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 69 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:27,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2022-02-24 02:45:27,145 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 36 [2022-02-24 02:45:27,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:27,146 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2022-02-24 02:45:27,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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) [2022-02-24 02:45:27,147 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2022-02-24 02:45:27,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 02:45:27,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:27,148 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:27,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 02:45:27,148 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:27,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:27,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1169352267, now seen corresponding path program 2 times [2022-02-24 02:45:27,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:27,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047716925] [2022-02-24 02:45:27,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:27,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:27,153 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:27,153 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:27,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:27,525 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:27,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047716925] [2022-02-24 02:45:27,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1047716925] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:27,525 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:27,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 02:45:27,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406666059] [2022-02-24 02:45:27,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:27,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 02:45:27,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:27,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 02:45:27,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:45:27,526 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2022-02-24 02:45:28,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:28,201 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2022-02-24 02:45:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 02:45:28,202 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 36 [2022-02-24 02:45:28,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:28,202 INFO L225 Difference]: With dead ends: 170 [2022-02-24 02:45:28,202 INFO L226 Difference]: Without dead ends: 132 [2022-02-24 02:45:28,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 02:45:28,204 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 116 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:28,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 74 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:45:28,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-24 02:45:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 87. [2022-02-24 02:45:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 80 states have internal predecessors, (104), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:28,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2022-02-24 02:45:28,225 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 36 [2022-02-24 02:45:28,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:28,225 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2022-02-24 02:45:28,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2022-02-24 02:45:28,225 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2022-02-24 02:45:28,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 02:45:28,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:28,226 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:28,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 02:45:28,226 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:28,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:28,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1855259691, now seen corresponding path program 4 times [2022-02-24 02:45:28,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:28,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976577446] [2022-02-24 02:45:28,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:28,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:28,229 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:28,229 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:28,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:28,367 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:28,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976577446] [2022-02-24 02:45:28,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [976577446] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:28,367 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:28,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:45:28,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286600786] [2022-02-24 02:45:28,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:28,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:45:28,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:28,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:45:28,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:45:28,368 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:28,828 INFO L93 Difference]: Finished difference Result 232 states and 306 transitions. [2022-02-24 02:45:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:45:28,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-24 02:45:28,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:28,829 INFO L225 Difference]: With dead ends: 232 [2022-02-24 02:45:28,829 INFO L226 Difference]: Without dead ends: 192 [2022-02-24 02:45:28,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:45:28,830 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 165 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:28,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 71 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:28,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-24 02:45:28,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 135. [2022-02-24 02:45:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:28,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 177 transitions. [2022-02-24 02:45:28,871 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 177 transitions. Word has length 39 [2022-02-24 02:45:28,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:28,871 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 177 transitions. [2022-02-24 02:45:28,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:28,872 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 177 transitions. [2022-02-24 02:45:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 02:45:28,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:28,872 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:28,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 02:45:28,872 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:28,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1631396062, now seen corresponding path program 2 times [2022-02-24 02:45:28,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:28,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177021403] [2022-02-24 02:45:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:28,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:28,885 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:28,885 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:28,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:28,934 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:28,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177021403] [2022-02-24 02:45:28,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1177021403] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:28,934 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:28,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:45:28,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791252000] [2022-02-24 02:45:28,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:28,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:45:28,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:28,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:45:28,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:28,935 INFO L87 Difference]: Start difference. First operand 135 states and 177 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:29,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:29,196 INFO L93 Difference]: Finished difference Result 221 states and 286 transitions. [2022-02-24 02:45:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 02:45:29,196 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-24 02:45:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:29,197 INFO L225 Difference]: With dead ends: 221 [2022-02-24 02:45:29,197 INFO L226 Difference]: Without dead ends: 154 [2022-02-24 02:45:29,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:45:29,198 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:29,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 52 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-02-24 02:45:29,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 103. [2022-02-24 02:45:29,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 95 states have (on average 1.231578947368421) internal successors, (117), 96 states have internal predecessors, (117), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2022-02-24 02:45:29,228 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 39 [2022-02-24 02:45:29,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:29,228 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2022-02-24 02:45:29,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2022-02-24 02:45:29,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 02:45:29,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:29,228 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:29,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 02:45:29,229 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:29,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:29,229 INFO L85 PathProgramCache]: Analyzing trace with hash -930331484, now seen corresponding path program 3 times [2022-02-24 02:45:29,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:29,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137824885] [2022-02-24 02:45:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:29,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:29,231 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:29,231 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:29,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:29,535 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:29,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137824885] [2022-02-24 02:45:29,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [137824885] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:29,535 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:29,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 02:45:29,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253603642] [2022-02-24 02:45:29,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:29,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 02:45:29,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:29,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 02:45:29,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:45:29,537 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:30,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:30,949 INFO L93 Difference]: Finished difference Result 236 states and 286 transitions. [2022-02-24 02:45:30,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 02:45:30,950 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-24 02:45:30,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:30,951 INFO L225 Difference]: With dead ends: 236 [2022-02-24 02:45:30,951 INFO L226 Difference]: Without dead ends: 196 [2022-02-24 02:45:30,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=538, Invalid=3002, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 02:45:30,953 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 133 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:30,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 76 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:45:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-02-24 02:45:30,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 99. [2022-02-24 02:45:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 91 states have (on average 1.2087912087912087) internal successors, (110), 92 states have internal predecessors, (110), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2022-02-24 02:45:30,995 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 39 [2022-02-24 02:45:30,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:30,996 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2022-02-24 02:45:30,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2022-02-24 02:45:30,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 02:45:30,996 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:30,996 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:30,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 02:45:30,996 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:30,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:30,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1624035100, now seen corresponding path program 2 times [2022-02-24 02:45:30,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:30,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668441867] [2022-02-24 02:45:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:30,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:30,999 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:30,999 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:31,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:31,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 02:45:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:31,157 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:31,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668441867] [2022-02-24 02:45:31,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [668441867] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:31,157 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:31,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:45:31,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357287037] [2022-02-24 02:45:31,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:31,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:45:31,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:31,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:45:31,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:45:31,159 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:31,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:31,590 INFO L93 Difference]: Finished difference Result 141 states and 167 transitions. [2022-02-24 02:45:31,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 02:45:31,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-02-24 02:45:31,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:31,591 INFO L225 Difference]: With dead ends: 141 [2022-02-24 02:45:31,591 INFO L226 Difference]: Without dead ends: 139 [2022-02-24 02:45:31,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:45:31,592 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 113 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:31,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 82 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:31,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-24 02:45:31,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2022-02-24 02:45:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 110 states have internal predecessors, (129), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:45:31,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2022-02-24 02:45:31,632 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 41 [2022-02-24 02:45:31,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:31,632 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2022-02-24 02:45:31,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:31,632 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2022-02-24 02:45:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 02:45:31,633 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:31,633 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:31,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 02:45:31,634 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:31,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:31,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1831868819, now seen corresponding path program 5 times [2022-02-24 02:45:31,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:31,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107037881] [2022-02-24 02:45:31,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:31,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:31,636 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:31,636 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:32,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:32,092 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:32,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107037881] [2022-02-24 02:45:32,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [107037881] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:32,092 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:32,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:45:32,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783859302] [2022-02-24 02:45:32,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:32,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:45:32,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:32,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:45:32,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:45:32,094 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:32,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:32,832 INFO L93 Difference]: Finished difference Result 180 states and 214 transitions. [2022-02-24 02:45:32,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 02:45:32,832 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-24 02:45:32,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:32,833 INFO L225 Difference]: With dead ends: 180 [2022-02-24 02:45:32,833 INFO L226 Difference]: Without dead ends: 178 [2022-02-24 02:45:32,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=338, Invalid=1642, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 02:45:32,834 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 195 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:32,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 57 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:45:32,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-24 02:45:32,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 143. [2022-02-24 02:45:32,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 133 states have internal predecessors, (155), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:32,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2022-02-24 02:45:32,900 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 41 [2022-02-24 02:45:32,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:32,901 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2022-02-24 02:45:32,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:32,901 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2022-02-24 02:45:32,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 02:45:32,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:32,901 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:32,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 02:45:32,902 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:32,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:32,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2084807843, now seen corresponding path program 1 times [2022-02-24 02:45:32,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:32,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948862183] [2022-02-24 02:45:32,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:32,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:32,904 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:32,905 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:33,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:33,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 02:45:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:33,105 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:33,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948862183] [2022-02-24 02:45:33,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [948862183] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:33,105 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:33,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:45:33,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734609577] [2022-02-24 02:45:33,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:33,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:45:33,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:33,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:45:33,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:45:33,106 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:33,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:33,831 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2022-02-24 02:45:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 02:45:33,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-02-24 02:45:33,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:33,832 INFO L225 Difference]: With dead ends: 186 [2022-02-24 02:45:33,832 INFO L226 Difference]: Without dead ends: 184 [2022-02-24 02:45:33,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=1507, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 02:45:33,833 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 117 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:33,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 79 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:45:33,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-24 02:45:33,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 146. [2022-02-24 02:45:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 133 states have (on average 1.1954887218045114) internal successors, (159), 136 states have internal predecessors, (159), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 172 transitions. [2022-02-24 02:45:33,895 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 172 transitions. Word has length 44 [2022-02-24 02:45:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:33,895 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 172 transitions. [2022-02-24 02:45:33,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:33,897 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 172 transitions. [2022-02-24 02:45:33,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 02:45:33,897 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:33,897 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:33,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 02:45:33,898 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:33,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:33,899 INFO L85 PathProgramCache]: Analyzing trace with hash 521215711, now seen corresponding path program 1 times [2022-02-24 02:45:33,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:33,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879938136] [2022-02-24 02:45:33,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:33,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:33,903 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:33,903 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:33,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:33,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 02:45:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:33,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:33,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879938136] [2022-02-24 02:45:33,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [879938136] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:33,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:33,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 02:45:33,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290646661] [2022-02-24 02:45:33,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:33,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 02:45:33,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:33,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 02:45:33,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:45:33,951 INFO L87 Difference]: Start difference. First operand 146 states and 172 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:34,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:34,141 INFO L93 Difference]: Finished difference Result 233 states and 280 transitions. [2022-02-24 02:45:34,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:45:34,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-02-24 02:45:34,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:34,142 INFO L225 Difference]: With dead ends: 233 [2022-02-24 02:45:34,142 INFO L226 Difference]: Without dead ends: 179 [2022-02-24 02:45:34,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:45:34,143 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 94 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:34,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 51 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:34,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-24 02:45:34,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 149. [2022-02-24 02:45:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 136 states have (on average 1.1691176470588236) internal successors, (159), 139 states have internal predecessors, (159), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 172 transitions. [2022-02-24 02:45:34,203 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 172 transitions. Word has length 44 [2022-02-24 02:45:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:34,203 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 172 transitions. [2022-02-24 02:45:34,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:34,204 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 172 transitions. [2022-02-24 02:45:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 02:45:34,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:34,204 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:34,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 02:45:34,204 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:34,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:34,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1979815022, now seen corresponding path program 3 times [2022-02-24 02:45:34,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:34,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623873215] [2022-02-24 02:45:34,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:34,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:34,224 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:34,224 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:34,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:34,756 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:34,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623873215] [2022-02-24 02:45:34,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1623873215] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:34,756 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:34,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 02:45:34,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782389809] [2022-02-24 02:45:34,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:34,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 02:45:34,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:34,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 02:45:34,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:45:34,757 INFO L87 Difference]: Start difference. First operand 149 states and 172 transitions. Second operand has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 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) [2022-02-24 02:45:36,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:36,011 INFO L93 Difference]: Finished difference Result 245 states and 289 transitions. [2022-02-24 02:45:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 02:45:36,011 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 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 44 [2022-02-24 02:45:36,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:36,013 INFO L225 Difference]: With dead ends: 245 [2022-02-24 02:45:36,013 INFO L226 Difference]: Without dead ends: 243 [2022-02-24 02:45:36,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=493, Invalid=2929, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 02:45:36,014 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 225 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:36,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 61 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:45:36,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-24 02:45:36,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 158. [2022-02-24 02:45:36,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 145 states have (on average 1.1793103448275861) internal successors, (171), 148 states have internal predecessors, (171), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:36,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 184 transitions. [2022-02-24 02:45:36,098 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 184 transitions. Word has length 44 [2022-02-24 02:45:36,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:36,098 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 184 transitions. [2022-02-24 02:45:36,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 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) [2022-02-24 02:45:36,099 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 184 transitions. [2022-02-24 02:45:36,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 02:45:36,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:36,099 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:36,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 02:45:36,099 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:36,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:36,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1128449496, now seen corresponding path program 4 times [2022-02-24 02:45:36,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:36,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597597799] [2022-02-24 02:45:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:36,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:36,103 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:36,103 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:36,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:36,420 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:36,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597597799] [2022-02-24 02:45:36,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [597597799] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:36,420 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:36,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 02:45:36,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981413164] [2022-02-24 02:45:36,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:36,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 02:45:36,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:36,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 02:45:36,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:45:36,422 INFO L87 Difference]: Start difference. First operand 158 states and 184 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2022-02-24 02:45:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:37,477 INFO L93 Difference]: Finished difference Result 214 states and 250 transitions. [2022-02-24 02:45:37,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 02:45:37,478 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 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 44 [2022-02-24 02:45:37,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:37,479 INFO L225 Difference]: With dead ends: 214 [2022-02-24 02:45:37,479 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 02:45:37,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=404, Invalid=1852, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 02:45:37,480 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 163 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:37,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 93 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:37,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 02:45:37,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 158. [2022-02-24 02:45:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 145 states have (on average 1.1793103448275861) internal successors, (171), 148 states have internal predecessors, (171), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:37,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 184 transitions. [2022-02-24 02:45:37,543 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 184 transitions. Word has length 44 [2022-02-24 02:45:37,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:37,543 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 184 transitions. [2022-02-24 02:45:37,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2022-02-24 02:45:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 184 transitions. [2022-02-24 02:45:37,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 02:45:37,544 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:37,544 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:37,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 02:45:37,544 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:37,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:37,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1585209602, now seen corresponding path program 2 times [2022-02-24 02:45:37,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:37,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821211313] [2022-02-24 02:45:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:37,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:37,546 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:37,546 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:38,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:38,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 02:45:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:38,065 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:38,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821211313] [2022-02-24 02:45:38,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1821211313] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:38,066 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:38,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 02:45:38,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101771154] [2022-02-24 02:45:38,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:38,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 02:45:38,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:38,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 02:45:38,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:45:38,067 INFO L87 Difference]: Start difference. First operand 158 states and 184 transitions. Second operand has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:39,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:39,330 INFO L93 Difference]: Finished difference Result 245 states and 286 transitions. [2022-02-24 02:45:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 02:45:39,331 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-02-24 02:45:39,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:39,332 INFO L225 Difference]: With dead ends: 245 [2022-02-24 02:45:39,332 INFO L226 Difference]: Without dead ends: 243 [2022-02-24 02:45:39,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=493, Invalid=3047, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 02:45:39,333 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 189 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:39,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 82 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:45:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-24 02:45:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 173. [2022-02-24 02:45:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 160 states have (on average 1.18125) internal successors, (189), 163 states have internal predecessors, (189), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:39,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 202 transitions. [2022-02-24 02:45:39,404 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 202 transitions. Word has length 47 [2022-02-24 02:45:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:39,404 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 202 transitions. [2022-02-24 02:45:39,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:39,405 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 202 transitions. [2022-02-24 02:45:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 02:45:39,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:39,405 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:39,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 02:45:39,405 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:39,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:39,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1571697014, now seen corresponding path program 3 times [2022-02-24 02:45:39,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:39,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633181174] [2022-02-24 02:45:39,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:39,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:39,408 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:39,408 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:39,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:39,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:39,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 02:45:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:39,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 02:45:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:39,582 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:39,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633181174] [2022-02-24 02:45:39,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1633181174] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:39,582 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:39,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:45:39,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396635426] [2022-02-24 02:45:39,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:39,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:45:39,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:39,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:45:39,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:45:39,583 INFO L87 Difference]: Start difference. First operand 173 states and 202 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:40,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:40,096 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2022-02-24 02:45:40,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:45:40,097 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2022-02-24 02:45:40,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:40,098 INFO L225 Difference]: With dead ends: 217 [2022-02-24 02:45:40,098 INFO L226 Difference]: Without dead ends: 172 [2022-02-24 02:45:40,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:45:40,099 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 125 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:40,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 77 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:45:40,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-02-24 02:45:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 150. [2022-02-24 02:45:40,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.144927536231884) internal successors, (158), 141 states have internal predecessors, (158), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:45:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2022-02-24 02:45:40,158 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 49 [2022-02-24 02:45:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:40,158 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2022-02-24 02:45:40,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2022-02-24 02:45:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 02:45:40,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:40,159 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:40,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 02:45:40,159 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:40,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:40,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1212783309, now seen corresponding path program 5 times [2022-02-24 02:45:40,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:40,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408130211] [2022-02-24 02:45:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:40,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:40,161 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:40,162 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:40,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:40,405 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:40,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408130211] [2022-02-24 02:45:40,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [408130211] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:40,405 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:40,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:45:40,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564696903] [2022-02-24 02:45:40,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:40,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:45:40,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:40,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:45:40,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:45:40,406 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:41,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:41,478 INFO L93 Difference]: Finished difference Result 235 states and 277 transitions. [2022-02-24 02:45:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 02:45:41,478 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-24 02:45:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:41,479 INFO L225 Difference]: With dead ends: 235 [2022-02-24 02:45:41,479 INFO L226 Difference]: Without dead ends: 233 [2022-02-24 02:45:41,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=875, Invalid=2907, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 02:45:41,481 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 181 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:41,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 70 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:45:41,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-02-24 02:45:41,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2022-02-24 02:45:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 155 states have internal predecessors, (177), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:45:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2022-02-24 02:45:41,551 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 47 [2022-02-24 02:45:41,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:41,551 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2022-02-24 02:45:41,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2022-02-24 02:45:41,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 02:45:41,552 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:41,552 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:41,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 02:45:41,552 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:41,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:41,553 INFO L85 PathProgramCache]: Analyzing trace with hash -511718731, now seen corresponding path program 4 times [2022-02-24 02:45:41,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:41,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787234521] [2022-02-24 02:45:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:41,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:41,555 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:41,555 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:41,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:41,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:41,603 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:41,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787234521] [2022-02-24 02:45:41,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [787234521] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:41,603 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:41,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:45:41,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187755782] [2022-02-24 02:45:41,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:41,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:45:41,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:41,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:45:41,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:45:41,604 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:41,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:41,959 INFO L93 Difference]: Finished difference Result 234 states and 280 transitions. [2022-02-24 02:45:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 02:45:41,960 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-24 02:45:41,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:41,961 INFO L225 Difference]: With dead ends: 234 [2022-02-24 02:45:41,961 INFO L226 Difference]: Without dead ends: 211 [2022-02-24 02:45:41,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:45:41,961 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 100 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:41,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 58 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-02-24 02:45:42,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 170. [2022-02-24 02:45:42,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 158 states have (on average 1.1708860759493671) internal successors, (185), 161 states have internal predecessors, (185), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:45:42,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 197 transitions. [2022-02-24 02:45:42,033 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 197 transitions. Word has length 47 [2022-02-24 02:45:42,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:42,034 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 197 transitions. [2022-02-24 02:45:42,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 197 transitions. [2022-02-24 02:45:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 02:45:42,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:42,034 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:42,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 02:45:42,034 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:42,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:42,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1895537965, now seen corresponding path program 6 times [2022-02-24 02:45:42,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:42,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415063569] [2022-02-24 02:45:42,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:42,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:42,037 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:42,037 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:42,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:42,528 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:42,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415063569] [2022-02-24 02:45:42,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1415063569] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:42,528 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:42,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 02:45:42,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700801173] [2022-02-24 02:45:42,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:42,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 02:45:42,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:42,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 02:45:42,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:45:42,529 INFO L87 Difference]: Start difference. First operand 170 states and 197 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:43,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:43,711 INFO L93 Difference]: Finished difference Result 262 states and 307 transitions. [2022-02-24 02:45:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 02:45:43,711 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-24 02:45:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:43,712 INFO L225 Difference]: With dead ends: 262 [2022-02-24 02:45:43,712 INFO L226 Difference]: Without dead ends: 223 [2022-02-24 02:45:43,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=487, Invalid=2935, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 02:45:43,713 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 186 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:43,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 55 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:43,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-02-24 02:45:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 178. [2022-02-24 02:45:43,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 166 states have (on average 1.1746987951807228) internal successors, (195), 169 states have internal predecessors, (195), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:45:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 207 transitions. [2022-02-24 02:45:43,788 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 207 transitions. Word has length 47 [2022-02-24 02:45:43,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:43,788 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 207 transitions. [2022-02-24 02:45:43,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:43,788 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 207 transitions. [2022-02-24 02:45:43,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 02:45:43,789 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:43,789 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:43,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 02:45:43,789 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:43,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:43,789 INFO L85 PathProgramCache]: Analyzing trace with hash -879512715, now seen corresponding path program 5 times [2022-02-24 02:45:43,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:43,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686434507] [2022-02-24 02:45:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:43,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:43,791 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:43,791 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:44,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:44,216 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:44,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686434507] [2022-02-24 02:45:44,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [686434507] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:44,216 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:44,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:45:44,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327436716] [2022-02-24 02:45:44,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:44,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:45:44,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:44,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:45:44,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:45:44,217 INFO L87 Difference]: Start difference. First operand 178 states and 207 transitions. Second operand has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:45,202 INFO L93 Difference]: Finished difference Result 210 states and 243 transitions. [2022-02-24 02:45:45,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 02:45:45,202 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-24 02:45:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:45,203 INFO L225 Difference]: With dead ends: 210 [2022-02-24 02:45:45,203 INFO L226 Difference]: Without dead ends: 208 [2022-02-24 02:45:45,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=1860, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 02:45:45,204 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 144 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:45,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 107 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:45:45,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-24 02:45:45,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 163. [2022-02-24 02:45:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 152 states have (on average 1.1710526315789473) internal successors, (178), 154 states have internal predecessors, (178), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:45:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 188 transitions. [2022-02-24 02:45:45,274 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 188 transitions. Word has length 47 [2022-02-24 02:45:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:45,274 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 188 transitions. [2022-02-24 02:45:45,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 188 transitions. [2022-02-24 02:45:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 02:45:45,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:45,275 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:45,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 02:45:45,275 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:45,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:45,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2050746395, now seen corresponding path program 6 times [2022-02-24 02:45:45,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:45,275 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671809149] [2022-02-24 02:45:45,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:45,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:45,277 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:45,277 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:45,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:45,680 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:45,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671809149] [2022-02-24 02:45:45,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [671809149] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:45,680 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:45,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 02:45:45,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396610244] [2022-02-24 02:45:45,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:45,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 02:45:45,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:45,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 02:45:45,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:45:45,681 INFO L87 Difference]: Start difference. First operand 163 states and 188 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:46,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:46,386 INFO L93 Difference]: Finished difference Result 219 states and 253 transitions. [2022-02-24 02:45:46,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 02:45:46,386 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-24 02:45:46,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:46,387 INFO L225 Difference]: With dead ends: 219 [2022-02-24 02:45:46,387 INFO L226 Difference]: Without dead ends: 217 [2022-02-24 02:45:46,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=271, Invalid=1709, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 02:45:46,388 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 112 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:46,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 80 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:45:46,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-02-24 02:45:46,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 163. [2022-02-24 02:45:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 152 states have (on average 1.1710526315789473) internal successors, (178), 154 states have internal predecessors, (178), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:45:46,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 188 transitions. [2022-02-24 02:45:46,466 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 188 transitions. Word has length 47 [2022-02-24 02:45:46,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:46,466 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 188 transitions. [2022-02-24 02:45:46,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:46,466 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 188 transitions. [2022-02-24 02:45:46,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 02:45:46,467 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:46,467 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:46,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 02:45:46,467 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:46,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:46,467 INFO L85 PathProgramCache]: Analyzing trace with hash 183964909, now seen corresponding path program 4 times [2022-02-24 02:45:46,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:46,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852040985] [2022-02-24 02:45:46,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:46,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:46,469 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:46,469 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:46,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:46,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 02:45:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:46,719 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:46,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852040985] [2022-02-24 02:45:46,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [852040985] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:46,719 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:46,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:45:46,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107339949] [2022-02-24 02:45:46,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:46,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:45:46,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:46,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:45:46,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:45:46,720 INFO L87 Difference]: Start difference. First operand 163 states and 188 transitions. Second operand has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:47,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:47,330 INFO L93 Difference]: Finished difference Result 190 states and 219 transitions. [2022-02-24 02:45:47,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 02:45:47,330 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-02-24 02:45:47,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:47,331 INFO L225 Difference]: With dead ends: 190 [2022-02-24 02:45:47,331 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 02:45:47,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 02:45:47,332 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 107 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:47,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 83 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:45:47,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 02:45:47,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 177. [2022-02-24 02:45:47,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 163 states have (on average 1.165644171779141) internal successors, (190), 166 states have internal predecessors, (190), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 204 transitions. [2022-02-24 02:45:47,421 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 204 transitions. Word has length 49 [2022-02-24 02:45:47,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:47,421 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 204 transitions. [2022-02-24 02:45:47,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:47,421 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 204 transitions. [2022-02-24 02:45:47,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 02:45:47,422 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:47,422 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:47,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 02:45:47,422 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:47,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:47,422 INFO L85 PathProgramCache]: Analyzing trace with hash -42029369, now seen corresponding path program 3 times [2022-02-24 02:45:47,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:47,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891664584] [2022-02-24 02:45:47,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:47,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:47,424 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:47,424 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:47,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:47,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-24 02:45:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:47,956 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:47,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891664584] [2022-02-24 02:45:47,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [891664584] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:47,956 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:47,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 02:45:47,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242826818] [2022-02-24 02:45:47,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:47,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 02:45:47,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:47,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 02:45:47,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:45:47,957 INFO L87 Difference]: Start difference. First operand 177 states and 204 transitions. Second operand has 26 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:49,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:49,284 INFO L93 Difference]: Finished difference Result 193 states and 220 transitions. [2022-02-24 02:45:49,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 02:45:49,285 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-02-24 02:45:49,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:49,286 INFO L225 Difference]: With dead ends: 193 [2022-02-24 02:45:49,286 INFO L226 Difference]: Without dead ends: 153 [2022-02-24 02:45:49,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=485, Invalid=3055, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 02:45:49,287 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 135 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:49,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 89 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:45:49,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-02-24 02:45:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 128. [2022-02-24 02:45:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 119 states have internal predecessors, (140), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:45:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2022-02-24 02:45:49,349 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 50 [2022-02-24 02:45:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:49,349 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2022-02-24 02:45:49,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2022-02-24 02:45:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 02:45:49,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:49,350 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:49,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 02:45:49,350 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:49,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:49,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1165803103, now seen corresponding path program 7 times [2022-02-24 02:45:49,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:49,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081350815] [2022-02-24 02:45:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:49,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:49,352 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:49,352 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:49,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:49,498 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:49,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081350815] [2022-02-24 02:45:49,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1081350815] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:49,498 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:49,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:45:49,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661537584] [2022-02-24 02:45:49,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:49,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:45:49,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:49,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:45:49,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:45:49,499 INFO L87 Difference]: Start difference. First operand 128 states and 151 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2022-02-24 02:45:50,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:50,065 INFO L93 Difference]: Finished difference Result 274 states and 330 transitions. [2022-02-24 02:45:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:45:50,066 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 50 [2022-02-24 02:45:50,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:50,066 INFO L225 Difference]: With dead ends: 274 [2022-02-24 02:45:50,067 INFO L226 Difference]: Without dead ends: 235 [2022-02-24 02:45:50,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:45:50,067 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 308 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:50,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 81 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:50,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-02-24 02:45:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 197. [2022-02-24 02:45:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 186 states have (on average 1.1935483870967742) internal successors, (222), 188 states have internal predecessors, (222), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:45:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 233 transitions. [2022-02-24 02:45:50,170 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 233 transitions. Word has length 50 [2022-02-24 02:45:50,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:50,170 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 233 transitions. [2022-02-24 02:45:50,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2022-02-24 02:45:50,170 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 233 transitions. [2022-02-24 02:45:50,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 02:45:50,171 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:50,171 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:50,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 02:45:50,171 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:50,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:50,172 INFO L85 PathProgramCache]: Analyzing trace with hash 904028532, now seen corresponding path program 7 times [2022-02-24 02:45:50,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:50,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346045776] [2022-02-24 02:45:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:50,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:50,173 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:50,174 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:50,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:50,507 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:50,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346045776] [2022-02-24 02:45:50,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [346045776] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:50,508 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:50,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 02:45:50,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230667418] [2022-02-24 02:45:50,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:50,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 02:45:50,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:50,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 02:45:50,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:45:50,509 INFO L87 Difference]: Start difference. First operand 197 states and 233 transitions. Second operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2022-02-24 02:45:51,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:51,830 INFO L93 Difference]: Finished difference Result 323 states and 384 transitions. [2022-02-24 02:45:51,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 02:45:51,831 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 50 [2022-02-24 02:45:51,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:51,832 INFO L225 Difference]: With dead ends: 323 [2022-02-24 02:45:51,832 INFO L226 Difference]: Without dead ends: 274 [2022-02-24 02:45:51,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=829, Invalid=3331, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 02:45:51,834 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 164 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:51,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 86 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-02-24 02:45:51,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 189. [2022-02-24 02:45:51,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 178 states have (on average 1.1741573033707866) internal successors, (209), 180 states have internal predecessors, (209), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:45:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 220 transitions. [2022-02-24 02:45:51,955 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 220 transitions. Word has length 50 [2022-02-24 02:45:51,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:51,956 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 220 transitions. [2022-02-24 02:45:51,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2022-02-24 02:45:51,956 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 220 transitions. [2022-02-24 02:45:51,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 02:45:51,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:51,956 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:51,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 02:45:51,957 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:51,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:51,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1297158544, now seen corresponding path program 8 times [2022-02-24 02:45:51,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:51,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555181070] [2022-02-24 02:45:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:51,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:51,959 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:51,959 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:52,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:52,438 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:52,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555181070] [2022-02-24 02:45:52,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [555181070] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:52,438 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:52,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 02:45:52,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300030552] [2022-02-24 02:45:52,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:52,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 02:45:52,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:52,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 02:45:52,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:45:52,440 INFO L87 Difference]: Start difference. First operand 189 states and 220 transitions. Second operand has 22 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) [2022-02-24 02:45:53,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:53,397 INFO L93 Difference]: Finished difference Result 242 states and 281 transitions. [2022-02-24 02:45:53,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 02:45:53,397 INFO L78 Accepts]: Start accepts. Automaton has has 22 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 50 [2022-02-24 02:45:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:53,399 INFO L225 Difference]: With dead ends: 242 [2022-02-24 02:45:53,399 INFO L226 Difference]: Without dead ends: 240 [2022-02-24 02:45:53,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 02:45:53,400 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 121 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:53,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 92 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:53,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-24 02:45:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 189. [2022-02-24 02:45:53,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 178 states have (on average 1.1797752808988764) internal successors, (210), 180 states have internal predecessors, (210), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:45:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 221 transitions. [2022-02-24 02:45:53,505 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 221 transitions. Word has length 50 [2022-02-24 02:45:53,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:53,506 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 221 transitions. [2022-02-24 02:45:53,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 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) [2022-02-24 02:45:53,506 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 221 transitions. [2022-02-24 02:45:53,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 02:45:53,506 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:53,506 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:53,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 02:45:53,507 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:53,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:53,507 INFO L85 PathProgramCache]: Analyzing trace with hash -787548180, now seen corresponding path program 2 times [2022-02-24 02:45:53,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:53,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633145703] [2022-02-24 02:45:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:53,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:53,509 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:53,509 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:53,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:53,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-24 02:45:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:53,956 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:53,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633145703] [2022-02-24 02:45:53,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [633145703] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:53,957 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:53,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 02:45:53,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709740846] [2022-02-24 02:45:53,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:53,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 02:45:53,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:53,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 02:45:53,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:45:53,958 INFO L87 Difference]: Start difference. First operand 189 states and 221 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:55,992 INFO L93 Difference]: Finished difference Result 302 states and 358 transitions. [2022-02-24 02:45:55,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 02:45:55,993 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-24 02:45:55,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:55,994 INFO L225 Difference]: With dead ends: 302 [2022-02-24 02:45:55,994 INFO L226 Difference]: Without dead ends: 300 [2022-02-24 02:45:55,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=556, Invalid=3866, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 02:45:55,995 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 245 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:55,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 89 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:45:55,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-02-24 02:45:56,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 216. [2022-02-24 02:45:56,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 204 states have (on average 1.196078431372549) internal successors, (244), 207 states have internal predecessors, (244), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:56,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 257 transitions. [2022-02-24 02:45:56,141 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 257 transitions. Word has length 52 [2022-02-24 02:45:56,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:56,141 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 257 transitions. [2022-02-24 02:45:56,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:56,141 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 257 transitions. [2022-02-24 02:45:56,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 02:45:56,142 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:56,142 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:56,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 02:45:56,142 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:56,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:56,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1609585614, now seen corresponding path program 3 times [2022-02-24 02:45:56,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:56,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202498597] [2022-02-24 02:45:56,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:56,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:56,144 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:56,144 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:56,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:56,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-24 02:45:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:56,478 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:56,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202498597] [2022-02-24 02:45:56,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [202498597] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:56,479 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:56,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 02:45:56,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617664036] [2022-02-24 02:45:56,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:56,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 02:45:56,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:56,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 02:45:56,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:45:56,480 INFO L87 Difference]: Start difference. First operand 216 states and 257 transitions. Second operand has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:57,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:57,464 INFO L93 Difference]: Finished difference Result 253 states and 298 transitions. [2022-02-24 02:45:57,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 02:45:57,465 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-24 02:45:57,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:57,466 INFO L225 Difference]: With dead ends: 253 [2022-02-24 02:45:57,466 INFO L226 Difference]: Without dead ends: 251 [2022-02-24 02:45:57,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=1885, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 02:45:57,466 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 115 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:57,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 84 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:57,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-02-24 02:45:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 216. [2022-02-24 02:45:57,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 204 states have (on average 1.196078431372549) internal successors, (244), 207 states have internal predecessors, (244), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 257 transitions. [2022-02-24 02:45:57,595 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 257 transitions. Word has length 52 [2022-02-24 02:45:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:57,595 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 257 transitions. [2022-02-24 02:45:57,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:57,596 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 257 transitions. [2022-02-24 02:45:57,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 02:45:57,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:57,596 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:57,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 02:45:57,596 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:57,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:57,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1574158879, now seen corresponding path program 8 times [2022-02-24 02:45:57,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:57,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471586748] [2022-02-24 02:45:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:57,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:57,598 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:57,599 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:58,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:58,187 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:58,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471586748] [2022-02-24 02:45:58,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [471586748] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:58,187 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:58,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 02:45:58,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001884639] [2022-02-24 02:45:58,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:58,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 02:45:58,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:58,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 02:45:58,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:45:58,188 INFO L87 Difference]: Start difference. First operand 216 states and 257 transitions. Second operand has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2022-02-24 02:45:59,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:59,370 INFO L93 Difference]: Finished difference Result 366 states and 440 transitions. [2022-02-24 02:45:59,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 02:45:59,370 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 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 52 [2022-02-24 02:45:59,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:59,372 INFO L225 Difference]: With dead ends: 366 [2022-02-24 02:45:59,372 INFO L226 Difference]: Without dead ends: 364 [2022-02-24 02:45:59,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=2692, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 02:45:59,373 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 307 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:59,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 58 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:45:59,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-02-24 02:45:59,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 265. [2022-02-24 02:45:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 251 states have (on average 1.1952191235059761) internal successors, (300), 255 states have internal predecessors, (300), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:45:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 315 transitions. [2022-02-24 02:45:59,546 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 315 transitions. Word has length 52 [2022-02-24 02:45:59,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:59,546 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 315 transitions. [2022-02-24 02:45:59,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2022-02-24 02:45:59,546 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 315 transitions. [2022-02-24 02:45:59,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 02:45:59,547 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:59,547 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:59,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 02:45:59,547 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:59,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:59,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1534105639, now seen corresponding path program 9 times [2022-02-24 02:45:59,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:59,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624599335] [2022-02-24 02:45:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:59,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:59,549 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:59,549 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:00,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:00,108 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:00,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624599335] [2022-02-24 02:46:00,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [624599335] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:00,108 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:00,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 02:46:00,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122668528] [2022-02-24 02:46:00,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:00,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 02:46:00,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:00,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 02:46:00,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-02-24 02:46:00,110 INFO L87 Difference]: Start difference. First operand 265 states and 315 transitions. Second operand has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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) [2022-02-24 02:46:01,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:01,253 INFO L93 Difference]: Finished difference Result 377 states and 451 transitions. [2022-02-24 02:46:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 02:46:01,253 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 52 [2022-02-24 02:46:01,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:01,254 INFO L225 Difference]: With dead ends: 377 [2022-02-24 02:46:01,254 INFO L226 Difference]: Without dead ends: 375 [2022-02-24 02:46:01,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=458, Invalid=2622, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 02:46:01,255 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 277 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:01,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 58 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:01,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-02-24 02:46:01,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 268. [2022-02-24 02:46:01,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 254 states have (on average 1.1968503937007875) internal successors, (304), 258 states have internal predecessors, (304), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:46:01,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 319 transitions. [2022-02-24 02:46:01,423 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 319 transitions. Word has length 52 [2022-02-24 02:46:01,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:01,423 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 319 transitions. [2022-02-24 02:46:01,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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) [2022-02-24 02:46:01,423 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 319 transitions. [2022-02-24 02:46:01,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 02:46:01,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:01,424 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:01,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 02:46:01,424 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:01,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:01,424 INFO L85 PathProgramCache]: Analyzing trace with hash 650625165, now seen corresponding path program 4 times [2022-02-24 02:46:01,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:01,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824624599] [2022-02-24 02:46:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:01,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:01,426 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:01,427 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:01,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:01,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 02:46:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:01,600 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:01,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824624599] [2022-02-24 02:46:01,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [824624599] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:01,600 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:01,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:46:01,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943794385] [2022-02-24 02:46:01,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:01,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:46:01,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:01,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:46:01,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:46:01,601 INFO L87 Difference]: Start difference. First operand 268 states and 319 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:02,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:02,855 INFO L93 Difference]: Finished difference Result 369 states and 438 transitions. [2022-02-24 02:46:02,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 02:46:02,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-24 02:46:02,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:02,856 INFO L225 Difference]: With dead ends: 369 [2022-02-24 02:46:02,856 INFO L226 Difference]: Without dead ends: 367 [2022-02-24 02:46:02,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 02:46:02,857 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 146 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:02,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 118 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:46:02,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-02-24 02:46:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 271. [2022-02-24 02:46:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 257 states have (on average 1.198443579766537) internal successors, (308), 261 states have internal predecessors, (308), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:46:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 323 transitions. [2022-02-24 02:46:03,034 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 323 transitions. Word has length 55 [2022-02-24 02:46:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:03,034 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 323 transitions. [2022-02-24 02:46:03,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:03,035 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 323 transitions. [2022-02-24 02:46:03,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 02:46:03,035 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:03,035 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:03,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 02:46:03,036 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1236950663, now seen corresponding path program 5 times [2022-02-24 02:46:03,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:03,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205064048] [2022-02-24 02:46:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:03,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:03,038 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:03,038 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:03,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:03,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 02:46:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:03,213 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:03,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205064048] [2022-02-24 02:46:03,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1205064048] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:03,213 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:03,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:46:03,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422970198] [2022-02-24 02:46:03,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:03,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:46:03,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:03,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:46:03,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:46:03,215 INFO L87 Difference]: Start difference. First operand 271 states and 323 transitions. Second operand has 17 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:04,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:04,202 INFO L93 Difference]: Finished difference Result 361 states and 428 transitions. [2022-02-24 02:46:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 02:46:04,202 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-24 02:46:04,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:04,203 INFO L225 Difference]: With dead ends: 361 [2022-02-24 02:46:04,203 INFO L226 Difference]: Without dead ends: 359 [2022-02-24 02:46:04,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=1970, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 02:46:04,204 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 165 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:04,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 96 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:04,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-02-24 02:46:04,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 291. [2022-02-24 02:46:04,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 272 states have (on average 1.1875) internal successors, (323), 279 states have internal predecessors, (323), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-24 02:46:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 346 transitions. [2022-02-24 02:46:04,409 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 346 transitions. Word has length 55 [2022-02-24 02:46:04,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:04,409 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 346 transitions. [2022-02-24 02:46:04,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:04,409 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 346 transitions. [2022-02-24 02:46:04,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 02:46:04,410 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:04,410 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:04,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 02:46:04,410 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:04,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:04,410 INFO L85 PathProgramCache]: Analyzing trace with hash 555461839, now seen corresponding path program 4 times [2022-02-24 02:46:04,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:04,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299884359] [2022-02-24 02:46:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:04,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:04,412 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:04,412 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:05,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:05,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 02:46:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:05,032 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:05,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299884359] [2022-02-24 02:46:05,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1299884359] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:05,032 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:05,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:46:05,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264054924] [2022-02-24 02:46:05,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:05,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:46:05,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:05,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:46:05,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:46:05,034 INFO L87 Difference]: Start difference. First operand 291 states and 346 transitions. Second operand has 29 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:07,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:07,040 INFO L93 Difference]: Finished difference Result 360 states and 425 transitions. [2022-02-24 02:46:07,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 02:46:07,040 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-24 02:46:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:07,042 INFO L225 Difference]: With dead ends: 360 [2022-02-24 02:46:07,042 INFO L226 Difference]: Without dead ends: 358 [2022-02-24 02:46:07,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=602, Invalid=4510, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 02:46:07,042 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 153 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:07,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 106 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:46:07,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-02-24 02:46:07,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 318. [2022-02-24 02:46:07,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 299 states have (on average 1.1872909698996656) internal successors, (355), 306 states have internal predecessors, (355), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (11), 4 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-24 02:46:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 378 transitions. [2022-02-24 02:46:07,299 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 378 transitions. Word has length 55 [2022-02-24 02:46:07,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:07,299 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 378 transitions. [2022-02-24 02:46:07,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:07,299 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 378 transitions. [2022-02-24 02:46:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 02:46:07,300 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:07,300 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:07,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 02:46:07,300 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:07,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:07,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1147005369, now seen corresponding path program 5 times [2022-02-24 02:46:07,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:07,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811639142] [2022-02-24 02:46:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:07,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:07,303 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:07,303 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:07,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:07,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 02:46:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:07,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 02:46:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:07,607 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:07,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811639142] [2022-02-24 02:46:07,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [811639142] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:07,607 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:07,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:46:07,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195278676] [2022-02-24 02:46:07,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:07,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:46:07,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:07,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:46:07,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:46:07,608 INFO L87 Difference]: Start difference. First operand 318 states and 378 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:08,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:08,501 INFO L93 Difference]: Finished difference Result 384 states and 456 transitions. [2022-02-24 02:46:08,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 02:46:08,501 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-02-24 02:46:08,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:08,502 INFO L225 Difference]: With dead ends: 384 [2022-02-24 02:46:08,502 INFO L226 Difference]: Without dead ends: 382 [2022-02-24 02:46:08,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 02:46:08,503 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 146 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:08,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 72 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:46:08,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-02-24 02:46:08,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 368. [2022-02-24 02:46:08,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 340 states have (on average 1.1705882352941177) internal successors, (398), 351 states have internal predecessors, (398), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-24 02:46:08,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 437 transitions. [2022-02-24 02:46:08,835 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 437 transitions. Word has length 57 [2022-02-24 02:46:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:08,835 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 437 transitions. [2022-02-24 02:46:08,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 437 transitions. [2022-02-24 02:46:08,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 02:46:08,836 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:08,836 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:08,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 02:46:08,836 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:08,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:08,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1946369156, now seen corresponding path program 10 times [2022-02-24 02:46:08,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:08,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056170856] [2022-02-24 02:46:08,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:08,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:08,838 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:08,838 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:09,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:09,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:09,544 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:09,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056170856] [2022-02-24 02:46:09,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1056170856] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:09,545 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:09,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 02:46:09,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510441001] [2022-02-24 02:46:09,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:09,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 02:46:09,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:09,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 02:46:09,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-02-24 02:46:09,546 INFO L87 Difference]: Start difference. First operand 368 states and 437 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:11,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:11,433 INFO L93 Difference]: Finished difference Result 513 states and 616 transitions. [2022-02-24 02:46:11,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 02:46:11,434 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-24 02:46:11,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:11,435 INFO L225 Difference]: With dead ends: 513 [2022-02-24 02:46:11,436 INFO L226 Difference]: Without dead ends: 511 [2022-02-24 02:46:11,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=516, Invalid=3774, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 02:46:11,436 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 299 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:11,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 85 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:46:11,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-02-24 02:46:11,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 412. [2022-02-24 02:46:11,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 378 states have (on average 1.1719576719576719) internal successors, (443), 393 states have internal predecessors, (443), 24 states have call successors, (24), 10 states have call predecessors, (24), 9 states have return successors, (23), 8 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-24 02:46:11,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 490 transitions. [2022-02-24 02:46:11,782 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 490 transitions. Word has length 55 [2022-02-24 02:46:11,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:11,782 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 490 transitions. [2022-02-24 02:46:11,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:11,782 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 490 transitions. [2022-02-24 02:46:11,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 02:46:11,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:11,783 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:11,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 02:46:11,784 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:11,784 INFO L85 PathProgramCache]: Analyzing trace with hash -426979644, now seen corresponding path program 11 times [2022-02-24 02:46:11,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:11,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177829659] [2022-02-24 02:46:11,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:11,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:11,786 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:11,786 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:12,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:12,132 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:12,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177829659] [2022-02-24 02:46:12,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [177829659] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:12,132 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:12,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 02:46:12,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789543332] [2022-02-24 02:46:12,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:12,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 02:46:12,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:12,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 02:46:12,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:46:12,133 INFO L87 Difference]: Start difference. First operand 412 states and 490 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:13,601 INFO L93 Difference]: Finished difference Result 466 states and 554 transitions. [2022-02-24 02:46:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 02:46:13,601 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-24 02:46:13,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:13,602 INFO L225 Difference]: With dead ends: 466 [2022-02-24 02:46:13,603 INFO L226 Difference]: Without dead ends: 464 [2022-02-24 02:46:13,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=2632, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 02:46:13,603 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 200 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:13,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 75 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-02-24 02:46:13,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 426. [2022-02-24 02:46:13,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 390 states have (on average 1.1717948717948719) internal successors, (457), 406 states have internal predecessors, (457), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (24), 8 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-24 02:46:13,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 506 transitions. [2022-02-24 02:46:13,961 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 506 transitions. Word has length 55 [2022-02-24 02:46:13,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:13,962 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 506 transitions. [2022-02-24 02:46:13,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:13,962 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 506 transitions. [2022-02-24 02:46:13,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 02:46:13,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:13,963 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:13,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 02:46:13,963 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:13,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1046366456, now seen corresponding path program 12 times [2022-02-24 02:46:13,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:13,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033022663] [2022-02-24 02:46:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:13,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:13,965 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:13,966 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:14,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:14,522 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:14,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033022663] [2022-02-24 02:46:14,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1033022663] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:14,522 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:14,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 02:46:14,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970120073] [2022-02-24 02:46:14,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:14,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 02:46:14,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:14,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 02:46:14,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:46:14,523 INFO L87 Difference]: Start difference. First operand 426 states and 506 transitions. Second operand has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:16,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:16,043 INFO L93 Difference]: Finished difference Result 525 states and 626 transitions. [2022-02-24 02:46:16,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 02:46:16,043 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-24 02:46:16,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:16,045 INFO L225 Difference]: With dead ends: 525 [2022-02-24 02:46:16,045 INFO L226 Difference]: Without dead ends: 523 [2022-02-24 02:46:16,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=2666, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 02:46:16,046 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 220 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:16,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 85 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1460 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:46:16,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-02-24 02:46:16,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 445. [2022-02-24 02:46:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 407 states have (on average 1.1744471744471745) internal successors, (478), 424 states have internal predecessors, (478), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (25), 8 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-24 02:46:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 529 transitions. [2022-02-24 02:46:16,441 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 529 transitions. Word has length 55 [2022-02-24 02:46:16,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:16,441 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 529 transitions. [2022-02-24 02:46:16,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:16,442 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 529 transitions. [2022-02-24 02:46:16,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 02:46:16,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:16,443 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:16,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 02:46:16,443 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:16,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:16,443 INFO L85 PathProgramCache]: Analyzing trace with hash -140336322, now seen corresponding path program 13 times [2022-02-24 02:46:16,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:16,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361524802] [2022-02-24 02:46:16,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:16,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:16,445 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:16,446 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:17,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:17,127 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:17,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361524802] [2022-02-24 02:46:17,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [361524802] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:17,127 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:17,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:46:17,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192521073] [2022-02-24 02:46:17,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:17,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:46:17,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:17,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:46:17,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:46:17,128 INFO L87 Difference]: Start difference. First operand 445 states and 529 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:19,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:19,070 INFO L93 Difference]: Finished difference Result 560 states and 669 transitions. [2022-02-24 02:46:19,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 02:46:19,070 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-24 02:46:19,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:19,072 INFO L225 Difference]: With dead ends: 560 [2022-02-24 02:46:19,072 INFO L226 Difference]: Without dead ends: 558 [2022-02-24 02:46:19,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=516, Invalid=3644, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 02:46:19,073 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 226 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:19,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 103 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:46:19,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-02-24 02:46:19,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 467. [2022-02-24 02:46:19,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 426 states have (on average 1.1737089201877935) internal successors, (500), 445 states have internal predecessors, (500), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (27), 8 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-24 02:46:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 555 transitions. [2022-02-24 02:46:19,485 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 555 transitions. Word has length 55 [2022-02-24 02:46:19,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:19,485 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 555 transitions. [2022-02-24 02:46:19,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 555 transitions. [2022-02-24 02:46:19,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 02:46:19,487 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:19,487 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:19,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 02:46:19,487 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:19,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1524488624, now seen corresponding path program 9 times [2022-02-24 02:46:19,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:19,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602759] [2022-02-24 02:46:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:19,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:19,490 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:19,490 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:20,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:20,044 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:20,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602759] [2022-02-24 02:46:20,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1602759] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:20,044 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:20,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 02:46:20,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221805029] [2022-02-24 02:46:20,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:20,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 02:46:20,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:20,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 02:46:20,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:46:20,046 INFO L87 Difference]: Start difference. First operand 467 states and 555 transitions. Second operand has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:21,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:21,426 INFO L93 Difference]: Finished difference Result 547 states and 652 transitions. [2022-02-24 02:46:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 02:46:21,427 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-24 02:46:21,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:21,428 INFO L225 Difference]: With dead ends: 547 [2022-02-24 02:46:21,428 INFO L226 Difference]: Without dead ends: 545 [2022-02-24 02:46:21,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=352, Invalid=2000, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 02:46:21,429 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 124 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:21,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 89 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-02-24 02:46:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 473. [2022-02-24 02:46:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 433 states have (on average 1.1801385681293302) internal successors, (511), 451 states have internal predecessors, (511), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (26), 8 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-24 02:46:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 564 transitions. [2022-02-24 02:46:21,862 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 564 transitions. Word has length 55 [2022-02-24 02:46:21,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:21,862 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 564 transitions. [2022-02-24 02:46:21,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 564 transitions. [2022-02-24 02:46:21,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 02:46:21,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:21,868 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:21,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 02:46:21,868 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:21,868 INFO L85 PathProgramCache]: Analyzing trace with hash 337785846, now seen corresponding path program 10 times [2022-02-24 02:46:21,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:21,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634632619] [2022-02-24 02:46:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:21,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:21,871 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:21,871 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:22,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:22,366 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:22,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634632619] [2022-02-24 02:46:22,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1634632619] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:22,367 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:22,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 02:46:22,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65569626] [2022-02-24 02:46:22,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:22,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 02:46:22,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:22,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 02:46:22,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:46:22,368 INFO L87 Difference]: Start difference. First operand 473 states and 564 transitions. Second operand has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:23,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:23,731 INFO L93 Difference]: Finished difference Result 555 states and 662 transitions. [2022-02-24 02:46:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 02:46:23,732 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-24 02:46:23,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:23,734 INFO L225 Difference]: With dead ends: 555 [2022-02-24 02:46:23,734 INFO L226 Difference]: Without dead ends: 553 [2022-02-24 02:46:23,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=359, Invalid=2191, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 02:46:23,735 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 136 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:23,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 75 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-02-24 02:46:24,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 495. [2022-02-24 02:46:24,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 453 states have (on average 1.1810154525386314) internal successors, (535), 472 states have internal predecessors, (535), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (27), 8 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-24 02:46:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 590 transitions. [2022-02-24 02:46:24,151 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 590 transitions. Word has length 55 [2022-02-24 02:46:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:24,151 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 590 transitions. [2022-02-24 02:46:24,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:24,151 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 590 transitions. [2022-02-24 02:46:24,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 02:46:24,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:24,152 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:24,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 02:46:24,152 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:24,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:24,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1285024718, now seen corresponding path program 5 times [2022-02-24 02:46:24,153 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:24,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69304087] [2022-02-24 02:46:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:24,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:24,155 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:24,155 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:24,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:24,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-24 02:46:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:24,953 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:24,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69304087] [2022-02-24 02:46:24,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [69304087] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:24,953 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:24,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:46:24,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213950841] [2022-02-24 02:46:24,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:24,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:46:24,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:24,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:46:24,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:46:24,954 INFO L87 Difference]: Start difference. First operand 495 states and 590 transitions. Second operand has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:27,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:27,703 INFO L93 Difference]: Finished difference Result 613 states and 730 transitions. [2022-02-24 02:46:27,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-24 02:46:27,703 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-24 02:46:27,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:27,705 INFO L225 Difference]: With dead ends: 613 [2022-02-24 02:46:27,705 INFO L226 Difference]: Without dead ends: 611 [2022-02-24 02:46:27,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1035, Invalid=6621, Unknown=0, NotChecked=0, Total=7656 [2022-02-24 02:46:27,706 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 275 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:27,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 99 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1783 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:46:27,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-02-24 02:46:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 522. [2022-02-24 02:46:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 478 states have (on average 1.1778242677824269) internal successors, (563), 497 states have internal predecessors, (563), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (28), 9 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-24 02:46:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 620 transitions. [2022-02-24 02:46:28,166 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 620 transitions. Word has length 58 [2022-02-24 02:46:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:28,166 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 620 transitions. [2022-02-24 02:46:28,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:28,166 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 620 transitions. [2022-02-24 02:46:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 02:46:28,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:28,167 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:28,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 02:46:28,167 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1642798748, now seen corresponding path program 6 times [2022-02-24 02:46:28,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:28,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494793483] [2022-02-24 02:46:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:28,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:28,170 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:28,170 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:28,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:28,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-24 02:46:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:28,897 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:28,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494793483] [2022-02-24 02:46:28,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [494793483] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:28,897 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:28,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:46:28,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181144558] [2022-02-24 02:46:28,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:28,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:46:28,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:28,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:46:28,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:46:28,898 INFO L87 Difference]: Start difference. First operand 522 states and 620 transitions. Second operand has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:30,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:30,829 INFO L93 Difference]: Finished difference Result 552 states and 654 transitions. [2022-02-24 02:46:30,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 02:46:30,829 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-24 02:46:30,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:30,831 INFO L225 Difference]: With dead ends: 552 [2022-02-24 02:46:30,831 INFO L226 Difference]: Without dead ends: 550 [2022-02-24 02:46:30,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=465, Invalid=3441, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 02:46:30,832 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 126 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:30,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 98 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:46:30,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-02-24 02:46:31,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 485. [2022-02-24 02:46:31,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 443 states have (on average 1.18058690744921) internal successors, (523), 461 states have internal predecessors, (523), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (26), 8 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-24 02:46:31,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 576 transitions. [2022-02-24 02:46:31,233 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 576 transitions. Word has length 58 [2022-02-24 02:46:31,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:31,233 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 576 transitions. [2022-02-24 02:46:31,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:31,234 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 576 transitions. [2022-02-24 02:46:31,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 02:46:31,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:31,240 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:31,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 02:46:31,240 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:31,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:31,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1797092794, now seen corresponding path program 6 times [2022-02-24 02:46:31,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:31,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130850252] [2022-02-24 02:46:31,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:31,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:31,242 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:31,242 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:31,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:31,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-24 02:46:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:31,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-24 02:46:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:31,530 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:31,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130850252] [2022-02-24 02:46:31,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1130850252] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:31,531 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:31,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:46:31,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800671445] [2022-02-24 02:46:31,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:31,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:46:31,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:31,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:46:31,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:46:31,532 INFO L87 Difference]: Start difference. First operand 485 states and 576 transitions. Second operand has 19 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:32,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:32,646 INFO L93 Difference]: Finished difference Result 519 states and 616 transitions. [2022-02-24 02:46:32,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 02:46:32,647 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2022-02-24 02:46:32,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:32,648 INFO L225 Difference]: With dead ends: 519 [2022-02-24 02:46:32,648 INFO L226 Difference]: Without dead ends: 517 [2022-02-24 02:46:32,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 02:46:32,649 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 155 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:32,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 90 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-02-24 02:46:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 451. [2022-02-24 02:46:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 416 states have (on average 1.1899038461538463) internal successors, (495), 431 states have internal predecessors, (495), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 6 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 02:46:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 538 transitions. [2022-02-24 02:46:33,017 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 538 transitions. Word has length 60 [2022-02-24 02:46:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:33,017 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 538 transitions. [2022-02-24 02:46:33,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 538 transitions. [2022-02-24 02:46:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 02:46:33,018 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:33,018 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:33,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 02:46:33,018 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:33,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:33,019 INFO L85 PathProgramCache]: Analyzing trace with hash -141469330, now seen corresponding path program 14 times [2022-02-24 02:46:33,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:33,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879189757] [2022-02-24 02:46:33,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:33,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:33,022 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:33,023 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:33,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:33,224 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:33,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879189757] [2022-02-24 02:46:33,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1879189757] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:33,224 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:33,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:46:33,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963239515] [2022-02-24 02:46:33,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:33,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:46:33,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:33,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:46:33,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:46:33,225 INFO L87 Difference]: Start difference. First operand 451 states and 538 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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) [2022-02-24 02:46:34,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:34,599 INFO L93 Difference]: Finished difference Result 831 states and 1016 transitions. [2022-02-24 02:46:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 02:46:34,599 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 58 [2022-02-24 02:46:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:34,601 INFO L225 Difference]: With dead ends: 831 [2022-02-24 02:46:34,601 INFO L226 Difference]: Without dead ends: 744 [2022-02-24 02:46:34,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:46:34,602 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 610 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:34,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 96 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:34,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-02-24 02:46:35,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 638. [2022-02-24 02:46:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 603 states have (on average 1.2023217247097844) internal successors, (725), 618 states have internal predecessors, (725), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 6 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 02:46:35,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 768 transitions. [2022-02-24 02:46:35,139 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 768 transitions. Word has length 58 [2022-02-24 02:46:35,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:35,139 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 768 transitions. [2022-02-24 02:46:35,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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) [2022-02-24 02:46:35,139 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 768 transitions. [2022-02-24 02:46:35,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 02:46:35,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:35,140 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:35,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 02:46:35,140 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:35,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1104308479, now seen corresponding path program 15 times [2022-02-24 02:46:35,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:35,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064057485] [2022-02-24 02:46:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:35,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:35,143 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:35,143 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:35,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:35,407 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:35,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064057485] [2022-02-24 02:46:35,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1064057485] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:35,407 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:35,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 02:46:35,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774050281] [2022-02-24 02:46:35,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:35,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 02:46:35,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:35,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 02:46:35,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:46:35,408 INFO L87 Difference]: Start difference. First operand 638 states and 768 transitions. Second operand has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 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) [2022-02-24 02:46:37,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:37,532 INFO L93 Difference]: Finished difference Result 831 states and 1008 transitions. [2022-02-24 02:46:37,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-24 02:46:37,532 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 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 [2022-02-24 02:46:37,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:37,535 INFO L225 Difference]: With dead ends: 831 [2022-02-24 02:46:37,535 INFO L226 Difference]: Without dead ends: 829 [2022-02-24 02:46:37,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1477, Invalid=4685, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 02:46:37,536 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 275 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:37,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 73 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:37,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-02-24 02:46:38,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 657. [2022-02-24 02:46:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 622 states have (on average 1.2090032154340835) internal successors, (752), 637 states have internal predecessors, (752), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 6 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 02:46:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 795 transitions. [2022-02-24 02:46:38,085 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 795 transitions. Word has length 58 [2022-02-24 02:46:38,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:38,085 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 795 transitions. [2022-02-24 02:46:38,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 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) [2022-02-24 02:46:38,085 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 795 transitions. [2022-02-24 02:46:38,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 02:46:38,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:38,086 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:38,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 02:46:38,086 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:38,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:38,087 INFO L85 PathProgramCache]: Analyzing trace with hash -403243901, now seen corresponding path program 11 times [2022-02-24 02:46:38,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:38,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873485217] [2022-02-24 02:46:38,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:38,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:38,089 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:38,089 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:38,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:38,166 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:38,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873485217] [2022-02-24 02:46:38,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1873485217] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:38,167 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:38,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:46:38,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223305724] [2022-02-24 02:46:38,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:38,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:46:38,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:38,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:46:38,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:46:38,168 INFO L87 Difference]: Start difference. First operand 657 states and 795 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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) [2022-02-24 02:46:39,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:39,272 INFO L93 Difference]: Finished difference Result 817 states and 993 transitions. [2022-02-24 02:46:39,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 02:46:39,272 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 58 [2022-02-24 02:46:39,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:39,274 INFO L225 Difference]: With dead ends: 817 [2022-02-24 02:46:39,275 INFO L226 Difference]: Without dead ends: 787 [2022-02-24 02:46:39,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=349, Invalid=911, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:46:39,275 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 132 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:39,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 60 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:46:39,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-02-24 02:46:39,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 664. [2022-02-24 02:46:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 629 states have (on average 1.208267090620032) internal successors, (760), 644 states have internal predecessors, (760), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 6 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 02:46:39,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 803 transitions. [2022-02-24 02:46:39,847 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 803 transitions. Word has length 58 [2022-02-24 02:46:39,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:39,847 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 803 transitions. [2022-02-24 02:46:39,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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) [2022-02-24 02:46:39,848 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 803 transitions. [2022-02-24 02:46:39,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 02:46:39,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:39,849 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:39,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 02:46:39,849 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:39,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1786782527, now seen corresponding path program 16 times [2022-02-24 02:46:39,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:39,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321009591] [2022-02-24 02:46:39,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:39,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:39,851 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:39,851 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:40,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:40,370 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:40,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321009591] [2022-02-24 02:46:40,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [321009591] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:40,370 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:40,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 02:46:40,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990023307] [2022-02-24 02:46:40,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:40,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 02:46:40,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:40,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 02:46:40,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:46:40,371 INFO L87 Difference]: Start difference. First operand 664 states and 803 transitions. Second operand has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2022-02-24 02:46:42,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:42,174 INFO L93 Difference]: Finished difference Result 759 states and 915 transitions. [2022-02-24 02:46:42,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 02:46:42,175 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 58 [2022-02-24 02:46:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:42,177 INFO L225 Difference]: With dead ends: 759 [2022-02-24 02:46:42,177 INFO L226 Difference]: Without dead ends: 757 [2022-02-24 02:46:42,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=376, Invalid=2486, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 02:46:42,178 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 204 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:42,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 63 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:46:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-02-24 02:46:42,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 670. [2022-02-24 02:46:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 635 states have (on average 1.2094488188976378) internal successors, (768), 650 states have internal predecessors, (768), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 6 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 02:46:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 811 transitions. [2022-02-24 02:46:42,768 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 811 transitions. Word has length 58 [2022-02-24 02:46:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:42,768 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 811 transitions. [2022-02-24 02:46:42,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2022-02-24 02:46:42,768 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 811 transitions. [2022-02-24 02:46:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 02:46:42,769 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:42,769 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:42,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 02:46:42,769 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:42,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:42,769 INFO L85 PathProgramCache]: Analyzing trace with hash -266865911, now seen corresponding path program 12 times [2022-02-24 02:46:42,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:42,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78013152] [2022-02-24 02:46:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:42,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:42,774 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:42,774 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:43,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:43,259 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:43,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78013152] [2022-02-24 02:46:43,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [78013152] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:43,259 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:43,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 02:46:43,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467897591] [2022-02-24 02:46:43,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:43,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 02:46:43,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:43,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 02:46:43,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:46:43,260 INFO L87 Difference]: Start difference. First operand 670 states and 811 transitions. Second operand has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2022-02-24 02:46:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:46,154 INFO L93 Difference]: Finished difference Result 820 states and 990 transitions. [2022-02-24 02:46:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 02:46:46,155 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 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 58 [2022-02-24 02:46:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:46,157 INFO L225 Difference]: With dead ends: 820 [2022-02-24 02:46:46,157 INFO L226 Difference]: Without dead ends: 818 [2022-02-24 02:46:46,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=662, Invalid=4888, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 02:46:46,158 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 347 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2362 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 2362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:46,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 127 Invalid, 2610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 2362 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:46:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-02-24 02:46:46,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 657. [2022-02-24 02:46:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 619 states have (on average 1.2051696284329563) internal successors, (746), 636 states have internal predecessors, (746), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (23), 6 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-24 02:46:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 793 transitions. [2022-02-24 02:46:46,730 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 793 transitions. Word has length 58 [2022-02-24 02:46:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:46,731 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 793 transitions. [2022-02-24 02:46:46,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2022-02-24 02:46:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 793 transitions. [2022-02-24 02:46:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 02:46:46,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:46,732 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:46,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 02:46:46,732 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:46,732 INFO L85 PathProgramCache]: Analyzing trace with hash 396084749, now seen corresponding path program 17 times [2022-02-24 02:46:46,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:46,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916264456] [2022-02-24 02:46:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:46,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:46,734 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:46,734 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:47,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:47,236 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:47,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916264456] [2022-02-24 02:46:47,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [916264456] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:47,236 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:47,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 02:46:47,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488241929] [2022-02-24 02:46:47,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:47,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 02:46:47,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:47,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 02:46:47,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:46:47,237 INFO L87 Difference]: Start difference. First operand 657 states and 793 transitions. Second operand has 24 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) [2022-02-24 02:46:49,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:49,492 INFO L93 Difference]: Finished difference Result 801 states and 966 transitions. [2022-02-24 02:46:49,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 02:46:49,493 INFO L78 Accepts]: Start accepts. Automaton has has 24 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 [2022-02-24 02:46:49,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:49,495 INFO L225 Difference]: With dead ends: 801 [2022-02-24 02:46:49,495 INFO L226 Difference]: Without dead ends: 799 [2022-02-24 02:46:49,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=482, Invalid=3300, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 02:46:49,496 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 178 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:49,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 118 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:46:49,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-02-24 02:46:50,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 653. [2022-02-24 02:46:50,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 618 states have (on average 1.2103559870550162) internal successors, (748), 633 states have internal predecessors, (748), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 6 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 02:46:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 791 transitions. [2022-02-24 02:46:50,046 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 791 transitions. Word has length 58 [2022-02-24 02:46:50,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:50,047 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 791 transitions. [2022-02-24 02:46:50,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 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) [2022-02-24 02:46:50,047 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 791 transitions. [2022-02-24 02:46:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 02:46:50,048 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:50,048 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:50,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 02:46:50,048 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:50,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:50,048 INFO L85 PathProgramCache]: Analyzing trace with hash -441878337, now seen corresponding path program 13 times [2022-02-24 02:46:50,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:50,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213645557] [2022-02-24 02:46:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:50,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:50,050 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:50,050 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:50,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:50,647 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:50,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213645557] [2022-02-24 02:46:50,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1213645557] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:50,647 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:50,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 02:46:50,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133737409] [2022-02-24 02:46:50,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:50,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 02:46:50,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:50,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 02:46:50,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-02-24 02:46:50,648 INFO L87 Difference]: Start difference. First operand 653 states and 791 transitions. Second operand has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 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) [2022-02-24 02:46:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:52,510 INFO L93 Difference]: Finished difference Result 755 states and 913 transitions. [2022-02-24 02:46:52,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 02:46:52,511 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 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 [2022-02-24 02:46:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:52,513 INFO L225 Difference]: With dead ends: 755 [2022-02-24 02:46:52,513 INFO L226 Difference]: Without dead ends: 753 [2022-02-24 02:46:52,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=479, Invalid=2713, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 02:46:52,513 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 173 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:52,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 78 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:46:52,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-02-24 02:46:53,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 674. [2022-02-24 02:46:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 639 states have (on average 1.214397496087637) internal successors, (776), 654 states have internal predecessors, (776), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 6 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 02:46:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 819 transitions. [2022-02-24 02:46:53,132 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 819 transitions. Word has length 58 [2022-02-24 02:46:53,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:53,132 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 819 transitions. [2022-02-24 02:46:53,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 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) [2022-02-24 02:46:53,132 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 819 transitions. [2022-02-24 02:46:53,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 02:46:53,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:53,133 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:53,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 02:46:53,133 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:53,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:53,134 INFO L85 PathProgramCache]: Analyzing trace with hash 2022038101, now seen corresponding path program 14 times [2022-02-24 02:46:53,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:53,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194766844] [2022-02-24 02:46:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:53,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:53,136 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:53,136 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:53,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:53,640 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:53,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194766844] [2022-02-24 02:46:53,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1194766844] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:53,640 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:53,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 02:46:53,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838245809] [2022-02-24 02:46:53,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:53,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 02:46:53,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:53,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 02:46:53,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:46:53,641 INFO L87 Difference]: Start difference. First operand 674 states and 819 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2022-02-24 02:46:55,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:55,572 INFO L93 Difference]: Finished difference Result 822 states and 994 transitions. [2022-02-24 02:46:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 02:46:55,573 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 [2022-02-24 02:46:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:55,576 INFO L225 Difference]: With dead ends: 822 [2022-02-24 02:46:55,576 INFO L226 Difference]: Without dead ends: 820 [2022-02-24 02:46:55,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=425, Invalid=2997, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 02:46:55,576 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 184 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:55,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 75 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:46:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-02-24 02:46:56,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 640. [2022-02-24 02:46:56,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 610 states have (on average 1.219672131147541) internal successors, (744), 621 states have internal predecessors, (744), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 6 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 02:46:56,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 779 transitions. [2022-02-24 02:46:56,132 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 779 transitions. Word has length 58 [2022-02-24 02:46:56,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:56,132 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 779 transitions. [2022-02-24 02:46:56,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2022-02-24 02:46:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 779 transitions. [2022-02-24 02:46:56,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 02:46:56,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:56,134 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:56,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 02:46:56,134 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:56,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:56,134 INFO L85 PathProgramCache]: Analyzing trace with hash 117942087, now seen corresponding path program 7 times [2022-02-24 02:46:56,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:56,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890543112] [2022-02-24 02:46:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:56,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:56,136 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:56,136 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:56,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:56,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-24 02:46:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:56,580 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:56,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890543112] [2022-02-24 02:46:56,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1890543112] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:56,581 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:56,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 02:46:56,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963597487] [2022-02-24 02:46:56,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:56,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 02:46:56,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:56,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 02:46:56,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-02-24 02:46:56,582 INFO L87 Difference]: Start difference. First operand 640 states and 779 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:58,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:58,623 INFO L93 Difference]: Finished difference Result 716 states and 868 transitions. [2022-02-24 02:46:58,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 02:46:58,624 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-02-24 02:46:58,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:58,626 INFO L225 Difference]: With dead ends: 716 [2022-02-24 02:46:58,626 INFO L226 Difference]: Without dead ends: 714 [2022-02-24 02:46:58,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=416, Invalid=3366, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 02:46:58,627 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 185 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:58,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 127 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1864 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:46:58,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-02-24 02:46:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 580. [2022-02-24 02:46:59,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 556 states have (on average 1.224820143884892) internal successors, (681), 564 states have internal predecessors, (681), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-24 02:46:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 708 transitions. [2022-02-24 02:46:59,164 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 708 transitions. Word has length 60 [2022-02-24 02:46:59,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:59,164 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 708 transitions. [2022-02-24 02:46:59,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 708 transitions. [2022-02-24 02:46:59,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 02:46:59,165 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:59,165 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:59,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 02:46:59,165 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:59,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:59,165 INFO L85 PathProgramCache]: Analyzing trace with hash 470069801, now seen corresponding path program 7 times [2022-02-24 02:46:59,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:59,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029605760] [2022-02-24 02:46:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:59,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:59,168 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:59,168 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:59,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:59,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-24 02:46:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:59,940 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:59,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029605760] [2022-02-24 02:46:59,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1029605760] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:59,940 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:59,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 02:46:59,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848270610] [2022-02-24 02:46:59,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:59,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 02:46:59,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:59,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 02:46:59,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:46:59,941 INFO L87 Difference]: Start difference. First operand 580 states and 708 transitions. Second operand has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:47:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:02,457 INFO L93 Difference]: Finished difference Result 739 states and 895 transitions. [2022-02-24 02:47:02,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 02:47:02,457 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-24 02:47:02,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:02,459 INFO L225 Difference]: With dead ends: 739 [2022-02-24 02:47:02,459 INFO L226 Difference]: Without dead ends: 737 [2022-02-24 02:47:02,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=638, Invalid=5214, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 02:47:02,460 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 236 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1772 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:02,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 98 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1772 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:47:02,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-02-24 02:47:03,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 619. [2022-02-24 02:47:03,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 594 states have (on average 1.2222222222222223) internal successors, (726), 603 states have internal predecessors, (726), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (14), 5 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-24 02:47:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 755 transitions. [2022-02-24 02:47:03,037 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 755 transitions. Word has length 61 [2022-02-24 02:47:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:03,037 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 755 transitions. [2022-02-24 02:47:03,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:47:03,037 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 755 transitions. [2022-02-24 02:47:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 02:47:03,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:03,038 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:03,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 02:47:03,038 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:03,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:03,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1495534305, now seen corresponding path program 8 times [2022-02-24 02:47:03,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:03,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133620789] [2022-02-24 02:47:03,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:03,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:03,041 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:03,041 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:03,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:03,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-24 02:47:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:03,728 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:03,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133620789] [2022-02-24 02:47:03,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1133620789] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:03,728 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:03,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:47:03,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204811272] [2022-02-24 02:47:03,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:03,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:47:03,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:03,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:47:03,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:47:03,729 INFO L87 Difference]: Start difference. First operand 619 states and 755 transitions. Second operand has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:47:06,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:06,223 INFO L93 Difference]: Finished difference Result 785 states and 947 transitions. [2022-02-24 02:47:06,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 02:47:06,223 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-24 02:47:06,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:06,225 INFO L225 Difference]: With dead ends: 785 [2022-02-24 02:47:06,225 INFO L226 Difference]: Without dead ends: 783 [2022-02-24 02:47:06,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=594, Invalid=4808, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 02:47:06,226 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 166 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:06,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 114 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:47:06,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-02-24 02:47:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 610. [2022-02-24 02:47:06,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 585 states have (on average 1.2222222222222223) internal successors, (715), 594 states have internal predecessors, (715), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (14), 5 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-24 02:47:06,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 744 transitions. [2022-02-24 02:47:06,797 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 744 transitions. Word has length 61 [2022-02-24 02:47:06,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:06,797 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 744 transitions. [2022-02-24 02:47:06,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:47:06,797 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 744 transitions. [2022-02-24 02:47:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 02:47:06,798 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:06,798 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:06,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 02:47:06,798 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:06,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:06,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1930573552, now seen corresponding path program 18 times [2022-02-24 02:47:06,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:06,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277701855] [2022-02-24 02:47:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:06,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:06,801 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:06,801 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:07,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:07,512 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:07,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277701855] [2022-02-24 02:47:07,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1277701855] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:07,513 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:07,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 02:47:07,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678098422] [2022-02-24 02:47:07,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:07,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 02:47:07,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:07,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 02:47:07,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:47:07,514 INFO L87 Difference]: Start difference. First operand 610 states and 744 transitions. Second operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2022-02-24 02:47:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:10,169 INFO L93 Difference]: Finished difference Result 859 states and 1048 transitions. [2022-02-24 02:47:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 02:47:10,169 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 60 [2022-02-24 02:47:10,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:10,172 INFO L225 Difference]: With dead ends: 859 [2022-02-24 02:47:10,172 INFO L226 Difference]: Without dead ends: 857 [2022-02-24 02:47:10,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=722, Invalid=4390, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 02:47:10,173 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 550 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:10,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 86 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:47:10,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-02-24 02:47:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 629. [2022-02-24 02:47:10,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 604 states have (on average 1.2251655629139073) internal successors, (740), 613 states have internal predecessors, (740), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (14), 5 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-24 02:47:10,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 769 transitions. [2022-02-24 02:47:10,750 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 769 transitions. Word has length 60 [2022-02-24 02:47:10,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:10,750 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 769 transitions. [2022-02-24 02:47:10,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2022-02-24 02:47:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 769 transitions. [2022-02-24 02:47:10,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 02:47:10,751 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:10,751 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:10,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 02:47:10,751 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:10,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:10,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1750933991, now seen corresponding path program 8 times [2022-02-24 02:47:10,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:10,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628793556] [2022-02-24 02:47:10,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:10,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:10,754 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:10,754 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:11,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:11,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 02:47:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:11,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 02:47:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:11,242 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:11,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628793556] [2022-02-24 02:47:11,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [628793556] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:11,242 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:11,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 02:47:11,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831244963] [2022-02-24 02:47:11,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:11,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 02:47:11,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:11,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 02:47:11,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:47:11,243 INFO L87 Difference]: Start difference. First operand 629 states and 769 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:47:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:12,862 INFO L93 Difference]: Finished difference Result 705 states and 857 transitions. [2022-02-24 02:47:12,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 02:47:12,862 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 63 [2022-02-24 02:47:12,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:12,864 INFO L225 Difference]: With dead ends: 705 [2022-02-24 02:47:12,864 INFO L226 Difference]: Without dead ends: 703 [2022-02-24 02:47:12,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=306, Invalid=2450, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 02:47:12,865 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 162 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:12,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 67 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:47:12,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-02-24 02:47:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 671. [2022-02-24 02:47:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 642 states have (on average 1.222741433021807) internal successors, (785), 652 states have internal predecessors, (785), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 02:47:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 820 transitions. [2022-02-24 02:47:13,509 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 820 transitions. Word has length 63 [2022-02-24 02:47:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:13,510 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 820 transitions. [2022-02-24 02:47:13,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:47:13,510 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 820 transitions. [2022-02-24 02:47:13,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 02:47:13,511 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:13,511 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:13,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 02:47:13,511 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:13,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1632684826, now seen corresponding path program 15 times [2022-02-24 02:47:13,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:13,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136751139] [2022-02-24 02:47:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:13,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:13,514 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:13,514 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:13,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:13,830 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:13,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136751139] [2022-02-24 02:47:13,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2136751139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:13,830 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:13,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:47:13,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678270633] [2022-02-24 02:47:13,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:13,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:47:13,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:13,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:47:13,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:47:13,831 INFO L87 Difference]: Start difference. First operand 671 states and 820 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:16,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:16,106 INFO L93 Difference]: Finished difference Result 907 states and 1106 transitions. [2022-02-24 02:47:16,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-24 02:47:16,107 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-24 02:47:16,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:16,109 INFO L225 Difference]: With dead ends: 907 [2022-02-24 02:47:16,109 INFO L226 Difference]: Without dead ends: 855 [2022-02-24 02:47:16,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1188, Invalid=4362, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 02:47:16,110 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 286 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:16,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 73 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:47:16,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-02-24 02:47:16,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 673. [2022-02-24 02:47:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 645 states have (on average 1.22015503875969) internal successors, (787), 654 states have internal predecessors, (787), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-24 02:47:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 820 transitions. [2022-02-24 02:47:16,775 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 820 transitions. Word has length 61 [2022-02-24 02:47:16,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:16,776 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 820 transitions. [2022-02-24 02:47:16,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 820 transitions. [2022-02-24 02:47:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 02:47:16,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:16,777 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:16,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 02:47:16,777 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:16,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:16,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1542934108, now seen corresponding path program 19 times [2022-02-24 02:47:16,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:16,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212667274] [2022-02-24 02:47:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:16,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:16,780 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:16,780 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:17,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:17,532 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:17,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212667274] [2022-02-24 02:47:17,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1212667274] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:17,532 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:17,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:47:17,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523167971] [2022-02-24 02:47:17,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:17,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:47:17,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:17,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:47:17,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:47:17,533 INFO L87 Difference]: Start difference. First operand 673 states and 820 transitions. Second operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:20,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:20,030 INFO L93 Difference]: Finished difference Result 796 states and 964 transitions. [2022-02-24 02:47:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 02:47:20,030 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-24 02:47:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:20,033 INFO L225 Difference]: With dead ends: 796 [2022-02-24 02:47:20,033 INFO L226 Difference]: Without dead ends: 794 [2022-02-24 02:47:20,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=481, Invalid=4075, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 02:47:20,034 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 198 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 2685 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:20,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 144 Invalid, 2805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2685 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:47:20,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-02-24 02:47:20,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 698. [2022-02-24 02:47:20,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 668 states have (on average 1.220059880239521) internal successors, (815), 678 states have internal predecessors, (815), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 02:47:20,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 850 transitions. [2022-02-24 02:47:20,792 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 850 transitions. Word has length 61 [2022-02-24 02:47:20,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:20,792 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 850 transitions. [2022-02-24 02:47:20,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:20,792 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 850 transitions. [2022-02-24 02:47:20,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 02:47:20,793 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:20,794 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:20,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 02:47:20,794 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:20,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:20,794 INFO L85 PathProgramCache]: Analyzing trace with hash 747738716, now seen corresponding path program 16 times [2022-02-24 02:47:20,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:20,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172379603] [2022-02-24 02:47:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:20,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:20,797 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:20,798 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:21,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:21,335 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:21,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172379603] [2022-02-24 02:47:21,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [172379603] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:21,335 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:21,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 02:47:21,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587077557] [2022-02-24 02:47:21,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:21,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 02:47:21,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:21,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 02:47:21,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:47:21,336 INFO L87 Difference]: Start difference. First operand 698 states and 850 transitions. Second operand has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:23,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:23,535 INFO L93 Difference]: Finished difference Result 802 states and 973 transitions. [2022-02-24 02:47:23,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 02:47:23,535 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-24 02:47:23,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:23,537 INFO L225 Difference]: With dead ends: 802 [2022-02-24 02:47:23,538 INFO L226 Difference]: Without dead ends: 800 [2022-02-24 02:47:23,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=374, Invalid=2818, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 02:47:23,538 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 196 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:23,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 92 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:47:23,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-02-24 02:47:24,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 710. [2022-02-24 02:47:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 680 states have (on average 1.2220588235294119) internal successors, (831), 690 states have internal predecessors, (831), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 02:47:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 866 transitions. [2022-02-24 02:47:24,292 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 866 transitions. Word has length 61 [2022-02-24 02:47:24,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:24,292 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 866 transitions. [2022-02-24 02:47:24,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 866 transitions. [2022-02-24 02:47:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 02:47:24,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:24,294 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:24,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 02:47:24,294 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:24,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:24,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1042853094, now seen corresponding path program 17 times [2022-02-24 02:47:24,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:24,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401923420] [2022-02-24 02:47:24,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:24,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:24,296 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:24,296 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:24,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:24,897 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:24,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401923420] [2022-02-24 02:47:24,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [401923420] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:24,897 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:24,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 02:47:24,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490665905] [2022-02-24 02:47:24,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:24,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 02:47:24,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:24,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 02:47:24,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:47:24,898 INFO L87 Difference]: Start difference. First operand 710 states and 866 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:27,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:27,439 INFO L93 Difference]: Finished difference Result 846 states and 1026 transitions. [2022-02-24 02:47:27,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 02:47:27,439 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-24 02:47:27,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:27,442 INFO L225 Difference]: With dead ends: 846 [2022-02-24 02:47:27,442 INFO L226 Difference]: Without dead ends: 844 [2022-02-24 02:47:27,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=486, Invalid=3674, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 02:47:27,442 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 183 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:27,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 75 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:47:27,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-02-24 02:47:28,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 692. [2022-02-24 02:47:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 662 states have (on average 1.2190332326283988) internal successors, (807), 672 states have internal predecessors, (807), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 02:47:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 842 transitions. [2022-02-24 02:47:28,134 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 842 transitions. Word has length 61 [2022-02-24 02:47:28,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:28,134 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 842 transitions. [2022-02-24 02:47:28,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 842 transitions. [2022-02-24 02:47:28,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 02:47:28,136 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:28,136 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:28,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 02:47:28,136 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:28,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:28,136 INFO L85 PathProgramCache]: Analyzing trace with hash -171237983, now seen corresponding path program 6 times [2022-02-24 02:47:28,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:28,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442253959] [2022-02-24 02:47:28,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:28,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:28,139 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:28,139 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:28,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:28,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 02:47:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:28,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 02:47:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:28,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 02:47:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:28,275 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:28,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442253959] [2022-02-24 02:47:28,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [442253959] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:28,275 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:28,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:47:28,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829652561] [2022-02-24 02:47:28,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:28,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:47:28,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:28,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:47:28,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:47:28,276 INFO L87 Difference]: Start difference. First operand 692 states and 842 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:47:29,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:29,461 INFO L93 Difference]: Finished difference Result 729 states and 885 transitions. [2022-02-24 02:47:29,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:47:29,461 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 65 [2022-02-24 02:47:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:29,463 INFO L225 Difference]: With dead ends: 729 [2022-02-24 02:47:29,463 INFO L226 Difference]: Without dead ends: 674 [2022-02-24 02:47:29,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:47:29,463 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 159 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:29,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 85 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:29,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-02-24 02:47:30,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 639. [2022-02-24 02:47:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 614 states have (on average 1.1872964169381108) internal successors, (729), 622 states have internal predecessors, (729), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 7 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-24 02:47:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 759 transitions. [2022-02-24 02:47:30,102 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 759 transitions. Word has length 65 [2022-02-24 02:47:30,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:30,102 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 759 transitions. [2022-02-24 02:47:30,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:47:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 759 transitions. [2022-02-24 02:47:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 02:47:30,103 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:30,104 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:30,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 02:47:30,104 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:30,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:30,104 INFO L85 PathProgramCache]: Analyzing trace with hash 972338910, now seen corresponding path program 9 times [2022-02-24 02:47:30,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:30,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717210388] [2022-02-24 02:47:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:30,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:30,107 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:30,107 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:30,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:30,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 02:47:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:30,329 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:30,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717210388] [2022-02-24 02:47:30,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [717210388] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:30,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:30,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 02:47:30,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816897392] [2022-02-24 02:47:30,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:30,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 02:47:30,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:30,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 02:47:30,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:47:30,330 INFO L87 Difference]: Start difference. First operand 639 states and 759 transitions. Second operand has 20 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:47:32,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:32,761 INFO L93 Difference]: Finished difference Result 867 states and 1035 transitions. [2022-02-24 02:47:32,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 02:47:32,761 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-24 02:47:32,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:32,764 INFO L225 Difference]: With dead ends: 867 [2022-02-24 02:47:32,764 INFO L226 Difference]: Without dead ends: 865 [2022-02-24 02:47:32,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 02:47:32,765 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 251 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:32,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 119 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1776 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:47:32,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-02-24 02:47:33,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 695. [2022-02-24 02:47:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 664 states have (on average 1.1852409638554218) internal successors, (787), 676 states have internal predecessors, (787), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (19), 8 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-24 02:47:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 827 transitions. [2022-02-24 02:47:33,526 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 827 transitions. Word has length 63 [2022-02-24 02:47:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:33,526 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 827 transitions. [2022-02-24 02:47:33,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:47:33,526 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 827 transitions. [2022-02-24 02:47:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 02:47:33,527 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:33,527 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:33,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 02:47:33,528 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:33,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:33,528 INFO L85 PathProgramCache]: Analyzing trace with hash 736626974, now seen corresponding path program 10 times [2022-02-24 02:47:33,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:33,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458509157] [2022-02-24 02:47:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:33,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:33,530 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:33,530 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:33,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:33,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 02:47:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:33,952 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:33,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458509157] [2022-02-24 02:47:33,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [458509157] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:33,952 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:33,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:47:33,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847077865] [2022-02-24 02:47:33,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:33,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:47:33,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:47:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:47:33,953 INFO L87 Difference]: Start difference. First operand 695 states and 827 transitions. Second operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:47:36,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:36,246 INFO L93 Difference]: Finished difference Result 756 states and 897 transitions. [2022-02-24 02:47:36,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 02:47:36,247 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-24 02:47:36,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:36,249 INFO L225 Difference]: With dead ends: 756 [2022-02-24 02:47:36,249 INFO L226 Difference]: Without dead ends: 754 [2022-02-24 02:47:36,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=531, Invalid=3891, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 02:47:36,250 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 274 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:36,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 109 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:47:36,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-02-24 02:47:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 718. [2022-02-24 02:47:37,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 685 states have (on average 1.1854014598540146) internal successors, (812), 697 states have internal predecessors, (812), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (20), 9 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-24 02:47:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 854 transitions. [2022-02-24 02:47:37,066 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 854 transitions. Word has length 63 [2022-02-24 02:47:37,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:37,066 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 854 transitions. [2022-02-24 02:47:37,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:47:37,066 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 854 transitions. [2022-02-24 02:47:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 02:47:37,067 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:37,068 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:37,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 02:47:37,068 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:37,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:37,068 INFO L85 PathProgramCache]: Analyzing trace with hash -578416814, now seen corresponding path program 11 times [2022-02-24 02:47:37,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:37,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494127284] [2022-02-24 02:47:37,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:37,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:37,071 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:37,071 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:37,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:37,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 02:47:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:37,621 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:37,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494127284] [2022-02-24 02:47:37,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [494127284] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:37,621 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:37,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:47:37,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266627485] [2022-02-24 02:47:37,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:37,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:47:37,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:37,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:47:37,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:47:37,622 INFO L87 Difference]: Start difference. First operand 718 states and 854 transitions. Second operand has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:47:40,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:40,106 INFO L93 Difference]: Finished difference Result 773 states and 917 transitions. [2022-02-24 02:47:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 02:47:40,107 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-24 02:47:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:40,109 INFO L225 Difference]: With dead ends: 773 [2022-02-24 02:47:40,109 INFO L226 Difference]: Without dead ends: 771 [2022-02-24 02:47:40,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=498, Invalid=4058, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 02:47:40,110 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 189 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 2291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:40,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 130 Invalid, 2291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2181 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:47:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-02-24 02:47:40,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 700. [2022-02-24 02:47:40,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 668 states have (on average 1.18562874251497) internal successors, (792), 679 states have internal predecessors, (792), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 9 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-24 02:47:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 832 transitions. [2022-02-24 02:47:40,887 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 832 transitions. Word has length 63 [2022-02-24 02:47:40,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:40,887 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 832 transitions. [2022-02-24 02:47:40,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:47:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 832 transitions. [2022-02-24 02:47:40,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 02:47:40,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:40,888 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:40,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 02:47:40,888 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:40,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:40,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1107936288, now seen corresponding path program 9 times [2022-02-24 02:47:40,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:40,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065032763] [2022-02-24 02:47:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:40,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:40,891 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:40,891 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:41,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:41,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 02:47:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:41,644 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:41,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065032763] [2022-02-24 02:47:41,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2065032763] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:41,644 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:41,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 02:47:41,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495477618] [2022-02-24 02:47:41,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:41,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 02:47:41,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:41,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 02:47:41,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:47:41,645 INFO L87 Difference]: Start difference. First operand 700 states and 832 transitions. Second operand has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:47:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:44,604 INFO L93 Difference]: Finished difference Result 843 states and 999 transitions. [2022-02-24 02:47:44,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 02:47:44,604 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-24 02:47:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:44,606 INFO L225 Difference]: With dead ends: 843 [2022-02-24 02:47:44,606 INFO L226 Difference]: Without dead ends: 841 [2022-02-24 02:47:44,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=732, Invalid=5430, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 02:47:44,607 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 151 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:44,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 121 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:47:44,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-02-24 02:47:45,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 739. [2022-02-24 02:47:45,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 707 states have (on average 1.1867043847241867) internal successors, (839), 718 states have internal predecessors, (839), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 9 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-24 02:47:45,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 879 transitions. [2022-02-24 02:47:45,444 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 879 transitions. Word has length 63 [2022-02-24 02:47:45,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:45,444 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 879 transitions. [2022-02-24 02:47:45,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:47:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 879 transitions. [2022-02-24 02:47:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 02:47:45,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:45,445 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:45,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 02:47:45,446 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:45,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:45,446 INFO L85 PathProgramCache]: Analyzing trace with hash -645721556, now seen corresponding path program 10 times [2022-02-24 02:47:45,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:45,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197516954] [2022-02-24 02:47:45,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:45,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:45,449 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:45,449 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:46,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:46,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-24 02:47:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:46,245 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:46,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197516954] [2022-02-24 02:47:46,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [197516954] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:46,245 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:46,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 02:47:46,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855130709] [2022-02-24 02:47:46,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:46,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 02:47:46,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:46,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 02:47:46,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:47:46,246 INFO L87 Difference]: Start difference. First operand 739 states and 879 transitions. Second operand has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:47:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:48,785 INFO L93 Difference]: Finished difference Result 783 states and 928 transitions. [2022-02-24 02:47:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-24 02:47:48,785 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-24 02:47:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:48,787 INFO L225 Difference]: With dead ends: 783 [2022-02-24 02:47:48,787 INFO L226 Difference]: Without dead ends: 781 [2022-02-24 02:47:48,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1618 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=613, Invalid=4937, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 02:47:48,788 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 174 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:48,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 107 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:47:48,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-02-24 02:47:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 735. [2022-02-24 02:47:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 704 states have (on average 1.1875) internal successors, (836), 715 states have internal predecessors, (836), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 8 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-24 02:47:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 874 transitions. [2022-02-24 02:47:49,576 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 874 transitions. Word has length 64 [2022-02-24 02:47:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:49,577 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 874 transitions. [2022-02-24 02:47:49,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:47:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 874 transitions. [2022-02-24 02:47:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 02:47:49,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:49,578 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:49,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 02:47:49,578 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:49,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:49,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1217741736, now seen corresponding path program 7 times [2022-02-24 02:47:49,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:49,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341887311] [2022-02-24 02:47:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:49,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:49,581 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:49,581 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:49,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:49,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 02:47:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:49,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 02:47:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:49,951 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:49,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341887311] [2022-02-24 02:47:49,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [341887311] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:49,951 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:49,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:47:49,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17080582] [2022-02-24 02:47:49,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:49,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:47:49,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:49,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:47:49,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:47:49,952 INFO L87 Difference]: Start difference. First operand 735 states and 874 transitions. Second operand has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:47:51,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:51,830 INFO L93 Difference]: Finished difference Result 843 states and 1006 transitions. [2022-02-24 02:47:51,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 02:47:51,830 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 65 [2022-02-24 02:47:51,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:51,831 INFO L225 Difference]: With dead ends: 843 [2022-02-24 02:47:51,831 INFO L226 Difference]: Without dead ends: 841 [2022-02-24 02:47:51,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 02:47:51,832 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 269 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:51,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 74 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:47:51,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-02-24 02:47:52,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 810. [2022-02-24 02:47:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 769 states have (on average 1.1833550065019507) internal successors, (910), 786 states have internal predecessors, (910), 29 states have call successors, (29), 12 states have call predecessors, (29), 11 states have return successors, (27), 11 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-24 02:47:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 966 transitions. [2022-02-24 02:47:52,804 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 966 transitions. Word has length 65 [2022-02-24 02:47:52,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:52,804 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 966 transitions. [2022-02-24 02:47:52,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:47:52,805 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 966 transitions. [2022-02-24 02:47:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 02:47:52,806 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:52,806 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:52,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 02:47:52,806 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:52,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:52,806 INFO L85 PathProgramCache]: Analyzing trace with hash 775255317, now seen corresponding path program 20 times [2022-02-24 02:47:52,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:52,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121129367] [2022-02-24 02:47:52,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:52,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:52,809 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:52,809 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:53,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:53,713 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:53,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121129367] [2022-02-24 02:47:53,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [121129367] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:53,713 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:53,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 02:47:53,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162007099] [2022-02-24 02:47:53,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:53,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 02:47:53,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:53,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 02:47:53,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:47:53,714 INFO L87 Difference]: Start difference. First operand 810 states and 966 transitions. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:57,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:57,062 INFO L93 Difference]: Finished difference Result 1093 states and 1312 transitions. [2022-02-24 02:47:57,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 02:47:57,063 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-24 02:47:57,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:57,065 INFO L225 Difference]: With dead ends: 1093 [2022-02-24 02:47:57,065 INFO L226 Difference]: Without dead ends: 1091 [2022-02-24 02:47:57,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=602, Invalid=4948, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 02:47:57,066 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 382 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2242 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 2242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:57,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 104 Invalid, 2453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 2242 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:47:57,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2022-02-24 02:47:58,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 869. [2022-02-24 02:47:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 825 states have (on average 1.187878787878788) internal successors, (980), 844 states have internal predecessors, (980), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (29), 11 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-24 02:47:58,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1040 transitions. [2022-02-24 02:47:58,086 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1040 transitions. Word has length 63 [2022-02-24 02:47:58,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:58,087 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1040 transitions. [2022-02-24 02:47:58,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:58,087 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1040 transitions. [2022-02-24 02:47:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 02:47:58,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:58,088 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:58,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 02:47:58,088 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:58,089 INFO L85 PathProgramCache]: Analyzing trace with hash 78615171, now seen corresponding path program 21 times [2022-02-24 02:47:58,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:58,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484396180] [2022-02-24 02:47:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:58,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:58,092 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:58,092 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:58,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:58,745 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:58,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484396180] [2022-02-24 02:47:58,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1484396180] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:58,745 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:58,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 02:47:58,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119087235] [2022-02-24 02:47:58,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:58,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 02:47:58,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:58,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 02:47:58,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:47:58,746 INFO L87 Difference]: Start difference. First operand 869 states and 1040 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:03,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:03,045 INFO L93 Difference]: Finished difference Result 1197 states and 1447 transitions. [2022-02-24 02:48:03,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 02:48:03,046 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-24 02:48:03,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:03,048 INFO L225 Difference]: With dead ends: 1197 [2022-02-24 02:48:03,048 INFO L226 Difference]: Without dead ends: 1195 [2022-02-24 02:48:03,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=877, Invalid=5129, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 02:48:03,049 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 574 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:03,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 82 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:48:03,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-02-24 02:48:04,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 916. [2022-02-24 02:48:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 867 states have (on average 1.1880046136101499) internal successors, (1030), 889 states have internal predecessors, (1030), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (32), 11 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-24 02:48:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1096 transitions. [2022-02-24 02:48:04,242 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1096 transitions. Word has length 63 [2022-02-24 02:48:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:04,242 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1096 transitions. [2022-02-24 02:48:04,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:04,242 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1096 transitions. [2022-02-24 02:48:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:48:04,244 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:04,244 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:04,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 02:48:04,244 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:04,244 INFO L85 PathProgramCache]: Analyzing trace with hash -500007896, now seen corresponding path program 11 times [2022-02-24 02:48:04,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:04,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332003893] [2022-02-24 02:48:04,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:04,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:04,247 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:04,247 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:04,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:04,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-24 02:48:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:04,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 02:48:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:04,917 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:04,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332003893] [2022-02-24 02:48:04,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1332003893] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:04,917 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:04,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:48:04,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52425303] [2022-02-24 02:48:04,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:04,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:48:04,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:04,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:48:04,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:48:04,918 INFO L87 Difference]: Start difference. First operand 916 states and 1096 transitions. Second operand has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:48:08,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:08,090 INFO L93 Difference]: Finished difference Result 967 states and 1154 transitions. [2022-02-24 02:48:08,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 02:48:08,090 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 66 [2022-02-24 02:48:08,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:08,092 INFO L225 Difference]: With dead ends: 967 [2022-02-24 02:48:08,092 INFO L226 Difference]: Without dead ends: 907 [2022-02-24 02:48:08,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=679, Invalid=5173, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 02:48:08,093 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 164 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:08,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 121 Invalid, 2217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2033 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:48:08,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-02-24 02:48:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 809. [2022-02-24 02:48:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 767 states have (on average 1.1890482398956974) internal successors, (912), 784 states have internal predecessors, (912), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 10 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-24 02:48:09,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 966 transitions. [2022-02-24 02:48:09,086 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 966 transitions. Word has length 66 [2022-02-24 02:48:09,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:09,086 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 966 transitions. [2022-02-24 02:48:09,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:48:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 966 transitions. [2022-02-24 02:48:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:48:09,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:09,087 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:09,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 02:48:09,087 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:09,088 INFO L85 PathProgramCache]: Analyzing trace with hash -683336596, now seen corresponding path program 12 times [2022-02-24 02:48:09,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:09,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643722554] [2022-02-24 02:48:09,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:09,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:09,090 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:09,090 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-24 02:48:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 02:48:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:09,706 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:09,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643722554] [2022-02-24 02:48:09,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1643722554] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:09,706 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:09,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 02:48:09,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987677082] [2022-02-24 02:48:09,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:09,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 02:48:09,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:09,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 02:48:09,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:48:09,707 INFO L87 Difference]: Start difference. First operand 809 states and 966 transitions. Second operand has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:48:11,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:11,827 INFO L93 Difference]: Finished difference Result 843 states and 1005 transitions. [2022-02-24 02:48:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 02:48:11,828 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 66 [2022-02-24 02:48:11,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:11,829 INFO L225 Difference]: With dead ends: 843 [2022-02-24 02:48:11,830 INFO L226 Difference]: Without dead ends: 823 [2022-02-24 02:48:11,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=328, Invalid=2642, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 02:48:11,830 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 134 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:11,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 116 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:48:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-02-24 02:48:12,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 809. [2022-02-24 02:48:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 767 states have (on average 1.1877444589308996) internal successors, (911), 784 states have internal predecessors, (911), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 10 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-24 02:48:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 965 transitions. [2022-02-24 02:48:12,874 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 965 transitions. Word has length 66 [2022-02-24 02:48:12,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:12,874 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 965 transitions. [2022-02-24 02:48:12,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:48:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 965 transitions. [2022-02-24 02:48:12,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 02:48:12,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:12,875 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:12,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 02:48:12,875 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:12,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:12,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1145647575, now seen corresponding path program 18 times [2022-02-24 02:48:12,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:12,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743263365] [2022-02-24 02:48:12,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:12,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:12,878 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:12,878 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:13,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:13,395 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:13,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743263365] [2022-02-24 02:48:13,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1743263365] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:13,395 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:13,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 02:48:13,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263486196] [2022-02-24 02:48:13,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:13,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 02:48:13,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:13,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 02:48:13,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:48:13,396 INFO L87 Difference]: Start difference. First operand 809 states and 965 transitions. Second operand has 26 states, 25 states have (on average 2.4) internal successors, (60), 24 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) [2022-02-24 02:48:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:16,047 INFO L93 Difference]: Finished difference Result 889 states and 1056 transitions. [2022-02-24 02:48:16,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 02:48:16,047 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 24 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 64 [2022-02-24 02:48:16,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:16,049 INFO L225 Difference]: With dead ends: 889 [2022-02-24 02:48:16,049 INFO L226 Difference]: Without dead ends: 887 [2022-02-24 02:48:16,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=437, Invalid=3469, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 02:48:16,050 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 219 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:16,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 118 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1968 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:48:16,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-02-24 02:48:17,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 819. [2022-02-24 02:48:17,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 776 states have (on average 1.1868556701030928) internal successors, (921), 793 states have internal predecessors, (921), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (26), 10 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-24 02:48:17,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 975 transitions. [2022-02-24 02:48:17,069 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 975 transitions. Word has length 64 [2022-02-24 02:48:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:17,070 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 975 transitions. [2022-02-24 02:48:17,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 24 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) [2022-02-24 02:48:17,070 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 975 transitions. [2022-02-24 02:48:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 02:48:17,071 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:17,071 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:17,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 02:48:17,071 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:17,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:17,071 INFO L85 PathProgramCache]: Analyzing trace with hash -571362225, now seen corresponding path program 8 times [2022-02-24 02:48:17,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:17,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221723172] [2022-02-24 02:48:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:17,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:17,074 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:17,074 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:17,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:17,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 02:48:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:17,385 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:17,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221723172] [2022-02-24 02:48:17,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [221723172] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:17,386 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:17,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 02:48:17,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055869270] [2022-02-24 02:48:17,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:17,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 02:48:17,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:17,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 02:48:17,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:48:17,387 INFO L87 Difference]: Start difference. First operand 819 states and 975 transitions. Second operand has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:48:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:19,285 INFO L93 Difference]: Finished difference Result 867 states and 1031 transitions. [2022-02-24 02:48:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 02:48:19,286 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2022-02-24 02:48:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:19,287 INFO L225 Difference]: With dead ends: 867 [2022-02-24 02:48:19,287 INFO L226 Difference]: Without dead ends: 865 [2022-02-24 02:48:19,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 02:48:19,288 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 118 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:19,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 92 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:48:19,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-02-24 02:48:20,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 823. [2022-02-24 02:48:20,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 780 states have (on average 1.1884615384615385) internal successors, (927), 796 states have internal predecessors, (927), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (26), 11 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-24 02:48:20,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 981 transitions. [2022-02-24 02:48:20,332 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 981 transitions. Word has length 65 [2022-02-24 02:48:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:20,332 INFO L470 AbstractCegarLoop]: Abstraction has 823 states and 981 transitions. [2022-02-24 02:48:20,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:48:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 981 transitions. [2022-02-24 02:48:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:48:20,333 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:20,334 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:20,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 02:48:20,334 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:20,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:20,334 INFO L85 PathProgramCache]: Analyzing trace with hash 781141083, now seen corresponding path program 13 times [2022-02-24 02:48:20,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:20,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784540026] [2022-02-24 02:48:20,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:20,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:20,336 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:20,337 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:20,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:20,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 02:48:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:20,724 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:20,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784540026] [2022-02-24 02:48:20,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1784540026] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:20,724 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:20,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 02:48:20,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57774401] [2022-02-24 02:48:20,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:20,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 02:48:20,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:20,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 02:48:20,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-02-24 02:48:20,725 INFO L87 Difference]: Start difference. First operand 823 states and 981 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:48:24,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:24,049 INFO L93 Difference]: Finished difference Result 991 states and 1183 transitions. [2022-02-24 02:48:24,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 02:48:24,050 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-24 02:48:24,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:24,051 INFO L225 Difference]: With dead ends: 991 [2022-02-24 02:48:24,051 INFO L226 Difference]: Without dead ends: 989 [2022-02-24 02:48:24,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=914, Invalid=5092, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 02:48:24,052 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 282 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:24,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 119 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:48:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-02-24 02:48:25,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 832. [2022-02-24 02:48:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 788 states have (on average 1.1878172588832487) internal successors, (936), 805 states have internal predecessors, (936), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (27), 11 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-24 02:48:25,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 992 transitions. [2022-02-24 02:48:25,069 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 992 transitions. Word has length 66 [2022-02-24 02:48:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:25,070 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 992 transitions. [2022-02-24 02:48:25,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:48:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 992 transitions. [2022-02-24 02:48:25,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:48:25,071 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:25,071 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:25,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-24 02:48:25,071 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:25,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:25,072 INFO L85 PathProgramCache]: Analyzing trace with hash 958384667, now seen corresponding path program 14 times [2022-02-24 02:48:25,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:25,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336828829] [2022-02-24 02:48:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:25,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:25,074 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:25,074 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:25,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:25,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 02:48:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:25,467 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:25,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336828829] [2022-02-24 02:48:25,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [336828829] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:25,467 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:25,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 02:48:25,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097352840] [2022-02-24 02:48:25,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:25,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 02:48:25,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:25,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 02:48:25,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:48:25,468 INFO L87 Difference]: Start difference. First operand 832 states and 992 transitions. Second operand has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:48:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:28,645 INFO L93 Difference]: Finished difference Result 958 states and 1138 transitions. [2022-02-24 02:48:28,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 02:48:28,645 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-24 02:48:28,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:28,647 INFO L225 Difference]: With dead ends: 958 [2022-02-24 02:48:28,647 INFO L226 Difference]: Without dead ends: 956 [2022-02-24 02:48:28,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=604, Invalid=4366, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 02:48:28,648 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 165 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:28,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 131 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2092 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:48:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-02-24 02:48:29,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 838. [2022-02-24 02:48:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 794 states have (on average 1.1889168765743072) internal successors, (944), 811 states have internal predecessors, (944), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (27), 11 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-24 02:48:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1000 transitions. [2022-02-24 02:48:29,780 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1000 transitions. Word has length 66 [2022-02-24 02:48:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:29,780 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1000 transitions. [2022-02-24 02:48:29,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:48:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1000 transitions. [2022-02-24 02:48:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:48:29,782 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:29,782 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:29,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-24 02:48:29,782 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:29,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:29,782 INFO L85 PathProgramCache]: Analyzing trace with hash 276895843, now seen corresponding path program 12 times [2022-02-24 02:48:29,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:29,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799593645] [2022-02-24 02:48:29,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:29,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:29,784 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:29,785 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:30,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:30,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 02:48:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:30,617 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:30,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799593645] [2022-02-24 02:48:30,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [799593645] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:30,617 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:30,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 02:48:30,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619109101] [2022-02-24 02:48:30,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:30,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 02:48:30,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:30,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 02:48:30,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 02:48:30,618 INFO L87 Difference]: Start difference. First operand 838 states and 1000 transitions. Second operand has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:48:35,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:35,599 INFO L93 Difference]: Finished difference Result 1060 states and 1258 transitions. [2022-02-24 02:48:35,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-24 02:48:35,600 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-24 02:48:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:35,602 INFO L225 Difference]: With dead ends: 1060 [2022-02-24 02:48:35,602 INFO L226 Difference]: Without dead ends: 1058 [2022-02-24 02:48:35,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2932 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1079, Invalid=8821, Unknown=0, NotChecked=0, Total=9900 [2022-02-24 02:48:35,603 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 282 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:35,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 115 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 2387 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 02:48:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-02-24 02:48:36,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 882. [2022-02-24 02:48:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 835 states have (on average 1.1868263473053893) internal successors, (991), 853 states have internal predecessors, (991), 31 states have call successors, (31), 16 states have call predecessors, (31), 15 states have return successors, (29), 12 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-24 02:48:36,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1051 transitions. [2022-02-24 02:48:36,879 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1051 transitions. Word has length 66 [2022-02-24 02:48:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:36,879 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 1051 transitions. [2022-02-24 02:48:36,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:48:36,879 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1051 transitions. [2022-02-24 02:48:36,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:48:36,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:36,881 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:36,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-24 02:48:36,881 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:36,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:36,881 INFO L85 PathProgramCache]: Analyzing trace with hash -614168551, now seen corresponding path program 13 times [2022-02-24 02:48:36,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:36,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240449231] [2022-02-24 02:48:36,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:36,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:36,884 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:36,885 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:37,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:37,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 02:48:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:37,801 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:37,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240449231] [2022-02-24 02:48:37,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1240449231] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:37,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:37,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 02:48:37,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34271850] [2022-02-24 02:48:37,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:37,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 02:48:37,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:37,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 02:48:37,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 02:48:37,802 INFO L87 Difference]: Start difference. First operand 882 states and 1051 transitions. Second operand has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:48:41,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:41,861 INFO L93 Difference]: Finished difference Result 1060 states and 1259 transitions. [2022-02-24 02:48:41,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-24 02:48:41,862 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-24 02:48:41,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:41,863 INFO L225 Difference]: With dead ends: 1060 [2022-02-24 02:48:41,863 INFO L226 Difference]: Without dead ends: 1058 [2022-02-24 02:48:41,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2872 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=878, Invalid=8052, Unknown=0, NotChecked=0, Total=8930 [2022-02-24 02:48:41,864 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 262 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2439 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:41,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 97 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2439 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:48:41,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-02-24 02:48:43,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 894. [2022-02-24 02:48:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 847 states have (on average 1.1877213695395514) internal successors, (1006), 865 states have internal predecessors, (1006), 31 states have call successors, (31), 16 states have call predecessors, (31), 15 states have return successors, (29), 12 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-24 02:48:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1066 transitions. [2022-02-24 02:48:43,067 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1066 transitions. Word has length 66 [2022-02-24 02:48:43,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:43,067 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 1066 transitions. [2022-02-24 02:48:43,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:48:43,067 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1066 transitions. [2022-02-24 02:48:43,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:48:43,068 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:43,068 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:43,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-24 02:48:43,069 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:43,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:43,069 INFO L85 PathProgramCache]: Analyzing trace with hash 610957489, now seen corresponding path program 14 times [2022-02-24 02:48:43,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:43,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996227635] [2022-02-24 02:48:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:43,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:43,072 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:43,072 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:43,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:43,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 02:48:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:43,790 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:43,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996227635] [2022-02-24 02:48:43,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [996227635] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:43,790 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:43,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 02:48:43,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317984905] [2022-02-24 02:48:43,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:43,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 02:48:43,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:43,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 02:48:43,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:48:43,791 INFO L87 Difference]: Start difference. First operand 894 states and 1066 transitions. Second operand has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:48:46,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:46,464 INFO L93 Difference]: Finished difference Result 951 states and 1128 transitions. [2022-02-24 02:48:46,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 02:48:46,464 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-24 02:48:46,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:46,466 INFO L225 Difference]: With dead ends: 951 [2022-02-24 02:48:46,466 INFO L226 Difference]: Without dead ends: 949 [2022-02-24 02:48:46,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=508, Invalid=3782, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 02:48:46,467 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 147 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:46,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 84 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:48:46,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-02-24 02:48:47,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 878. [2022-02-24 02:48:47,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 833 states have (on average 1.1884753901560625) internal successors, (990), 850 states have internal predecessors, (990), 29 states have call successors, (29), 16 states have call predecessors, (29), 15 states have return successors, (27), 11 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-24 02:48:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1046 transitions. [2022-02-24 02:48:47,681 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1046 transitions. Word has length 66 [2022-02-24 02:48:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:47,681 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1046 transitions. [2022-02-24 02:48:47,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:48:47,682 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1046 transitions. [2022-02-24 02:48:47,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:48:47,683 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:47,683 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:47,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-24 02:48:47,683 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:47,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:47,683 INFO L85 PathProgramCache]: Analyzing trace with hash -275259755, now seen corresponding path program 15 times [2022-02-24 02:48:47,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:47,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338682962] [2022-02-24 02:48:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:47,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:47,686 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:47,686 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:48,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:48,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-24 02:48:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:48,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-24 02:48:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:48,063 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:48,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338682962] [2022-02-24 02:48:48,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [338682962] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:48,063 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:48,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 02:48:48,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633515414] [2022-02-24 02:48:48,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:48,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 02:48:48,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:48,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 02:48:48,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:48:48,064 INFO L87 Difference]: Start difference. First operand 878 states and 1046 transitions. Second operand has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:48:51,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:51,153 INFO L93 Difference]: Finished difference Result 1056 states and 1260 transitions. [2022-02-24 02:48:51,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 02:48:51,154 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-02-24 02:48:51,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:51,156 INFO L225 Difference]: With dead ends: 1056 [2022-02-24 02:48:51,156 INFO L226 Difference]: Without dead ends: 1054 [2022-02-24 02:48:51,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=453, Invalid=3207, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 02:48:51,157 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 228 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:51,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 121 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:48:51,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-02-24 02:48:52,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 932. [2022-02-24 02:48:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 877 states have (on average 1.1812998859749144) internal successors, (1036), 901 states have internal predecessors, (1036), 39 states have call successors, (39), 16 states have call predecessors, (39), 15 states have return successors, (37), 14 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-24 02:48:52,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1112 transitions. [2022-02-24 02:48:52,525 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1112 transitions. Word has length 68 [2022-02-24 02:48:52,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:52,525 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 1112 transitions. [2022-02-24 02:48:52,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:48:52,525 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1112 transitions. [2022-02-24 02:48:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:48:52,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:52,526 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:52,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-24 02:48:52,527 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:52,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:52,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1734012123, now seen corresponding path program 16 times [2022-02-24 02:48:52,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:52,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146673696] [2022-02-24 02:48:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:52,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:52,529 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:52,529 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:52,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:52,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-24 02:48:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:52,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-24 02:48:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:52,923 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:52,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146673696] [2022-02-24 02:48:52,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2146673696] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:52,924 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:52,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 02:48:52,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481746329] [2022-02-24 02:48:52,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:52,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 02:48:52,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:52,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 02:48:52,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:48:52,925 INFO L87 Difference]: Start difference. First operand 932 states and 1112 transitions. Second operand has 22 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:48:55,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:55,336 INFO L93 Difference]: Finished difference Result 988 states and 1178 transitions. [2022-02-24 02:48:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 02:48:55,336 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-02-24 02:48:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:55,338 INFO L225 Difference]: With dead ends: 988 [2022-02-24 02:48:55,338 INFO L226 Difference]: Without dead ends: 986 [2022-02-24 02:48:55,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=236, Invalid=1570, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 02:48:55,339 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 126 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:55,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 85 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1254 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:48:55,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2022-02-24 02:48:56,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 926. [2022-02-24 02:48:56,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 872 states have (on average 1.1823394495412844) internal successors, (1031), 895 states have internal predecessors, (1031), 38 states have call successors, (38), 16 states have call predecessors, (38), 15 states have return successors, (36), 14 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-24 02:48:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1105 transitions. [2022-02-24 02:48:56,768 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1105 transitions. Word has length 68 [2022-02-24 02:48:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:56,768 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1105 transitions. [2022-02-24 02:48:56,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:48:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1105 transitions. [2022-02-24 02:48:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:48:56,770 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:56,770 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:56,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-24 02:48:56,770 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:56,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:56,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1737340720, now seen corresponding path program 22 times [2022-02-24 02:48:56,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:56,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766081849] [2022-02-24 02:48:56,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:56,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:56,774 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:56,774 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:57,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:57,663 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:57,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766081849] [2022-02-24 02:48:57,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1766081849] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:57,663 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:57,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 02:48:57,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952400275] [2022-02-24 02:48:57,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:57,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 02:48:57,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:57,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 02:48:57,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:48:57,664 INFO L87 Difference]: Start difference. First operand 926 states and 1105 transitions. Second operand has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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) [2022-02-24 02:49:02,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:02,205 INFO L93 Difference]: Finished difference Result 1266 states and 1520 transitions. [2022-02-24 02:49:02,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 02:49:02,205 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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 66 [2022-02-24 02:49:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:02,207 INFO L225 Difference]: With dead ends: 1266 [2022-02-24 02:49:02,207 INFO L226 Difference]: Without dead ends: 1264 [2022-02-24 02:49:02,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2304 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=727, Invalid=6755, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 02:49:02,208 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 409 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2782 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 2782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:02,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 110 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 2782 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 02:49:02,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-02-24 02:49:03,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 989. [2022-02-24 02:49:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 928 states have (on average 1.1799568965517242) internal successors, (1095), 956 states have internal predecessors, (1095), 43 states have call successors, (43), 18 states have call predecessors, (43), 17 states have return successors, (41), 14 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-24 02:49:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1179 transitions. [2022-02-24 02:49:03,665 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1179 transitions. Word has length 66 [2022-02-24 02:49:03,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:03,666 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 1179 transitions. [2022-02-24 02:49:03,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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) [2022-02-24 02:49:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1179 transitions. [2022-02-24 02:49:03,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:49:03,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:03,667 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:03,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-24 02:49:03,667 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:03,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:03,668 INFO L85 PathProgramCache]: Analyzing trace with hash 688449750, now seen corresponding path program 23 times [2022-02-24 02:49:03,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:03,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177387973] [2022-02-24 02:49:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:03,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:03,670 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:03,670 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:04,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:04,135 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:04,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177387973] [2022-02-24 02:49:04,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [177387973] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:04,135 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:04,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 02:49:04,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649538171] [2022-02-24 02:49:04,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:04,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 02:49:04,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:04,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 02:49:04,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:49:04,136 INFO L87 Difference]: Start difference. First operand 989 states and 1179 transitions. Second operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 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) [2022-02-24 02:49:07,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:07,951 INFO L93 Difference]: Finished difference Result 1172 states and 1400 transitions. [2022-02-24 02:49:07,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 02:49:07,951 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 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 66 [2022-02-24 02:49:07,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:07,953 INFO L225 Difference]: With dead ends: 1172 [2022-02-24 02:49:07,953 INFO L226 Difference]: Without dead ends: 1170 [2022-02-24 02:49:07,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=739, Invalid=4811, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 02:49:07,954 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 302 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 2294 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:07,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 112 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2294 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:49:07,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-02-24 02:49:09,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1005. [2022-02-24 02:49:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 942 states have (on average 1.1794055201698515) internal successors, (1111), 971 states have internal predecessors, (1111), 44 states have call successors, (44), 19 states have call predecessors, (44), 18 states have return successors, (42), 14 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-24 02:49:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1197 transitions. [2022-02-24 02:49:09,364 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1197 transitions. Word has length 66 [2022-02-24 02:49:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:09,364 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 1197 transitions. [2022-02-24 02:49:09,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 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) [2022-02-24 02:49:09,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1197 transitions. [2022-02-24 02:49:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:49:09,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:09,365 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:09,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-24 02:49:09,366 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:09,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:09,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1136950192, now seen corresponding path program 24 times [2022-02-24 02:49:09,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:09,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815016100] [2022-02-24 02:49:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:09,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:09,368 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:09,368 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:10,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:10,060 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:10,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815016100] [2022-02-24 02:49:10,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1815016100] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:10,060 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:10,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:49:10,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334377275] [2022-02-24 02:49:10,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:10,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:49:10,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:10,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:49:10,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:49:10,061 INFO L87 Difference]: Start difference. First operand 1005 states and 1197 transitions. Second operand has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 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) [2022-02-24 02:49:16,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:16,689 INFO L93 Difference]: Finished difference Result 1490 states and 1800 transitions. [2022-02-24 02:49:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-24 02:49:16,690 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 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 66 [2022-02-24 02:49:16,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:16,692 INFO L225 Difference]: With dead ends: 1490 [2022-02-24 02:49:16,692 INFO L226 Difference]: Without dead ends: 1488 [2022-02-24 02:49:16,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1459, Invalid=10313, Unknown=0, NotChecked=0, Total=11772 [2022-02-24 02:49:16,693 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 651 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:16,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 77 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [565 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 02:49:16,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-02-24 02:49:18,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 985. [2022-02-24 02:49:18,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 921 states have (on average 1.1769815418023888) internal successors, (1084), 950 states have internal predecessors, (1084), 44 states have call successors, (44), 20 states have call predecessors, (44), 19 states have return successors, (42), 14 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-24 02:49:18,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1170 transitions. [2022-02-24 02:49:18,128 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1170 transitions. Word has length 66 [2022-02-24 02:49:18,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:18,128 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 1170 transitions. [2022-02-24 02:49:18,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 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) [2022-02-24 02:49:18,128 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1170 transitions. [2022-02-24 02:49:18,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:49:18,129 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:18,129 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:18,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-24 02:49:18,130 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:18,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:18,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2061955934, now seen corresponding path program 25 times [2022-02-24 02:49:18,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:18,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62701063] [2022-02-24 02:49:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:18,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:18,132 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:18,132 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:18,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:18,584 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:18,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62701063] [2022-02-24 02:49:18,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [62701063] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:18,584 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:18,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 02:49:18,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437639318] [2022-02-24 02:49:18,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:18,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 02:49:18,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:18,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 02:49:18,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:49:18,585 INFO L87 Difference]: Start difference. First operand 985 states and 1170 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2022-02-24 02:49:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:21,527 INFO L93 Difference]: Finished difference Result 1111 states and 1323 transitions. [2022-02-24 02:49:21,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 02:49:21,528 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 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 66 [2022-02-24 02:49:21,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:21,530 INFO L225 Difference]: With dead ends: 1111 [2022-02-24 02:49:21,530 INFO L226 Difference]: Without dead ends: 1109 [2022-02-24 02:49:21,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=646, Invalid=3260, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 02:49:21,530 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 173 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:21,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 87 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:49:21,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-02-24 02:49:23,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1003. [2022-02-24 02:49:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 940 states have (on average 1.1808510638297873) internal successors, (1110), 968 states have internal predecessors, (1110), 43 states have call successors, (43), 20 states have call predecessors, (43), 19 states have return successors, (41), 14 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-24 02:49:23,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1194 transitions. [2022-02-24 02:49:23,009 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1194 transitions. Word has length 66 [2022-02-24 02:49:23,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:23,009 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1194 transitions. [2022-02-24 02:49:23,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2022-02-24 02:49:23,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1194 transitions. [2022-02-24 02:49:23,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:49:23,011 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:23,011 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:23,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-24 02:49:23,011 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:23,011 INFO L85 PathProgramCache]: Analyzing trace with hash -140337438, now seen corresponding path program 26 times [2022-02-24 02:49:23,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:23,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287522139] [2022-02-24 02:49:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:23,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:23,014 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:23,014 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:23,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:23,782 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:23,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287522139] [2022-02-24 02:49:23,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [287522139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:23,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:23,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 02:49:23,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453515505] [2022-02-24 02:49:23,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:23,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 02:49:23,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:23,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 02:49:23,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 02:49:23,783 INFO L87 Difference]: Start difference. First operand 1003 states and 1194 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 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) [2022-02-24 02:49:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:27,425 INFO L93 Difference]: Finished difference Result 1110 states and 1322 transitions. [2022-02-24 02:49:27,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 02:49:27,425 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 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 66 [2022-02-24 02:49:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:27,427 INFO L225 Difference]: With dead ends: 1110 [2022-02-24 02:49:27,428 INFO L226 Difference]: Without dead ends: 1108 [2022-02-24 02:49:27,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=741, Invalid=4809, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 02:49:27,428 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 245 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2420 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:27,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 111 Invalid, 2584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2420 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:49:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-02-24 02:49:28,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1009. [2022-02-24 02:49:28,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 946 states have (on average 1.1818181818181819) internal successors, (1118), 974 states have internal predecessors, (1118), 43 states have call successors, (43), 20 states have call predecessors, (43), 19 states have return successors, (41), 14 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-24 02:49:28,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1202 transitions. [2022-02-24 02:49:28,903 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1202 transitions. Word has length 66 [2022-02-24 02:49:28,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:28,903 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1202 transitions. [2022-02-24 02:49:28,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 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) [2022-02-24 02:49:28,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1202 transitions. [2022-02-24 02:49:28,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:49:28,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:28,905 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:28,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-24 02:49:28,905 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:28,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:28,905 INFO L85 PathProgramCache]: Analyzing trace with hash -337327382, now seen corresponding path program 19 times [2022-02-24 02:49:28,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:28,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292448727] [2022-02-24 02:49:28,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:28,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:28,909 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:28,909 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:29,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:29,442 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:29,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292448727] [2022-02-24 02:49:29,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1292448727] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:29,442 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:29,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:49:29,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852860268] [2022-02-24 02:49:29,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:29,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:49:29,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:29,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:49:29,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:49:29,443 INFO L87 Difference]: Start difference. First operand 1009 states and 1202 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2022-02-24 02:49:32,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:32,456 INFO L93 Difference]: Finished difference Result 1149 states and 1371 transitions. [2022-02-24 02:49:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 02:49:32,457 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 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 66 [2022-02-24 02:49:32,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:32,459 INFO L225 Difference]: With dead ends: 1149 [2022-02-24 02:49:32,459 INFO L226 Difference]: Without dead ends: 1147 [2022-02-24 02:49:32,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=543, Invalid=2879, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 02:49:32,459 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 158 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:32,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 55 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:49:32,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-02-24 02:49:33,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1034. [2022-02-24 02:49:33,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 968 states have (on average 1.1828512396694215) internal successors, (1145), 998 states have internal predecessors, (1145), 45 states have call successors, (45), 21 states have call predecessors, (45), 20 states have return successors, (43), 14 states have call predecessors, (43), 43 states have call successors, (43) [2022-02-24 02:49:33,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1233 transitions. [2022-02-24 02:49:33,982 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1233 transitions. Word has length 66 [2022-02-24 02:49:33,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:33,983 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 1233 transitions. [2022-02-24 02:49:33,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2022-02-24 02:49:33,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1233 transitions. [2022-02-24 02:49:33,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:49:33,984 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:33,984 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:33,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-24 02:49:33,984 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:33,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:33,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1584291114, now seen corresponding path program 20 times [2022-02-24 02:49:33,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:33,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048516525] [2022-02-24 02:49:33,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:33,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:33,987 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:33,987 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:34,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:34,517 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:34,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048516525] [2022-02-24 02:49:34,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1048516525] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:34,517 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:34,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 02:49:34,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37343944] [2022-02-24 02:49:34,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:34,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 02:49:34,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:34,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 02:49:34,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:49:34,518 INFO L87 Difference]: Start difference. First operand 1034 states and 1233 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2022-02-24 02:49:37,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:37,761 INFO L93 Difference]: Finished difference Result 1155 states and 1377 transitions. [2022-02-24 02:49:37,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 02:49:37,761 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 66 [2022-02-24 02:49:37,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:37,763 INFO L225 Difference]: With dead ends: 1155 [2022-02-24 02:49:37,763 INFO L226 Difference]: Without dead ends: 1153 [2022-02-24 02:49:37,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=514, Invalid=3646, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 02:49:37,764 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 228 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:37,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 62 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:49:37,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-02-24 02:49:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1031. [2022-02-24 02:49:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 965 states have (on average 1.1823834196891192) internal successors, (1141), 995 states have internal predecessors, (1141), 45 states have call successors, (45), 21 states have call predecessors, (45), 20 states have return successors, (43), 14 states have call predecessors, (43), 43 states have call successors, (43) [2022-02-24 02:49:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1229 transitions. [2022-02-24 02:49:39,319 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1229 transitions. Word has length 66 [2022-02-24 02:49:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:39,319 INFO L470 AbstractCegarLoop]: Abstraction has 1031 states and 1229 transitions. [2022-02-24 02:49:39,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2022-02-24 02:49:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1229 transitions. [2022-02-24 02:49:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:49:39,321 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:39,321 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:39,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-24 02:49:39,321 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:39,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1237330082, now seen corresponding path program 21 times [2022-02-24 02:49:39,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:39,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532146282] [2022-02-24 02:49:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:39,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:39,324 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:39,324 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:39,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:39,848 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:39,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532146282] [2022-02-24 02:49:39,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [532146282] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:39,848 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:39,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 02:49:39,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657061843] [2022-02-24 02:49:39,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:39,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 02:49:39,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:39,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 02:49:39,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:49:39,849 INFO L87 Difference]: Start difference. First operand 1031 states and 1229 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2022-02-24 02:49:42,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:42,818 INFO L93 Difference]: Finished difference Result 1170 states and 1390 transitions. [2022-02-24 02:49:42,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 02:49:42,818 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 66 [2022-02-24 02:49:42,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:42,820 INFO L225 Difference]: With dead ends: 1170 [2022-02-24 02:49:42,820 INFO L226 Difference]: Without dead ends: 1168 [2022-02-24 02:49:42,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=413, Invalid=2667, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 02:49:42,821 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 143 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:42,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 86 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1387 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:49:42,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2022-02-24 02:49:44,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1016. [2022-02-24 02:49:44,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 952 states have (on average 1.1827731092436975) internal successors, (1126), 980 states have internal predecessors, (1126), 43 states have call successors, (43), 21 states have call predecessors, (43), 20 states have return successors, (41), 14 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-24 02:49:44,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1210 transitions. [2022-02-24 02:49:44,297 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1210 transitions. Word has length 66 [2022-02-24 02:49:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:44,297 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 1210 transitions. [2022-02-24 02:49:44,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2022-02-24 02:49:44,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1210 transitions. [2022-02-24 02:49:44,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:49:44,299 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:44,299 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:44,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-24 02:49:44,299 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:44,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:44,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1870934436, now seen corresponding path program 22 times [2022-02-24 02:49:44,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:44,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740258449] [2022-02-24 02:49:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:44,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:44,301 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:44,302 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:44,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:44,848 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:44,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740258449] [2022-02-24 02:49:44,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [740258449] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:44,848 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:44,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 02:49:44,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499823808] [2022-02-24 02:49:44,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:44,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 02:49:44,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:44,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 02:49:44,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:49:44,849 INFO L87 Difference]: Start difference. First operand 1016 states and 1210 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2022-02-24 02:49:47,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:47,802 INFO L93 Difference]: Finished difference Result 1187 states and 1415 transitions. [2022-02-24 02:49:47,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 02:49:47,802 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 66 [2022-02-24 02:49:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:47,804 INFO L225 Difference]: With dead ends: 1187 [2022-02-24 02:49:47,804 INFO L226 Difference]: Without dead ends: 1185 [2022-02-24 02:49:47,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=422, Invalid=2658, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 02:49:47,805 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 153 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:47,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 55 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:49:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-02-24 02:49:49,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1022. [2022-02-24 02:49:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 958 states have (on average 1.1837160751565763) internal successors, (1134), 986 states have internal predecessors, (1134), 43 states have call successors, (43), 21 states have call predecessors, (43), 20 states have return successors, (41), 14 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-24 02:49:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1218 transitions. [2022-02-24 02:49:49,323 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1218 transitions. Word has length 66 [2022-02-24 02:49:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:49,323 INFO L470 AbstractCegarLoop]: Abstraction has 1022 states and 1218 transitions. [2022-02-24 02:49:49,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2022-02-24 02:49:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1218 transitions. [2022-02-24 02:49:49,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:49:49,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:49,324 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:49,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-24 02:49:49,325 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:49,325 INFO L85 PathProgramCache]: Analyzing trace with hash 667727747, now seen corresponding path program 15 times [2022-02-24 02:49:49,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:49,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385990999] [2022-02-24 02:49:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:49,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:49,328 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:49,328 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:49,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:49,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-24 02:49:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:49,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 02:49:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:49,982 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:49,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385990999] [2022-02-24 02:49:49,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [385990999] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:49,982 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:49,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 02:49:49,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826155141] [2022-02-24 02:49:49,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:49,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 02:49:49,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:49,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 02:49:49,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:49:49,983 INFO L87 Difference]: Start difference. First operand 1022 states and 1218 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:49:53,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:53,607 INFO L93 Difference]: Finished difference Result 1077 states and 1281 transitions. [2022-02-24 02:49:53,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 02:49:53,608 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 69 [2022-02-24 02:49:53,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:53,610 INFO L225 Difference]: With dead ends: 1077 [2022-02-24 02:49:53,610 INFO L226 Difference]: Without dead ends: 1042 [2022-02-24 02:49:53,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=637, Invalid=4619, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 02:49:53,611 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 172 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:53,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 107 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1919 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:49:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-02-24 02:49:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 963. [2022-02-24 02:49:55,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 905 states have (on average 1.188950276243094) internal successors, (1076), 930 states have internal predecessors, (1076), 39 states have call successors, (39), 19 states have call predecessors, (39), 18 states have return successors, (37), 13 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-24 02:49:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1152 transitions. [2022-02-24 02:49:55,102 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1152 transitions. Word has length 69 [2022-02-24 02:49:55,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:55,102 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1152 transitions. [2022-02-24 02:49:55,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:49:55,102 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1152 transitions. [2022-02-24 02:49:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:49:55,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:55,104 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:55,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-24 02:49:55,104 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:55,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:55,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1360968119, now seen corresponding path program 16 times [2022-02-24 02:49:55,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:55,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774338581] [2022-02-24 02:49:55,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:55,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:55,107 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:55,107 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:56,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:56,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-24 02:49:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:56,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 02:49:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:56,052 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:56,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774338581] [2022-02-24 02:49:56,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [774338581] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:56,052 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:56,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 02:49:56,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124624500] [2022-02-24 02:49:56,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:56,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 02:49:56,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:56,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 02:49:56,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 02:49:56,053 INFO L87 Difference]: Start difference. First operand 963 states and 1152 transitions. Second operand has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:50:00,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:00,222 INFO L93 Difference]: Finished difference Result 1086 states and 1289 transitions. [2022-02-24 02:50:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 02:50:00,223 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 69 [2022-02-24 02:50:00,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:00,224 INFO L225 Difference]: With dead ends: 1086 [2022-02-24 02:50:00,225 INFO L226 Difference]: Without dead ends: 1039 [2022-02-24 02:50:00,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2489 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1041, Invalid=7149, Unknown=0, NotChecked=0, Total=8190 [2022-02-24 02:50:00,225 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 239 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:00,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 98 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:50:00,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-02-24 02:50:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 969. [2022-02-24 02:50:01,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 911 states have (on average 1.1888035126234906) internal successors, (1083), 936 states have internal predecessors, (1083), 39 states have call successors, (39), 19 states have call predecessors, (39), 18 states have return successors, (37), 13 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-24 02:50:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1159 transitions. [2022-02-24 02:50:01,700 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1159 transitions. Word has length 69 [2022-02-24 02:50:01,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:01,701 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1159 transitions. [2022-02-24 02:50:01,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:50:01,701 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1159 transitions. [2022-02-24 02:50:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:50:01,702 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:01,702 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:01,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-24 02:50:01,703 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:01,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1404533430, now seen corresponding path program 17 times [2022-02-24 02:50:01,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:01,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047962707] [2022-02-24 02:50:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:01,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:01,706 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:01,706 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:02,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:02,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-24 02:50:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:02,205 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:02,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047962707] [2022-02-24 02:50:02,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2047962707] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:02,205 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:02,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 02:50:02,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728595976] [2022-02-24 02:50:02,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:02,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 02:50:02,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:02,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 02:50:02,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:50:02,206 INFO L87 Difference]: Start difference. First operand 969 states and 1159 transitions. Second operand has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:50:05,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:05,899 INFO L93 Difference]: Finished difference Result 1184 states and 1424 transitions. [2022-02-24 02:50:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 02:50:05,900 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-02-24 02:50:05,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:05,902 INFO L225 Difference]: With dead ends: 1184 [2022-02-24 02:50:05,902 INFO L226 Difference]: Without dead ends: 1182 [2022-02-24 02:50:05,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=458, Invalid=3964, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 02:50:05,903 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 279 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:05,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 148 Invalid, 2657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:50:05,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2022-02-24 02:50:07,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1001. [2022-02-24 02:50:07,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 940 states have (on average 1.1904255319148935) internal successors, (1119), 966 states have internal predecessors, (1119), 41 states have call successors, (41), 20 states have call predecessors, (41), 19 states have return successors, (39), 14 states have call predecessors, (39), 39 states have call successors, (39) [2022-02-24 02:50:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1199 transitions. [2022-02-24 02:50:07,452 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1199 transitions. Word has length 68 [2022-02-24 02:50:07,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:07,452 INFO L470 AbstractCegarLoop]: Abstraction has 1001 states and 1199 transitions. [2022-02-24 02:50:07,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:50:07,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1199 transitions. [2022-02-24 02:50:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:50:07,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:07,454 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:07,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-24 02:50:07,454 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:07,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:07,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2068396432, now seen corresponding path program 18 times [2022-02-24 02:50:07,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:07,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597609916] [2022-02-24 02:50:07,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:07,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:07,456 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:07,457 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:07,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:07,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-24 02:50:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:07,937 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:07,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597609916] [2022-02-24 02:50:07,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1597609916] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:07,937 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:07,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 02:50:07,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684464108] [2022-02-24 02:50:07,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:07,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 02:50:07,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:07,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 02:50:07,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:50:07,938 INFO L87 Difference]: Start difference. First operand 1001 states and 1199 transitions. Second operand has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:50:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:12,384 INFO L93 Difference]: Finished difference Result 1372 states and 1661 transitions. [2022-02-24 02:50:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 02:50:12,385 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-02-24 02:50:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:12,387 INFO L225 Difference]: With dead ends: 1372 [2022-02-24 02:50:12,387 INFO L226 Difference]: Without dead ends: 1370 [2022-02-24 02:50:12,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=5193, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 02:50:12,387 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 371 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2197 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 2197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:12,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 122 Invalid, 2429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 2197 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:50:12,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2022-02-24 02:50:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1057. [2022-02-24 02:50:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 992 states have (on average 1.1925403225806452) internal successors, (1183), 1020 states have internal predecessors, (1183), 44 states have call successors, (44), 21 states have call predecessors, (44), 20 states have return successors, (42), 15 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-24 02:50:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1269 transitions. [2022-02-24 02:50:14,052 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1269 transitions. Word has length 68 [2022-02-24 02:50:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:14,053 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 1269 transitions. [2022-02-24 02:50:14,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:50:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1269 transitions. [2022-02-24 02:50:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:50:14,054 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:14,054 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:14,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-24 02:50:14,054 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:14,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1659314518, now seen corresponding path program 19 times [2022-02-24 02:50:14,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:14,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788850296] [2022-02-24 02:50:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:14,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:14,057 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:14,057 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:14,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:14,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-24 02:50:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:14,511 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:14,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788850296] [2022-02-24 02:50:14,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [788850296] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:14,511 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:14,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 02:50:14,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171847318] [2022-02-24 02:50:14,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:14,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 02:50:14,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:14,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 02:50:14,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:50:14,512 INFO L87 Difference]: Start difference. First operand 1057 states and 1269 transitions. Second operand has 26 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:50:18,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:18,295 INFO L93 Difference]: Finished difference Result 1277 states and 1538 transitions. [2022-02-24 02:50:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 02:50:18,296 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-02-24 02:50:18,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:18,297 INFO L225 Difference]: With dead ends: 1277 [2022-02-24 02:50:18,297 INFO L226 Difference]: Without dead ends: 1275 [2022-02-24 02:50:18,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=3105, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 02:50:18,298 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 251 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:18,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 96 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2351 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:50:18,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-02-24 02:50:20,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1081. [2022-02-24 02:50:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1014 states have (on average 1.193293885601578) internal successors, (1210), 1044 states have internal predecessors, (1210), 46 states have call successors, (46), 21 states have call predecessors, (46), 20 states have return successors, (44), 15 states have call predecessors, (44), 44 states have call successors, (44) [2022-02-24 02:50:20,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1300 transitions. [2022-02-24 02:50:20,031 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1300 transitions. Word has length 68 [2022-02-24 02:50:20,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:20,031 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1300 transitions. [2022-02-24 02:50:20,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:50:20,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1300 transitions. [2022-02-24 02:50:20,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:50:20,033 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:20,033 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:20,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-24 02:50:20,033 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:20,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1755632320, now seen corresponding path program 17 times [2022-02-24 02:50:20,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:20,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992073568] [2022-02-24 02:50:20,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:20,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:20,036 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:20,036 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:20,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:20,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 02:50:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:20,928 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:20,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992073568] [2022-02-24 02:50:20,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1992073568] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:20,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:20,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 02:50:20,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692498446] [2022-02-24 02:50:20,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:20,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 02:50:20,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:20,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 02:50:20,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 02:50:20,929 INFO L87 Difference]: Start difference. First operand 1081 states and 1300 transitions. Second operand has 34 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:50:28,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:28,039 INFO L93 Difference]: Finished difference Result 1348 states and 1619 transitions. [2022-02-24 02:50:28,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-24 02:50:28,040 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-24 02:50:28,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:28,042 INFO L225 Difference]: With dead ends: 1348 [2022-02-24 02:50:28,042 INFO L226 Difference]: Without dead ends: 1346 [2022-02-24 02:50:28,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5330 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1891, Invalid=13609, Unknown=0, NotChecked=0, Total=15500 [2022-02-24 02:50:28,043 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 371 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3201 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 3624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 3201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:28,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 129 Invalid, 3624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 3201 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 02:50:28,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-02-24 02:50:29,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1102. [2022-02-24 02:50:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1035 states have (on average 1.1942028985507247) internal successors, (1236), 1065 states have internal predecessors, (1236), 46 states have call successors, (46), 21 states have call predecessors, (46), 20 states have return successors, (44), 15 states have call predecessors, (44), 44 states have call successors, (44) [2022-02-24 02:50:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1326 transitions. [2022-02-24 02:50:29,899 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1326 transitions. Word has length 69 [2022-02-24 02:50:29,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:29,900 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1326 transitions. [2022-02-24 02:50:29,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:50:29,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1326 transitions. [2022-02-24 02:50:29,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:50:29,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:29,901 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:29,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-24 02:50:29,901 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:29,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:29,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1758967990, now seen corresponding path program 18 times [2022-02-24 02:50:29,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:29,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695231727] [2022-02-24 02:50:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:29,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:29,904 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:29,904 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:30,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:30,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 02:50:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:30,676 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:30,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695231727] [2022-02-24 02:50:30,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1695231727] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:30,677 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:30,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 02:50:30,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617940344] [2022-02-24 02:50:30,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:30,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 02:50:30,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:30,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 02:50:30,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 02:50:30,677 INFO L87 Difference]: Start difference. First operand 1102 states and 1326 transitions. Second operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:50:34,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:34,662 INFO L93 Difference]: Finished difference Result 1310 states and 1579 transitions. [2022-02-24 02:50:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 02:50:34,662 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-24 02:50:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:34,664 INFO L225 Difference]: With dead ends: 1310 [2022-02-24 02:50:34,665 INFO L226 Difference]: Without dead ends: 1308 [2022-02-24 02:50:34,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=691, Invalid=4711, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 02:50:34,665 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 205 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:34,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 92 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:50:34,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-02-24 02:50:36,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1129. [2022-02-24 02:50:36,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1060 states have (on average 1.1952830188679244) internal successors, (1267), 1092 states have internal predecessors, (1267), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (46), 15 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-24 02:50:36,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1361 transitions. [2022-02-24 02:50:36,538 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1361 transitions. Word has length 69 [2022-02-24 02:50:36,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:36,538 INFO L470 AbstractCegarLoop]: Abstraction has 1129 states and 1361 transitions. [2022-02-24 02:50:36,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:50:36,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1361 transitions. [2022-02-24 02:50:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:50:36,539 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:36,539 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:36,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-24 02:50:36,539 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:36,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:36,540 INFO L85 PathProgramCache]: Analyzing trace with hash -310743238, now seen corresponding path program 19 times [2022-02-24 02:50:36,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:36,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088302543] [2022-02-24 02:50:36,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:36,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:36,542 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:36,543 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:37,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:37,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 02:50:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:37,486 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:37,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088302543] [2022-02-24 02:50:37,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1088302543] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:37,486 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:37,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 02:50:37,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598165854] [2022-02-24 02:50:37,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:37,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 02:50:37,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:37,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 02:50:37,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:50:37,487 INFO L87 Difference]: Start difference. First operand 1129 states and 1361 transitions. Second operand has 36 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:50:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:42,628 INFO L93 Difference]: Finished difference Result 1250 states and 1504 transitions. [2022-02-24 02:50:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 02:50:42,629 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-24 02:50:42,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:42,630 INFO L225 Difference]: With dead ends: 1250 [2022-02-24 02:50:42,630 INFO L226 Difference]: Without dead ends: 1248 [2022-02-24 02:50:42,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2444 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=937, Invalid=7435, Unknown=0, NotChecked=0, Total=8372 [2022-02-24 02:50:42,631 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 255 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:42,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 119 Invalid, 2608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:50:42,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-02-24 02:50:44,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1156. [2022-02-24 02:50:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1087 states have (on average 1.1950321987120516) internal successors, (1299), 1119 states have internal predecessors, (1299), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (46), 15 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-24 02:50:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1393 transitions. [2022-02-24 02:50:44,551 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1393 transitions. Word has length 69 [2022-02-24 02:50:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:44,551 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 1393 transitions. [2022-02-24 02:50:44,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:50:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1393 transitions. [2022-02-24 02:50:44,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:50:44,553 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:44,553 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:44,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-24 02:50:44,553 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:44,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:44,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1053663758, now seen corresponding path program 20 times [2022-02-24 02:50:44,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:44,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969877004] [2022-02-24 02:50:44,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:44,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:44,557 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:44,557 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:45,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:45,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 02:50:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:45,115 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:45,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969877004] [2022-02-24 02:50:45,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [969877004] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:45,115 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:45,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 02:50:45,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113878180] [2022-02-24 02:50:45,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:45,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 02:50:45,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:45,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 02:50:45,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:50:45,116 INFO L87 Difference]: Start difference. First operand 1156 states and 1393 transitions. Second operand has 31 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:50:49,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:49,355 INFO L93 Difference]: Finished difference Result 1291 states and 1553 transitions. [2022-02-24 02:50:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 02:50:49,355 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-24 02:50:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:49,357 INFO L225 Difference]: With dead ends: 1291 [2022-02-24 02:50:49,357 INFO L226 Difference]: Without dead ends: 1289 [2022-02-24 02:50:49,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=463, Invalid=4793, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 02:50:49,358 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 187 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 2738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:49,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 136 Invalid, 2738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:50:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-02-24 02:50:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1156. [2022-02-24 02:50:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1087 states have (on average 1.1950321987120516) internal successors, (1299), 1119 states have internal predecessors, (1299), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (46), 15 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-24 02:50:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1393 transitions. [2022-02-24 02:50:51,309 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1393 transitions. Word has length 69 [2022-02-24 02:50:51,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:51,309 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 1393 transitions. [2022-02-24 02:50:51,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:50:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1393 transitions. [2022-02-24 02:50:51,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:50:51,311 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:51,311 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:51,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-24 02:50:51,311 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:51,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:51,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1944728152, now seen corresponding path program 21 times [2022-02-24 02:50:51,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:51,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186662811] [2022-02-24 02:50:51,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:51,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:51,314 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:51,314 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:52,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:52,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 02:50:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:52,082 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:52,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186662811] [2022-02-24 02:50:52,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1186662811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:52,083 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:52,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 02:50:52,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809591967] [2022-02-24 02:50:52,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:52,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 02:50:52,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:52,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 02:50:52,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 02:50:52,084 INFO L87 Difference]: Start difference. First operand 1156 states and 1393 transitions. Second operand has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:50:56,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:56,848 INFO L93 Difference]: Finished difference Result 1280 states and 1542 transitions. [2022-02-24 02:50:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 02:50:56,848 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-24 02:50:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:56,851 INFO L225 Difference]: With dead ends: 1280 [2022-02-24 02:50:56,851 INFO L226 Difference]: Without dead ends: 1278 [2022-02-24 02:50:56,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=808, Invalid=5998, Unknown=0, NotChecked=0, Total=6806 [2022-02-24 02:50:56,851 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 218 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2344 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:56,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 129 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2344 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:50:56,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2022-02-24 02:50:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1162. [2022-02-24 02:50:58,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1094 states have (on average 1.1974405850091407) internal successors, (1310), 1125 states have internal predecessors, (1310), 47 states have call successors, (47), 21 states have call predecessors, (47), 20 states have return successors, (45), 15 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-24 02:50:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1402 transitions. [2022-02-24 02:50:58,744 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1402 transitions. Word has length 69 [2022-02-24 02:50:58,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:58,744 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1402 transitions. [2022-02-24 02:50:58,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:50:58,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1402 transitions. [2022-02-24 02:50:58,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 02:50:58,746 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:58,746 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:58,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-24 02:50:58,746 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:58,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:58,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1004222264, now seen corresponding path program 20 times [2022-02-24 02:50:58,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:58,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318997196] [2022-02-24 02:50:58,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:58,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:58,749 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:58,749 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:59,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:59,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 02:50:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:59,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 02:50:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:59,025 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:59,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318997196] [2022-02-24 02:50:59,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [318997196] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:59,025 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:59,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 02:50:59,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438134568] [2022-02-24 02:50:59,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:59,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 02:50:59,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:59,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 02:50:59,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:50:59,026 INFO L87 Difference]: Start difference. First operand 1162 states and 1402 transitions. Second operand has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:51:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:51:02,827 INFO L93 Difference]: Finished difference Result 1288 states and 1552 transitions. [2022-02-24 02:51:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 02:51:02,827 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2022-02-24 02:51:02,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:51:02,829 INFO L225 Difference]: With dead ends: 1288 [2022-02-24 02:51:02,829 INFO L226 Difference]: Without dead ends: 1286 [2022-02-24 02:51:02,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=431, Invalid=3351, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 02:51:02,830 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 253 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:51:02,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 82 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:51:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2022-02-24 02:51:04,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1197. [2022-02-24 02:51:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1123 states have (on average 1.1932324131789849) internal successors, (1340), 1158 states have internal predecessors, (1340), 53 states have call successors, (53), 21 states have call predecessors, (53), 20 states have return successors, (51), 17 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-24 02:51:04,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1444 transitions. [2022-02-24 02:51:04,898 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1444 transitions. Word has length 71 [2022-02-24 02:51:04,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:04,899 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 1444 transitions. [2022-02-24 02:51:04,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:51:04,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1444 transitions. [2022-02-24 02:51:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 02:51:04,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:04,900 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:51:04,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-24 02:51:04,900 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:04,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:04,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2022160008, now seen corresponding path program 21 times [2022-02-24 02:51:04,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:04,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990927709] [2022-02-24 02:51:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:04,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:04,903 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:51:04,904 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:51:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:05,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:51:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:05,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 02:51:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:05,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 02:51:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:51:05,478 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:51:05,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990927709] [2022-02-24 02:51:05,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [990927709] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:51:05,478 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:51:05,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 02:51:05,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890489136] [2022-02-24 02:51:05,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:51:05,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 02:51:05,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:51:05,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 02:51:05,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:51:05,479 INFO L87 Difference]: Start difference. First operand 1197 states and 1444 transitions. Second operand has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:51:09,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:51:09,679 INFO L93 Difference]: Finished difference Result 1303 states and 1570 transitions. [2022-02-24 02:51:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 02:51:09,680 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2022-02-24 02:51:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:51:09,682 INFO L225 Difference]: With dead ends: 1303 [2022-02-24 02:51:09,682 INFO L226 Difference]: Without dead ends: 1301 [2022-02-24 02:51:09,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=534, Invalid=4158, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 02:51:09,682 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 232 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:51:09,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 109 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1987 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:51:09,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2022-02-24 02:51:11,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1267. [2022-02-24 02:51:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1187 states have (on average 1.18955349620893) internal successors, (1412), 1224 states have internal predecessors, (1412), 58 states have call successors, (58), 22 states have call predecessors, (58), 21 states have return successors, (56), 20 states have call predecessors, (56), 56 states have call successors, (56) [2022-02-24 02:51:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 1526 transitions. [2022-02-24 02:51:11,956 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 1526 transitions. Word has length 71 [2022-02-24 02:51:11,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:11,956 INFO L470 AbstractCegarLoop]: Abstraction has 1267 states and 1526 transitions. [2022-02-24 02:51:11,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:51:11,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 1526 transitions. [2022-02-24 02:51:11,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:51:11,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:11,957 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:51:11,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-24 02:51:11,958 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:11,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:11,958 INFO L85 PathProgramCache]: Analyzing trace with hash 353640872, now seen corresponding path program 27 times [2022-02-24 02:51:11,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:11,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78518577] [2022-02-24 02:51:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:11,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:11,961 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:51:11,961 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:51:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:12,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:51:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:51:12,164 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:51:12,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78518577] [2022-02-24 02:51:12,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [78518577] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:51:12,164 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:51:12,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:51:12,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979949441] [2022-02-24 02:51:12,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:51:12,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:51:12,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:51:12,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:51:12,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:51:12,165 INFO L87 Difference]: Start difference. First operand 1267 states and 1526 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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) [2022-02-24 02:51:17,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:51:17,181 INFO L93 Difference]: Finished difference Result 2489 states and 3075 transitions. [2022-02-24 02:51:17,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 02:51:17,182 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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 69 [2022-02-24 02:51:17,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:51:17,185 INFO L225 Difference]: With dead ends: 2489 [2022-02-24 02:51:17,185 INFO L226 Difference]: Without dead ends: 2189 [2022-02-24 02:51:17,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=362, Invalid=1278, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 02:51:17,186 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 841 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:51:17,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 119 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:51:17,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2022-02-24 02:51:20,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 1781. [2022-02-24 02:51:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1701 states have (on average 1.207524985302763) internal successors, (2054), 1738 states have internal predecessors, (2054), 58 states have call successors, (58), 22 states have call predecessors, (58), 21 states have return successors, (56), 20 states have call predecessors, (56), 56 states have call successors, (56) [2022-02-24 02:51:20,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 2168 transitions. [2022-02-24 02:51:20,121 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 2168 transitions. Word has length 69 [2022-02-24 02:51:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:20,121 INFO L470 AbstractCegarLoop]: Abstraction has 1781 states and 2168 transitions. [2022-02-24 02:51:20,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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) [2022-02-24 02:51:20,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 2168 transitions. [2022-02-24 02:51:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:51:20,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:20,123 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:51:20,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-02-24 02:51:20,124 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:20,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:20,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1795844299, now seen corresponding path program 28 times [2022-02-24 02:51:20,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:20,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432263986] [2022-02-24 02:51:20,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:20,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:20,127 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:51:20,127 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:51:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:20,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:51:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:51:20,400 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:51:20,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432263986] [2022-02-24 02:51:20,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [432263986] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:51:20,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:51:20,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:51:20,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024924608] [2022-02-24 02:51:20,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:51:20,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:51:20,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:51:20,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:51:20,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:51:20,401 INFO L87 Difference]: Start difference. First operand 1781 states and 2168 transitions. Second operand has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:51:26,448 INFO L93 Difference]: Finished difference Result 2244 states and 2750 transitions. [2022-02-24 02:51:26,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-24 02:51:26,449 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 02:51:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:51:26,452 INFO L225 Difference]: With dead ends: 2244 [2022-02-24 02:51:26,452 INFO L226 Difference]: Without dead ends: 2242 [2022-02-24 02:51:26,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3349 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2299, Invalid=7013, Unknown=0, NotChecked=0, Total=9312 [2022-02-24 02:51:26,453 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 347 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:51:26,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 62 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:51:26,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2022-02-24 02:51:29,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1873. [2022-02-24 02:51:29,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1793 states have (on average 1.2141662018962633) internal successors, (2177), 1830 states have internal predecessors, (2177), 58 states have call successors, (58), 22 states have call predecessors, (58), 21 states have return successors, (56), 20 states have call predecessors, (56), 56 states have call successors, (56) [2022-02-24 02:51:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 2291 transitions. [2022-02-24 02:51:29,508 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 2291 transitions. Word has length 69 [2022-02-24 02:51:29,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:29,508 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 2291 transitions. [2022-02-24 02:51:29,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:29,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 2291 transitions. [2022-02-24 02:51:29,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:51:29,510 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:29,510 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:51:29,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-02-24 02:51:29,511 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:29,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:29,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1094779721, now seen corresponding path program 23 times [2022-02-24 02:51:29,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:29,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907823635] [2022-02-24 02:51:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:29,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:29,514 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:51:29,514 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:51:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:29,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:51:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:51:29,601 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:51:29,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907823635] [2022-02-24 02:51:29,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1907823635] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:51:29,601 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:51:29,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:51:29,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644940032] [2022-02-24 02:51:29,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:51:29,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:51:29,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:51:29,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:51:29,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:51:29,602 INFO L87 Difference]: Start difference. First operand 1873 states and 2291 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:33,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:51:33,960 INFO L93 Difference]: Finished difference Result 2122 states and 2598 transitions. [2022-02-24 02:51:33,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 02:51:33,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 02:51:33,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:51:33,963 INFO L225 Difference]: With dead ends: 2122 [2022-02-24 02:51:33,963 INFO L226 Difference]: Without dead ends: 2089 [2022-02-24 02:51:33,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=655, Invalid=1697, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 02:51:33,964 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 183 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:51:33,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 72 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:51:33,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2022-02-24 02:51:37,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1880. [2022-02-24 02:51:37,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1800 states have (on average 1.2138888888888888) internal successors, (2185), 1837 states have internal predecessors, (2185), 58 states have call successors, (58), 22 states have call predecessors, (58), 21 states have return successors, (56), 20 states have call predecessors, (56), 56 states have call successors, (56) [2022-02-24 02:51:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 2299 transitions. [2022-02-24 02:51:37,024 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 2299 transitions. Word has length 69 [2022-02-24 02:51:37,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:37,024 INFO L470 AbstractCegarLoop]: Abstraction has 1880 states and 2299 transitions. [2022-02-24 02:51:37,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 2299 transitions. [2022-02-24 02:51:37,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:51:37,026 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:37,027 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:51:37,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-02-24 02:51:37,027 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:37,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:37,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2103292271, now seen corresponding path program 29 times [2022-02-24 02:51:37,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:37,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198015596] [2022-02-24 02:51:37,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:37,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:37,030 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:51:37,030 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:51:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:37,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:51:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:51:37,529 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:51:37,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198015596] [2022-02-24 02:51:37,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [198015596] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:51:37,529 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:51:37,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:51:37,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136915211] [2022-02-24 02:51:37,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:51:37,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:51:37,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:51:37,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:51:37,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:51:37,530 INFO L87 Difference]: Start difference. First operand 1880 states and 2299 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:51:43,330 INFO L93 Difference]: Finished difference Result 2084 states and 2537 transitions. [2022-02-24 02:51:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 02:51:43,331 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 02:51:43,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:51:43,333 INFO L225 Difference]: With dead ends: 2084 [2022-02-24 02:51:43,333 INFO L226 Difference]: Without dead ends: 2082 [2022-02-24 02:51:43,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=796, Invalid=5524, Unknown=0, NotChecked=0, Total=6320 [2022-02-24 02:51:43,334 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 338 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:51:43,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 97 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:51:43,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2022-02-24 02:51:46,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1901. [2022-02-24 02:51:46,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1821 states have (on average 1.215266337177375) internal successors, (2213), 1858 states have internal predecessors, (2213), 58 states have call successors, (58), 22 states have call predecessors, (58), 21 states have return successors, (56), 20 states have call predecessors, (56), 56 states have call successors, (56) [2022-02-24 02:51:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 2327 transitions. [2022-02-24 02:51:46,530 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 2327 transitions. Word has length 69 [2022-02-24 02:51:46,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:46,530 INFO L470 AbstractCegarLoop]: Abstraction has 1901 states and 2327 transitions. [2022-02-24 02:51:46,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 2327 transitions. [2022-02-24 02:51:46,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:51:46,532 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:46,532 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:51:46,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-02-24 02:51:46,532 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:46,533 INFO L85 PathProgramCache]: Analyzing trace with hash -671758409, now seen corresponding path program 24 times [2022-02-24 02:51:46,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:46,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636427305] [2022-02-24 02:51:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:46,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:46,535 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:51:46,535 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:51:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:47,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:51:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:51:47,148 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:51:47,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636427305] [2022-02-24 02:51:47,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [636427305] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:51:47,148 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:51:47,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:51:47,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639961385] [2022-02-24 02:51:47,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:51:47,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:51:47,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:51:47,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:51:47,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:51:47,149 INFO L87 Difference]: Start difference. First operand 1901 states and 2327 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:53,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:51:53,995 INFO L93 Difference]: Finished difference Result 2186 states and 2675 transitions. [2022-02-24 02:51:53,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 02:51:53,996 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 02:51:53,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:51:53,999 INFO L225 Difference]: With dead ends: 2186 [2022-02-24 02:51:53,999 INFO L226 Difference]: Without dead ends: 2184 [2022-02-24 02:51:53,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=747, Invalid=6393, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 02:51:53,999 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 389 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 2973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:51:54,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 82 Invalid, 2973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 2672 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 02:51:54,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2022-02-24 02:51:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1913. [2022-02-24 02:51:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1833 states have (on average 1.2160392798690671) internal successors, (2229), 1870 states have internal predecessors, (2229), 58 states have call successors, (58), 22 states have call predecessors, (58), 21 states have return successors, (56), 20 states have call predecessors, (56), 56 states have call successors, (56) [2022-02-24 02:51:57,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 2343 transitions. [2022-02-24 02:51:57,170 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 2343 transitions. Word has length 69 [2022-02-24 02:51:57,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:57,170 INFO L470 AbstractCegarLoop]: Abstraction has 1913 states and 2343 transitions. [2022-02-24 02:51:57,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:57,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 2343 transitions. [2022-02-24 02:51:57,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:51:57,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:57,173 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:51:57,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-02-24 02:51:57,173 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:57,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:57,173 INFO L85 PathProgramCache]: Analyzing trace with hash 194554805, now seen corresponding path program 30 times [2022-02-24 02:51:57,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:57,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376424773] [2022-02-24 02:51:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:57,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:57,176 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:51:57,176 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:51:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:57,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:51:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:51:57,778 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:51:57,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376424773] [2022-02-24 02:51:57,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1376424773] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:51:57,778 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:51:57,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 02:51:57,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779639773] [2022-02-24 02:51:57,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:51:57,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 02:51:57,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:51:57,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 02:51:57,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:51:57,779 INFO L87 Difference]: Start difference. First operand 1913 states and 2343 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:52:05,023 INFO L93 Difference]: Finished difference Result 2346 states and 2861 transitions. [2022-02-24 02:52:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-24 02:52:05,024 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 02:52:05,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:52:05,027 INFO L225 Difference]: With dead ends: 2346 [2022-02-24 02:52:05,028 INFO L226 Difference]: Without dead ends: 2291 [2022-02-24 02:52:05,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=955, Invalid=8165, Unknown=0, NotChecked=0, Total=9120 [2022-02-24 02:52:05,028 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 364 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3617 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 3850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 3617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:52:05,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 133 Invalid, 3850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 3617 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 02:52:05,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-02-24 02:52:08,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1978. [2022-02-24 02:52:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1896 states have (on average 1.2183544303797469) internal successors, (2310), 1934 states have internal predecessors, (2310), 59 states have call successors, (59), 23 states have call predecessors, (59), 22 states have return successors, (57), 20 states have call predecessors, (57), 57 states have call successors, (57) [2022-02-24 02:52:08,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2426 transitions. [2022-02-24 02:52:08,361 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2426 transitions. Word has length 69 [2022-02-24 02:52:08,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:52:08,361 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2426 transitions. [2022-02-24 02:52:08,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:08,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2426 transitions. [2022-02-24 02:52:08,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:52:08,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:52:08,364 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:52:08,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-02-24 02:52:08,364 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:52:08,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:52:08,364 INFO L85 PathProgramCache]: Analyzing trace with hash -643408281, now seen corresponding path program 25 times [2022-02-24 02:52:08,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:52:08,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681010002] [2022-02-24 02:52:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:52:08,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:52:08,367 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:52:08,367 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:52:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:08,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:52:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:52:08,872 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:52:08,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681010002] [2022-02-24 02:52:08,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1681010002] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:52:08,873 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:52:08,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:52:08,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428418540] [2022-02-24 02:52:08,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:52:08,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:52:08,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:52:08,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:52:08,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:52:08,873 INFO L87 Difference]: Start difference. First operand 1978 states and 2426 transitions. Second operand has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:52:14,138 INFO L93 Difference]: Finished difference Result 2133 states and 2612 transitions. [2022-02-24 02:52:14,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 02:52:14,138 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 02:52:14,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:52:14,141 INFO L225 Difference]: With dead ends: 2133 [2022-02-24 02:52:14,141 INFO L226 Difference]: Without dead ends: 2131 [2022-02-24 02:52:14,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=685, Invalid=4007, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 02:52:14,142 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 260 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:52:14,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 96 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:52:14,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2022-02-24 02:52:17,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 2042. [2022-02-24 02:52:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 1955 states have (on average 1.2189258312020461) internal successors, (2383), 1996 states have internal predecessors, (2383), 62 states have call successors, (62), 25 states have call predecessors, (62), 24 states have return successors, (60), 20 states have call predecessors, (60), 60 states have call successors, (60) [2022-02-24 02:52:17,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 2505 transitions. [2022-02-24 02:52:17,553 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 2505 transitions. Word has length 69 [2022-02-24 02:52:17,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:52:17,553 INFO L470 AbstractCegarLoop]: Abstraction has 2042 states and 2505 transitions. [2022-02-24 02:52:17,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:17,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 2505 transitions. [2022-02-24 02:52:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:52:17,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:52:17,555 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:52:17,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-02-24 02:52:17,555 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:52:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:52:17,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1830111059, now seen corresponding path program 26 times [2022-02-24 02:52:17,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:52:17,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42313344] [2022-02-24 02:52:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:52:17,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:52:17,558 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:52:17,558 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:52:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:18,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:52:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:52:18,038 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:52:18,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42313344] [2022-02-24 02:52:18,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [42313344] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:52:18,039 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:52:18,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 02:52:18,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864997600] [2022-02-24 02:52:18,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:52:18,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 02:52:18,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:52:18,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 02:52:18,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:52:18,039 INFO L87 Difference]: Start difference. First operand 2042 states and 2505 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:23,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:52:23,282 INFO L93 Difference]: Finished difference Result 2194 states and 2685 transitions. [2022-02-24 02:52:23,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 02:52:23,283 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 02:52:23,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:52:23,286 INFO L225 Difference]: With dead ends: 2194 [2022-02-24 02:52:23,286 INFO L226 Difference]: Without dead ends: 2192 [2022-02-24 02:52:23,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=737, Invalid=4093, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 02:52:23,286 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 252 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:52:23,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 105 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:52:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2022-02-24 02:52:26,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 2031. [2022-02-24 02:52:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1944 states have (on average 1.2186213991769548) internal successors, (2369), 1984 states have internal predecessors, (2369), 61 states have call successors, (61), 26 states have call predecessors, (61), 25 states have return successors, (59), 20 states have call predecessors, (59), 59 states have call successors, (59) [2022-02-24 02:52:26,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2489 transitions. [2022-02-24 02:52:26,722 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2489 transitions. Word has length 69 [2022-02-24 02:52:26,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:52:26,722 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 2489 transitions. [2022-02-24 02:52:26,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2489 transitions. [2022-02-24 02:52:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:52:26,725 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:52:26,725 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:52:26,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-02-24 02:52:26,725 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:52:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:52:26,725 INFO L85 PathProgramCache]: Analyzing trace with hash -141333981, now seen corresponding path program 31 times [2022-02-24 02:52:26,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:52:26,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692303197] [2022-02-24 02:52:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:52:26,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:52:26,728 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:52:26,728 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:52:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:27,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:52:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:52:27,469 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:52:27,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692303197] [2022-02-24 02:52:27,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [692303197] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:52:27,469 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:52:27,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 02:52:27,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822480693] [2022-02-24 02:52:27,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:52:27,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 02:52:27,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:52:27,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 02:52:27,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:52:27,470 INFO L87 Difference]: Start difference. First operand 2031 states and 2489 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:52:34,288 INFO L93 Difference]: Finished difference Result 2387 states and 2920 transitions. [2022-02-24 02:52:34,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 02:52:34,288 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 02:52:34,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:52:34,291 INFO L225 Difference]: With dead ends: 2387 [2022-02-24 02:52:34,291 INFO L226 Difference]: Without dead ends: 2385 [2022-02-24 02:52:34,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=688, Invalid=6284, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 02:52:34,292 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 271 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3178 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 3362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 3178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:52:34,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 116 Invalid, 3362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 3178 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 02:52:34,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2022-02-24 02:52:37,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2130. [2022-02-24 02:52:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 2036 states have (on average 1.219548133595285) internal successors, (2483), 2080 states have internal predecessors, (2483), 65 states have call successors, (65), 29 states have call predecessors, (65), 28 states have return successors, (63), 20 states have call predecessors, (63), 63 states have call successors, (63) [2022-02-24 02:52:37,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 2611 transitions. [2022-02-24 02:52:37,876 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 2611 transitions. Word has length 69 [2022-02-24 02:52:37,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:52:37,876 INFO L470 AbstractCegarLoop]: Abstraction has 2130 states and 2611 transitions. [2022-02-24 02:52:37,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:37,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 2611 transitions. [2022-02-24 02:52:37,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:52:37,879 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:52:37,879 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:52:37,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-02-24 02:52:37,879 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:52:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:52:37,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1309954697, now seen corresponding path program 27 times [2022-02-24 02:52:37,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:52:37,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955520858] [2022-02-24 02:52:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:52:37,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:52:37,882 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:52:37,882 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:52:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:38,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:52:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:52:38,714 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:52:38,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955520858] [2022-02-24 02:52:38,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1955520858] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:52:38,714 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:52:38,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 02:52:38,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666761686] [2022-02-24 02:52:38,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:52:38,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 02:52:38,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:52:38,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 02:52:38,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 02:52:38,715 INFO L87 Difference]: Start difference. First operand 2130 states and 2611 transitions. Second operand has 33 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:45,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:52:45,878 INFO L93 Difference]: Finished difference Result 2429 states and 2973 transitions. [2022-02-24 02:52:45,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-24 02:52:45,878 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 02:52:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:52:45,881 INFO L225 Difference]: With dead ends: 2429 [2022-02-24 02:52:45,881 INFO L226 Difference]: Without dead ends: 2427 [2022-02-24 02:52:45,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=784, Invalid=7588, Unknown=0, NotChecked=0, Total=8372 [2022-02-24 02:52:45,882 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 288 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3189 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 3372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 3189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:52:45,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 137 Invalid, 3372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 3189 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 02:52:45,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2022-02-24 02:52:49,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2203. [2022-02-24 02:52:49,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2103 states have (on average 1.2201616737993344) internal successors, (2566), 2152 states have internal predecessors, (2566), 70 states have call successors, (70), 30 states have call predecessors, (70), 29 states have return successors, (68), 20 states have call predecessors, (68), 68 states have call successors, (68) [2022-02-24 02:52:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 2704 transitions. [2022-02-24 02:52:49,615 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 2704 transitions. Word has length 69 [2022-02-24 02:52:49,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:52:49,615 INFO L470 AbstractCegarLoop]: Abstraction has 2203 states and 2704 transitions. [2022-02-24 02:52:49,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:49,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 2704 transitions. [2022-02-24 02:52:49,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:52:49,617 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:52:49,617 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:52:49,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-02-24 02:52:49,617 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:52:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:52:49,618 INFO L85 PathProgramCache]: Analyzing trace with hash 2085009899, now seen corresponding path program 28 times [2022-02-24 02:52:49,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:52:49,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834560784] [2022-02-24 02:52:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:52:49,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:52:49,621 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:52:49,621 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:52:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:50,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:52:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:52:50,328 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:52:50,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834560784] [2022-02-24 02:52:50,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1834560784] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:52:50,328 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:52:50,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 02:52:50,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601652158] [2022-02-24 02:52:50,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:52:50,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 02:52:50,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:52:50,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 02:52:50,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:52:50,329 INFO L87 Difference]: Start difference. First operand 2203 states and 2704 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:56,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:52:56,826 INFO L93 Difference]: Finished difference Result 2453 states and 3004 transitions. [2022-02-24 02:52:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-24 02:52:56,827 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 02:52:56,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:52:56,830 INFO L225 Difference]: With dead ends: 2453 [2022-02-24 02:52:56,830 INFO L226 Difference]: Without dead ends: 2451 [2022-02-24 02:52:56,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=630, Invalid=4920, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 02:52:56,831 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 301 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:52:56,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 111 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:52:56,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-02-24 02:53:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2231. [2022-02-24 02:53:00,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2130 states have (on average 1.2211267605633802) internal successors, (2601), 2179 states have internal predecessors, (2601), 70 states have call successors, (70), 31 states have call predecessors, (70), 30 states have return successors, (68), 20 states have call predecessors, (68), 68 states have call successors, (68) [2022-02-24 02:53:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 2739 transitions. [2022-02-24 02:53:00,676 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 2739 transitions. Word has length 69 [2022-02-24 02:53:00,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:53:00,677 INFO L470 AbstractCegarLoop]: Abstraction has 2231 states and 2739 transitions. [2022-02-24 02:53:00,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:00,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 2739 transitions. [2022-02-24 02:53:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:53:00,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:53:00,679 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:53:00,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-02-24 02:53:00,679 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:53:00,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:53:00,679 INFO L85 PathProgramCache]: Analyzing trace with hash 898307121, now seen corresponding path program 29 times [2022-02-24 02:53:00,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:53:00,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330075369] [2022-02-24 02:53:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:53:00,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:53:00,682 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:53:00,682 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:53:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:01,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:53:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:53:01,599 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:53:01,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330075369] [2022-02-24 02:53:01,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [330075369] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:53:01,599 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:53:01,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 02:53:01,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549922124] [2022-02-24 02:53:01,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:53:01,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 02:53:01,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:53:01,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 02:53:01,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:53:01,600 INFO L87 Difference]: Start difference. First operand 2231 states and 2739 transitions. Second operand has 36 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:53:08,638 INFO L93 Difference]: Finished difference Result 2523 states and 3082 transitions. [2022-02-24 02:53:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 02:53:08,638 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 02:53:08,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:53:08,641 INFO L225 Difference]: With dead ends: 2523 [2022-02-24 02:53:08,641 INFO L226 Difference]: Without dead ends: 2521 [2022-02-24 02:53:08,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2032 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=765, Invalid=6717, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 02:53:08,642 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 325 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:53:08,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 107 Invalid, 2757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:53:08,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2022-02-24 02:53:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2238. [2022-02-24 02:53:12,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2137 states have (on average 1.2208703790360318) internal successors, (2609), 2185 states have internal predecessors, (2609), 69 states have call successors, (69), 32 states have call predecessors, (69), 31 states have return successors, (67), 20 states have call predecessors, (67), 67 states have call successors, (67) [2022-02-24 02:53:12,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 2745 transitions. [2022-02-24 02:53:12,463 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 2745 transitions. Word has length 69 [2022-02-24 02:53:12,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:53:12,463 INFO L470 AbstractCegarLoop]: Abstraction has 2238 states and 2745 transitions. [2022-02-24 02:53:12,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:12,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 2745 transitions. [2022-02-24 02:53:12,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:53:12,466 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:53:12,466 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:53:12,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-02-24 02:53:12,466 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:53:12,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:53:12,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1869063899, now seen corresponding path program 30 times [2022-02-24 02:53:12,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:53:12,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141608728] [2022-02-24 02:53:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:53:12,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:53:12,469 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:53:12,469 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:53:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:13,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:53:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:53:13,086 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:53:13,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141608728] [2022-02-24 02:53:13,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1141608728] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:53:13,087 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:53:13,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 02:53:13,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622192392] [2022-02-24 02:53:13,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:53:13,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 02:53:13,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:53:13,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 02:53:13,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:53:13,087 INFO L87 Difference]: Start difference. First operand 2238 states and 2745 transitions. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:20,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:53:20,354 INFO L93 Difference]: Finished difference Result 2528 states and 3094 transitions. [2022-02-24 02:53:20,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-24 02:53:20,355 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 02:53:20,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:53:20,358 INFO L225 Difference]: With dead ends: 2528 [2022-02-24 02:53:20,358 INFO L226 Difference]: Without dead ends: 2526 [2022-02-24 02:53:20,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2271 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=750, Invalid=6732, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 02:53:20,359 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 196 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 2886 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 3080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 2886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:53:20,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 132 Invalid, 3080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 2886 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 02:53:20,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2526 states. [2022-02-24 02:53:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2526 to 2171. [2022-02-24 02:53:24,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2074 states have (on average 1.220347155255545) internal successors, (2531), 2119 states have internal predecessors, (2531), 66 states have call successors, (66), 31 states have call predecessors, (66), 30 states have return successors, (64), 20 states have call predecessors, (64), 64 states have call successors, (64) [2022-02-24 02:53:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 2661 transitions. [2022-02-24 02:53:24,104 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 2661 transitions. Word has length 69 [2022-02-24 02:53:24,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:53:24,104 INFO L470 AbstractCegarLoop]: Abstraction has 2171 states and 2661 transitions. [2022-02-24 02:53:24,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:24,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 2661 transitions. [2022-02-24 02:53:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:53:24,106 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:53:24,106 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:53:24,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-02-24 02:53:24,106 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:53:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:53:24,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1475670698, now seen corresponding path program 22 times [2022-02-24 02:53:24,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:53:24,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124500912] [2022-02-24 02:53:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:53:24,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:53:24,110 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:53:24,110 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:53:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:24,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:53:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:24,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-24 02:53:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:24,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-24 02:53:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:53:24,890 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:53:24,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124500912] [2022-02-24 02:53:24,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1124500912] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:53:24,890 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:53:24,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 02:53:24,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105735390] [2022-02-24 02:53:24,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:53:24,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 02:53:24,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:53:24,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 02:53:24,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:53:24,891 INFO L87 Difference]: Start difference. First operand 2171 states and 2661 transitions. Second operand has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:53:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:53:30,133 INFO L93 Difference]: Finished difference Result 2218 states and 2712 transitions. [2022-02-24 02:53:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 02:53:30,133 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2022-02-24 02:53:30,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:53:30,136 INFO L225 Difference]: With dead ends: 2218 [2022-02-24 02:53:30,136 INFO L226 Difference]: Without dead ends: 2198 [2022-02-24 02:53:30,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=476, Invalid=4636, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 02:53:30,137 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 149 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:53:30,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 94 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1847 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:53:30,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2198 states. [2022-02-24 02:53:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2198 to 2162. [2022-02-24 02:53:33,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2065 states have (on average 1.219370460048426) internal successors, (2518), 2110 states have internal predecessors, (2518), 66 states have call successors, (66), 31 states have call predecessors, (66), 30 states have return successors, (64), 20 states have call predecessors, (64), 64 states have call successors, (64) [2022-02-24 02:53:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 2648 transitions. [2022-02-24 02:53:33,840 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 2648 transitions. Word has length 72 [2022-02-24 02:53:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:53:33,840 INFO L470 AbstractCegarLoop]: Abstraction has 2162 states and 2648 transitions. [2022-02-24 02:53:33,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:53:33,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 2648 transitions. [2022-02-24 02:53:33,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:53:33,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:53:33,843 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:53:33,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-02-24 02:53:33,843 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:53:33,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:53:33,843 INFO L85 PathProgramCache]: Analyzing trace with hash -501669198, now seen corresponding path program 9 times [2022-02-24 02:53:33,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:53:33,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336270521] [2022-02-24 02:53:33,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:53:33,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:53:33,846 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:53:33,846 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:53:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:34,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:53:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:34,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 02:53:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:34,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 02:53:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:34,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-24 02:53:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:53:34,181 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:53:34,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336270521] [2022-02-24 02:53:34,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1336270521] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:53:34,181 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:53:34,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 02:53:34,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193844523] [2022-02-24 02:53:34,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:53:34,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 02:53:34,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:53:34,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 02:53:34,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:53:34,182 INFO L87 Difference]: Start difference. First operand 2162 states and 2648 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:53:38,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:53:38,956 INFO L93 Difference]: Finished difference Result 2224 states and 2720 transitions. [2022-02-24 02:53:38,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 02:53:38,957 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 73 [2022-02-24 02:53:38,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:53:38,960 INFO L225 Difference]: With dead ends: 2224 [2022-02-24 02:53:38,960 INFO L226 Difference]: Without dead ends: 2222 [2022-02-24 02:53:38,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 02:53:38,960 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 205 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:53:38,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 64 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:53:38,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2022-02-24 02:53:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 2204. [2022-02-24 02:53:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2096 states have (on average 1.2161259541984732) internal successors, (2549), 2142 states have internal predecessors, (2549), 76 states have call successors, (76), 32 states have call predecessors, (76), 31 states have return successors, (74), 29 states have call predecessors, (74), 74 states have call successors, (74) [2022-02-24 02:53:42,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 2699 transitions. [2022-02-24 02:53:42,967 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 2699 transitions. Word has length 73 [2022-02-24 02:53:42,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:53:42,967 INFO L470 AbstractCegarLoop]: Abstraction has 2204 states and 2699 transitions. [2022-02-24 02:53:42,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:53:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 2699 transitions. [2022-02-24 02:53:42,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 02:53:42,969 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:53:42,970 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:53:42,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-02-24 02:53:42,970 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:53:42,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:53:42,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1791898001, now seen corresponding path program 22 times [2022-02-24 02:53:42,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:53:42,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53289528] [2022-02-24 02:53:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:53:42,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:53:42,973 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:53:42,973 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:53:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:43,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:53:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:43,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 02:53:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:53:43,428 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:53:43,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53289528] [2022-02-24 02:53:43,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [53289528] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:53:43,428 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:53:43,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 02:53:43,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244590799] [2022-02-24 02:53:43,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:53:43,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 02:53:43,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:53:43,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 02:53:43,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-24 02:53:43,438 INFO L87 Difference]: Start difference. First operand 2204 states and 2699 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:53:49,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:53:49,830 INFO L93 Difference]: Finished difference Result 2453 states and 2993 transitions. [2022-02-24 02:53:49,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 02:53:49,830 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-24 02:53:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:53:49,833 INFO L225 Difference]: With dead ends: 2453 [2022-02-24 02:53:49,833 INFO L226 Difference]: Without dead ends: 2451 [2022-02-24 02:53:49,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=444, Invalid=4248, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 02:53:49,834 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 312 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:53:49,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 120 Invalid, 2538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2353 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:53:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-02-24 02:53:53,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2233. [2022-02-24 02:53:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2124 states have (on average 1.216572504708098) internal successors, (2584), 2170 states have internal predecessors, (2584), 76 states have call successors, (76), 33 states have call predecessors, (76), 32 states have return successors, (74), 29 states have call predecessors, (74), 74 states have call successors, (74) [2022-02-24 02:53:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 2734 transitions. [2022-02-24 02:53:53,860 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 2734 transitions. Word has length 71 [2022-02-24 02:53:53,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:53:53,860 INFO L470 AbstractCegarLoop]: Abstraction has 2233 states and 2734 transitions. [2022-02-24 02:53:53,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:53:53,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 2734 transitions. [2022-02-24 02:53:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 02:53:53,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:53:53,862 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:53:53,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-02-24 02:53:53,863 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:53:53,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:53:53,863 INFO L85 PathProgramCache]: Analyzing trace with hash -2027609937, now seen corresponding path program 23 times [2022-02-24 02:53:53,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:53:53,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257762923] [2022-02-24 02:53:53,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:53:53,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:53:53,866 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:53:53,866 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:53:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:54,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:53:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:54,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 02:53:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:53:54,331 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:53:54,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257762923] [2022-02-24 02:53:54,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1257762923] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:53:54,331 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:53:54,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:53:54,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823264041] [2022-02-24 02:53:54,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:53:54,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:53:54,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:53:54,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:53:54,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:53:54,332 INFO L87 Difference]: Start difference. First operand 2233 states and 2734 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:54:00,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:54:00,462 INFO L93 Difference]: Finished difference Result 2414 states and 2948 transitions. [2022-02-24 02:54:00,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 02:54:00,471 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-24 02:54:00,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:54:00,474 INFO L225 Difference]: With dead ends: 2414 [2022-02-24 02:54:00,474 INFO L226 Difference]: Without dead ends: 2412 [2022-02-24 02:54:00,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=3681, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 02:54:00,475 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 327 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2662 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:54:00,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 151 Invalid, 2829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2662 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:54:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2022-02-24 02:54:04,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 2278. [2022-02-24 02:54:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2168 states have (on average 1.2172509225092252) internal successors, (2639), 2214 states have internal predecessors, (2639), 76 states have call successors, (76), 34 states have call predecessors, (76), 33 states have return successors, (74), 29 states have call predecessors, (74), 74 states have call successors, (74) [2022-02-24 02:54:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 2789 transitions. [2022-02-24 02:54:04,595 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 2789 transitions. Word has length 71 [2022-02-24 02:54:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:54:04,595 INFO L470 AbstractCegarLoop]: Abstraction has 2278 states and 2789 transitions. [2022-02-24 02:54:04,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:54:04,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 2789 transitions. [2022-02-24 02:54:04,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 02:54:04,603 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:54:04,604 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:54:04,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-02-24 02:54:04,604 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:54:04,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:54:04,605 INFO L85 PathProgramCache]: Analyzing trace with hash 952313571, now seen corresponding path program 24 times [2022-02-24 02:54:04,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:54:04,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843435412] [2022-02-24 02:54:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:54:04,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:54:04,609 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:54:04,609 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:54:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:05,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:54:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:05,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 02:54:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:54:05,094 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:54:05,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843435412] [2022-02-24 02:54:05,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [843435412] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:54:05,094 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:54:05,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:54:05,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476998128] [2022-02-24 02:54:05,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:54:05,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:54:05,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:54:05,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:54:05,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:54:05,095 INFO L87 Difference]: Start difference. First operand 2278 states and 2789 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:54:12,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:54:12,161 INFO L93 Difference]: Finished difference Result 2506 states and 3061 transitions. [2022-02-24 02:54:12,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-24 02:54:12,161 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-24 02:54:12,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:54:12,164 INFO L225 Difference]: With dead ends: 2506 [2022-02-24 02:54:12,165 INFO L226 Difference]: Without dead ends: 2504 [2022-02-24 02:54:12,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=512, Invalid=4744, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 02:54:12,165 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 252 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 2826 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:54:12,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 158 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2826 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 02:54:12,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2022-02-24 02:54:16,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2321. [2022-02-24 02:54:16,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2210 states have (on average 1.219004524886878) internal successors, (2694), 2256 states have internal predecessors, (2694), 76 states have call successors, (76), 35 states have call predecessors, (76), 34 states have return successors, (74), 29 states have call predecessors, (74), 74 states have call successors, (74) [2022-02-24 02:54:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 2844 transitions. [2022-02-24 02:54:16,763 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 2844 transitions. Word has length 71 [2022-02-24 02:54:16,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:54:16,764 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 2844 transitions. [2022-02-24 02:54:16,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:54:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 2844 transitions. [2022-02-24 02:54:16,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 02:54:16,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:54:16,767 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:54:16,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-02-24 02:54:16,767 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:54:16,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:54:16,767 INFO L85 PathProgramCache]: Analyzing trace with hash 130276137, now seen corresponding path program 25 times [2022-02-24 02:54:16,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:54:16,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776513479] [2022-02-24 02:54:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:54:16,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:54:16,770 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:54:16,770 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:54:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:17,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:54:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:17,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 02:54:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:54:17,313 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:54:17,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776513479] [2022-02-24 02:54:17,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [776513479] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:54:17,313 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:54:17,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 02:54:17,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026301184] [2022-02-24 02:54:17,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:54:17,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 02:54:17,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:54:17,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 02:54:17,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:54:17,314 INFO L87 Difference]: Start difference. First operand 2321 states and 2844 transitions. Second operand has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:54:25,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:54:25,575 INFO L93 Difference]: Finished difference Result 2722 states and 3338 transitions. [2022-02-24 02:54:25,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 02:54:25,576 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-24 02:54:25,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:54:25,579 INFO L225 Difference]: With dead ends: 2722 [2022-02-24 02:54:25,579 INFO L226 Difference]: Without dead ends: 2720 [2022-02-24 02:54:25,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=723, Invalid=4679, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 02:54:25,580 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 386 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 2342 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 2555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:54:25,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 110 Invalid, 2555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2342 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:54:25,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2022-02-24 02:54:30,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2351. [2022-02-24 02:54:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2240 states have (on average 1.2205357142857143) internal successors, (2734), 2286 states have internal predecessors, (2734), 76 states have call successors, (76), 35 states have call predecessors, (76), 34 states have return successors, (74), 29 states have call predecessors, (74), 74 states have call successors, (74) [2022-02-24 02:54:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 2884 transitions. [2022-02-24 02:54:30,065 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 2884 transitions. Word has length 71 [2022-02-24 02:54:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:54:30,065 INFO L470 AbstractCegarLoop]: Abstraction has 2351 states and 2884 transitions. [2022-02-24 02:54:30,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:54:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 2884 transitions. [2022-02-24 02:54:30,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 02:54:30,068 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:54:30,068 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:54:30,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-02-24 02:54:30,068 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:54:30,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:54:30,068 INFO L85 PathProgramCache]: Analyzing trace with hash -945381923, now seen corresponding path program 26 times [2022-02-24 02:54:30,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:54:30,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589481486] [2022-02-24 02:54:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:54:30,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:54:30,073 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:54:30,074 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:54:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:30,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:54:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:30,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 02:54:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:54:30,492 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:54:30,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589481486] [2022-02-24 02:54:30,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [589481486] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:54:30,492 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:54:30,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 02:54:30,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869418781] [2022-02-24 02:54:30,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:54:30,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 02:54:30,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:54:30,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 02:54:30,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-24 02:54:30,493 INFO L87 Difference]: Start difference. First operand 2351 states and 2884 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:54:36,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:54:36,776 INFO L93 Difference]: Finished difference Result 2448 states and 2999 transitions. [2022-02-24 02:54:36,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 02:54:36,779 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-24 02:54:36,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:54:36,783 INFO L225 Difference]: With dead ends: 2448 [2022-02-24 02:54:36,783 INFO L226 Difference]: Without dead ends: 2446 [2022-02-24 02:54:36,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=314, Invalid=2548, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 02:54:36,783 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 160 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:54:36,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 149 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:54:36,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2022-02-24 02:54:41,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2362. [2022-02-24 02:54:41,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2252 states have (on average 1.2215808170515097) internal successors, (2751), 2298 states have internal predecessors, (2751), 75 states have call successors, (75), 35 states have call predecessors, (75), 34 states have return successors, (73), 28 states have call predecessors, (73), 73 states have call successors, (73) [2022-02-24 02:54:41,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 2899 transitions. [2022-02-24 02:54:41,284 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 2899 transitions. Word has length 71 [2022-02-24 02:54:41,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:54:41,284 INFO L470 AbstractCegarLoop]: Abstraction has 2362 states and 2899 transitions. [2022-02-24 02:54:41,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:54:41,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 2899 transitions. [2022-02-24 02:54:41,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 02:54:41,287 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:54:41,287 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:54:41,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-02-24 02:54:41,287 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:54:41,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:54:41,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1767419357, now seen corresponding path program 27 times [2022-02-24 02:54:41,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:54:41,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508212385] [2022-02-24 02:54:41,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:54:41,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:54:41,291 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:54:41,291 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:54:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:41,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:54:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:41,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 02:54:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:54:41,842 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:54:41,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508212385] [2022-02-24 02:54:41,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1508212385] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:54:41,843 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:54:41,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 02:54:41,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440076630] [2022-02-24 02:54:41,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:54:41,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 02:54:41,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:54:41,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 02:54:41,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:54:41,844 INFO L87 Difference]: Start difference. First operand 2362 states and 2899 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:54:48,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:54:48,940 INFO L93 Difference]: Finished difference Result 2540 states and 3104 transitions. [2022-02-24 02:54:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-24 02:54:48,941 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-24 02:54:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:54:48,945 INFO L225 Difference]: With dead ends: 2540 [2022-02-24 02:54:48,945 INFO L226 Difference]: Without dead ends: 2538 [2022-02-24 02:54:48,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=534, Invalid=4868, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 02:54:48,951 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 345 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2426 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:54:48,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 135 Invalid, 2634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2426 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:54:48,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2022-02-24 02:54:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2368. [2022-02-24 02:54:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2258 states have (on average 1.2218777679362267) internal successors, (2759), 2304 states have internal predecessors, (2759), 75 states have call successors, (75), 35 states have call predecessors, (75), 34 states have return successors, (73), 28 states have call predecessors, (73), 73 states have call successors, (73) [2022-02-24 02:54:53,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 2907 transitions. [2022-02-24 02:54:53,609 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 2907 transitions. Word has length 71 [2022-02-24 02:54:53,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:54:53,610 INFO L470 AbstractCegarLoop]: Abstraction has 2368 states and 2907 transitions. [2022-02-24 02:54:53,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:54:53,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 2907 transitions. [2022-02-24 02:54:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:54:53,612 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:54:53,612 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:54:53,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-02-24 02:54:53,612 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:54:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:54:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash 2062115907, now seen corresponding path program 23 times [2022-02-24 02:54:53,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:54:53,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216217323] [2022-02-24 02:54:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:54:53,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:54:53,616 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:54:53,616 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:54:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:54,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:54:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:54,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-24 02:54:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:54:54,470 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:54:54,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216217323] [2022-02-24 02:54:54,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [216217323] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:54:54,470 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:54:54,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 02:54:54,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883411108] [2022-02-24 02:54:54,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:54:54,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 02:54:54,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:54:54,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 02:54:54,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 02:54:54,471 INFO L87 Difference]: Start difference. First operand 2368 states and 2907 transitions. Second operand has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:55:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:55:04,724 INFO L93 Difference]: Finished difference Result 2641 states and 3232 transitions. [2022-02-24 02:55:04,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-24 02:55:04,725 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-24 02:55:04,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:55:04,728 INFO L225 Difference]: With dead ends: 2641 [2022-02-24 02:55:04,728 INFO L226 Difference]: Without dead ends: 2639 [2022-02-24 02:55:04,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5245 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1948, Invalid=13552, Unknown=0, NotChecked=0, Total=15500 [2022-02-24 02:55:04,729 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 364 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 2769 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 2769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:55:04,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 128 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 2769 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 02:55:04,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2022-02-24 02:55:09,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2419. [2022-02-24 02:55:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2304 states have (on average 1.2200520833333333) internal successors, (2811), 2352 states have internal predecessors, (2811), 79 states have call successors, (79), 36 states have call predecessors, (79), 35 states have return successors, (77), 30 states have call predecessors, (77), 77 states have call successors, (77) [2022-02-24 02:55:09,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 2967 transitions. [2022-02-24 02:55:09,632 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 2967 transitions. Word has length 72 [2022-02-24 02:55:09,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:55:09,633 INFO L470 AbstractCegarLoop]: Abstraction has 2419 states and 2967 transitions. [2022-02-24 02:55:09,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:55:09,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 2967 transitions. [2022-02-24 02:55:09,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:55:09,635 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:55:09,635 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:55:09,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-02-24 02:55:09,635 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:55:09,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:55:09,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1824795895, now seen corresponding path program 24 times [2022-02-24 02:55:09,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:55:09,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403985171] [2022-02-24 02:55:09,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:55:09,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:55:09,639 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:55:09,639 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:55:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:10,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:55:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:10,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-24 02:55:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:55:10,373 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:55:10,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403985171] [2022-02-24 02:55:10,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1403985171] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:55:10,374 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:55:10,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 02:55:10,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815092136] [2022-02-24 02:55:10,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:55:10,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 02:55:10,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:55:10,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 02:55:10,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 02:55:10,375 INFO L87 Difference]: Start difference. First operand 2419 states and 2967 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:55:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:55:18,588 INFO L93 Difference]: Finished difference Result 2576 states and 3157 transitions. [2022-02-24 02:55:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 02:55:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-24 02:55:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:55:18,592 INFO L225 Difference]: With dead ends: 2576 [2022-02-24 02:55:18,593 INFO L226 Difference]: Without dead ends: 2574 [2022-02-24 02:55:18,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1168, Invalid=5804, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 02:55:18,593 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 224 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:55:18,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 125 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:55:18,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2022-02-24 02:55:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2422. [2022-02-24 02:55:23,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 2307 states have (on average 1.2201993931512787) internal successors, (2815), 2355 states have internal predecessors, (2815), 79 states have call successors, (79), 36 states have call predecessors, (79), 35 states have return successors, (77), 30 states have call predecessors, (77), 77 states have call successors, (77) [2022-02-24 02:55:23,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 2971 transitions. [2022-02-24 02:55:23,440 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 2971 transitions. Word has length 72 [2022-02-24 02:55:23,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:55:23,440 INFO L470 AbstractCegarLoop]: Abstraction has 2422 states and 2971 transitions. [2022-02-24 02:55:23,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:55:23,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 2971 transitions. [2022-02-24 02:55:23,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:55:23,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:55:23,443 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:55:23,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-02-24 02:55:23,443 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:55:23,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:55:23,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1689804415, now seen corresponding path program 25 times [2022-02-24 02:55:23,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:55:23,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536695699] [2022-02-24 02:55:23,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:55:23,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:55:23,447 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:55:23,447 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:55:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:24,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:55:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:24,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-24 02:55:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:55:24,488 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:55:24,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536695699] [2022-02-24 02:55:24,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1536695699] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:55:24,488 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:55:24,488 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-24 02:55:24,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559877713] [2022-02-24 02:55:24,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:55:24,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 02:55:24,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:55:24,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 02:55:24,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 02:55:24,489 INFO L87 Difference]: Start difference. First operand 2422 states and 2971 transitions. Second operand has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:55:33,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:55:33,372 INFO L93 Difference]: Finished difference Result 2607 states and 3196 transitions. [2022-02-24 02:55:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-24 02:55:33,373 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-24 02:55:33,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:55:33,376 INFO L225 Difference]: With dead ends: 2607 [2022-02-24 02:55:33,376 INFO L226 Difference]: Without dead ends: 2605 [2022-02-24 02:55:33,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3376 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1170, Invalid=9960, Unknown=0, NotChecked=0, Total=11130 [2022-02-24 02:55:33,377 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 280 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2696 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 2696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:55:33,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 125 Invalid, 2946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 2696 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 02:55:33,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2022-02-24 02:55:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 2447. [2022-02-24 02:55:38,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2330 states have (on average 1.2201716738197426) internal successors, (2843), 2379 states have internal predecessors, (2843), 80 states have call successors, (80), 37 states have call predecessors, (80), 36 states have return successors, (78), 30 states have call predecessors, (78), 78 states have call successors, (78) [2022-02-24 02:55:38,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3001 transitions. [2022-02-24 02:55:38,296 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3001 transitions. Word has length 72 [2022-02-24 02:55:38,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:55:38,297 INFO L470 AbstractCegarLoop]: Abstraction has 2447 states and 3001 transitions. [2022-02-24 02:55:38,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:55:38,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3001 transitions. [2022-02-24 02:55:38,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:55:38,299 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:55:38,299 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:55:38,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-02-24 02:55:38,299 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:55:38,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:55:38,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1751714111, now seen corresponding path program 26 times [2022-02-24 02:55:38,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:55:38,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324561280] [2022-02-24 02:55:38,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:55:38,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:55:38,303 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:55:38,303 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:55:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:39,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:55:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:39,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-24 02:55:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:55:39,256 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:55:39,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324561280] [2022-02-24 02:55:39,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1324561280] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:55:39,256 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:55:39,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-24 02:55:39,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356317976] [2022-02-24 02:55:39,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:55:39,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 02:55:39,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:55:39,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 02:55:39,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 02:55:39,257 INFO L87 Difference]: Start difference. First operand 2447 states and 3001 transitions. Second operand has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:55:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:55:47,234 INFO L93 Difference]: Finished difference Result 2551 states and 3127 transitions. [2022-02-24 02:55:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-24 02:55:47,235 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-24 02:55:47,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:55:47,238 INFO L225 Difference]: With dead ends: 2551 [2022-02-24 02:55:47,238 INFO L226 Difference]: Without dead ends: 2549 [2022-02-24 02:55:47,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1072, Invalid=8048, Unknown=0, NotChecked=0, Total=9120 [2022-02-24 02:55:47,239 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 332 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1927 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 1927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:55:47,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 81 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 1927 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:55:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2022-02-24 02:55:52,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2461. [2022-02-24 02:55:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2461 states, 2341 states have (on average 1.2191371208885091) internal successors, (2854), 2391 states have internal predecessors, (2854), 82 states have call successors, (82), 38 states have call predecessors, (82), 37 states have return successors, (80), 31 states have call predecessors, (80), 80 states have call successors, (80) [2022-02-24 02:55:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2461 states to 2461 states and 3016 transitions. [2022-02-24 02:55:52,135 INFO L78 Accepts]: Start accepts. Automaton has 2461 states and 3016 transitions. Word has length 72 [2022-02-24 02:55:52,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:55:52,135 INFO L470 AbstractCegarLoop]: Abstraction has 2461 states and 3016 transitions. [2022-02-24 02:55:52,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:55:52,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2461 states and 3016 transitions. [2022-02-24 02:55:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:55:52,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:55:52,138 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:55:52,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-02-24 02:55:52,138 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:55:52,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:55:52,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2091436369, now seen corresponding path program 27 times [2022-02-24 02:55:52,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:55:52,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725344259] [2022-02-24 02:55:52,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:55:52,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:55:52,143 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:55:52,143 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:55:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:53,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:55:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:53,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-24 02:55:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:55:53,076 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:55:53,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725344259] [2022-02-24 02:55:53,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1725344259] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:55:53,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:55:53,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 02:55:53,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783972726] [2022-02-24 02:55:53,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:55:53,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 02:55:53,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:55:53,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 02:55:53,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:55:53,077 INFO L87 Difference]: Start difference. First operand 2461 states and 3016 transitions. Second operand has 36 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:56:03,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:56:03,591 INFO L93 Difference]: Finished difference Result 2748 states and 3360 transitions. [2022-02-24 02:56:03,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-24 02:56:03,592 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-24 02:56:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:56:03,596 INFO L225 Difference]: With dead ends: 2748 [2022-02-24 02:56:03,596 INFO L226 Difference]: Without dead ends: 2746 [2022-02-24 02:56:03,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1742, Invalid=13020, Unknown=0, NotChecked=0, Total=14762 [2022-02-24 02:56:03,597 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 298 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 3802 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 4122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 3802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:56:03,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 134 Invalid, 4122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 3802 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 02:56:03,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2022-02-24 02:56:08,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2438. [2022-02-24 02:56:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2438 states, 2323 states have (on average 1.2208351269909599) internal successors, (2836), 2371 states have internal predecessors, (2836), 78 states have call successors, (78), 37 states have call predecessors, (78), 36 states have return successors, (76), 29 states have call predecessors, (76), 76 states have call successors, (76) [2022-02-24 02:56:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2990 transitions. [2022-02-24 02:56:08,524 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2990 transitions. Word has length 72 [2022-02-24 02:56:08,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:56:08,524 INFO L470 AbstractCegarLoop]: Abstraction has 2438 states and 2990 transitions. [2022-02-24 02:56:08,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:56:08,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2990 transitions. [2022-02-24 02:56:08,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:56:08,527 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:56:08,527 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:56:08,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-02-24 02:56:08,527 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:56:08,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:56:08,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1311069383, now seen corresponding path program 28 times [2022-02-24 02:56:08,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:56:08,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698868276] [2022-02-24 02:56:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:56:08,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:56:08,531 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:56:08,531 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:56:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:09,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:56:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:09,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-24 02:56:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:56:09,419 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:56:09,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698868276] [2022-02-24 02:56:09,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [698868276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:56:09,419 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:56:09,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 02:56:09,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450098651] [2022-02-24 02:56:09,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:56:09,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 02:56:09,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:56:09,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 02:56:09,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 02:56:09,420 INFO L87 Difference]: Start difference. First operand 2438 states and 2990 transitions. Second operand has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 32 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:56:17,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:56:17,075 INFO L93 Difference]: Finished difference Result 2594 states and 3176 transitions. [2022-02-24 02:56:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 02:56:17,075 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 32 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-24 02:56:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:56:17,078 INFO L225 Difference]: With dead ends: 2594 [2022-02-24 02:56:17,078 INFO L226 Difference]: Without dead ends: 2592 [2022-02-24 02:56:17,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=787, Invalid=6185, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 02:56:17,079 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 172 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:56:17,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 105 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2305 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:56:17,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2022-02-24 02:56:22,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2438. [2022-02-24 02:56:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2438 states, 2323 states have (on average 1.2208351269909599) internal successors, (2836), 2371 states have internal predecessors, (2836), 78 states have call successors, (78), 37 states have call predecessors, (78), 36 states have return successors, (76), 29 states have call predecessors, (76), 76 states have call successors, (76) [2022-02-24 02:56:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2990 transitions. [2022-02-24 02:56:22,086 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2990 transitions. Word has length 72 [2022-02-24 02:56:22,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:56:22,086 INFO L470 AbstractCegarLoop]: Abstraction has 2438 states and 2990 transitions. [2022-02-24 02:56:22,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 32 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:56:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2990 transitions. [2022-02-24 02:56:22,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 02:56:22,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:56:22,089 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:56:22,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-02-24 02:56:22,089 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:56:22,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:56:22,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1383260442, now seen corresponding path program 32 times [2022-02-24 02:56:22,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:56:22,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009288124] [2022-02-24 02:56:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:56:22,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:56:22,093 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:56:22,093 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:56:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:23,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:56:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:56:23,227 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:56:23,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009288124] [2022-02-24 02:56:23,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1009288124] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:56:23,227 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:56:23,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 02:56:23,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328568663] [2022-02-24 02:56:23,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:56:23,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 02:56:23,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:56:23,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 02:56:23,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 02:56:23,228 INFO L87 Difference]: Start difference. First operand 2438 states and 2990 transitions. Second operand has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:56:33,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:56:33,008 INFO L93 Difference]: Finished difference Result 3027 states and 3720 transitions. [2022-02-24 02:56:33,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 02:56:33,008 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-24 02:56:33,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:56:33,012 INFO L225 Difference]: With dead ends: 3027 [2022-02-24 02:56:33,012 INFO L226 Difference]: Without dead ends: 3025 [2022-02-24 02:56:33,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=783, Invalid=5697, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 02:56:33,013 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 646 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 2374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:56:33,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 80 Invalid, 2374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:56:33,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2022-02-24 02:56:38,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 2491. [2022-02-24 02:56:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 2369 states have (on average 1.2199240185732376) internal successors, (2890), 2420 states have internal predecessors, (2890), 81 states have call successors, (81), 41 states have call predecessors, (81), 40 states have return successors, (79), 29 states have call predecessors, (79), 79 states have call successors, (79) [2022-02-24 02:56:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 3050 transitions. [2022-02-24 02:56:38,318 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 3050 transitions. Word has length 71 [2022-02-24 02:56:38,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:56:38,318 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 3050 transitions. [2022-02-24 02:56:38,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:56:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 3050 transitions. [2022-02-24 02:56:38,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 02:56:38,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:56:38,322 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:56:38,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-02-24 02:56:38,322 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:56:38,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:56:38,322 INFO L85 PathProgramCache]: Analyzing trace with hash 538358054, now seen corresponding path program 33 times [2022-02-24 02:56:38,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:56:38,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742592953] [2022-02-24 02:56:38,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:56:38,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:56:38,326 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:56:38,326 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:56:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:38,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:56:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:56:38,863 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:56:38,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742592953] [2022-02-24 02:56:38,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [742592953] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:56:38,863 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:56:38,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 02:56:38,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977823101] [2022-02-24 02:56:38,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:56:38,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 02:56:38,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:56:38,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 02:56:38,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:56:38,864 INFO L87 Difference]: Start difference. First operand 2491 states and 3050 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:56:46,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:56:46,078 INFO L93 Difference]: Finished difference Result 2671 states and 3265 transitions. [2022-02-24 02:56:46,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 02:56:46,078 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-24 02:56:46,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:56:46,082 INFO L225 Difference]: With dead ends: 2671 [2022-02-24 02:56:46,082 INFO L226 Difference]: Without dead ends: 2669 [2022-02-24 02:56:46,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=771, Invalid=3135, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 02:56:46,082 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 182 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:56:46,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 62 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:56:46,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2022-02-24 02:56:50,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2485. [2022-02-24 02:56:50,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2485 states, 2365 states have (on average 1.2202959830866809) internal successors, (2886), 2414 states have internal predecessors, (2886), 79 states have call successors, (79), 41 states have call predecessors, (79), 40 states have return successors, (77), 29 states have call predecessors, (77), 77 states have call successors, (77) [2022-02-24 02:56:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2485 states to 2485 states and 3042 transitions. [2022-02-24 02:56:50,947 INFO L78 Accepts]: Start accepts. Automaton has 2485 states and 3042 transitions. Word has length 71 [2022-02-24 02:56:50,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:56:50,947 INFO L470 AbstractCegarLoop]: Abstraction has 2485 states and 3042 transitions. [2022-02-24 02:56:50,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:56:50,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2485 states and 3042 transitions. [2022-02-24 02:56:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 02:56:50,949 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:56:50,949 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:56:50,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-02-24 02:56:50,950 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:56:50,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:56:50,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1329173350, now seen corresponding path program 34 times [2022-02-24 02:56:50,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:56:50,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859943782] [2022-02-24 02:56:50,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:56:50,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:56:50,953 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:56:50,953 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:56:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:51,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:56:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:56:51,919 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:56:51,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859943782] [2022-02-24 02:56:51,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [859943782] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:56:51,919 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:56:51,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 02:56:51,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396455172] [2022-02-24 02:56:51,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:56:51,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 02:56:51,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:56:51,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 02:56:51,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 02:56:51,920 INFO L87 Difference]: Start difference. First operand 2485 states and 3042 transitions. Second operand has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:56:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:56:59,719 INFO L93 Difference]: Finished difference Result 2648 states and 3236 transitions. [2022-02-24 02:56:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 02:56:59,719 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-24 02:56:59,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:56:59,723 INFO L225 Difference]: With dead ends: 2648 [2022-02-24 02:56:59,723 INFO L226 Difference]: Without dead ends: 2646 [2022-02-24 02:56:59,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=602, Invalid=4368, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 02:56:59,724 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 406 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2280 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 2280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:56:59,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 61 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 2280 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:56:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2022-02-24 02:57:04,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2528. [2022-02-24 02:57:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2404 states have (on average 1.2204658901830283) internal successors, (2934), 2456 states have internal predecessors, (2934), 82 states have call successors, (82), 42 states have call predecessors, (82), 41 states have return successors, (80), 29 states have call predecessors, (80), 80 states have call successors, (80) [2022-02-24 02:57:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 3096 transitions. [2022-02-24 02:57:04,809 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 3096 transitions. Word has length 71 [2022-02-24 02:57:04,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:57:04,809 INFO L470 AbstractCegarLoop]: Abstraction has 2528 states and 3096 transitions. [2022-02-24 02:57:04,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:57:04,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 3096 transitions. [2022-02-24 02:57:04,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 02:57:04,812 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:57:04,812 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:57:04,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-02-24 02:57:04,812 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:57:04,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:57:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash 218298293, now seen corresponding path program 28 times [2022-02-24 02:57:04,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:57:04,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658980266] [2022-02-24 02:57:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:57:04,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:57:04,816 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:57:04,816 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:57:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:05,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:57:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:05,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 02:57:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:05,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 02:57:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:57:05,527 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:57:05,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658980266] [2022-02-24 02:57:05,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [658980266] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:57:05,528 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:57:05,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 02:57:05,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277182817] [2022-02-24 02:57:05,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:57:05,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 02:57:05,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:57:05,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 02:57:05,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:57:05,529 INFO L87 Difference]: Start difference. First operand 2528 states and 3096 transitions. Second operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:57:13,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:57:13,696 INFO L93 Difference]: Finished difference Result 2676 states and 3272 transitions. [2022-02-24 02:57:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 02:57:13,698 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2022-02-24 02:57:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:57:13,702 INFO L225 Difference]: With dead ends: 2676 [2022-02-24 02:57:13,702 INFO L226 Difference]: Without dead ends: 2674 [2022-02-24 02:57:13,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=554, Invalid=5298, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 02:57:13,702 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 261 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 2728 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 2901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 2728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:57:13,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 105 Invalid, 2901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2728 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 02:57:13,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2022-02-24 02:57:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2558. [2022-02-24 02:57:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2558 states, 2432 states have (on average 1.2203947368421053) internal successors, (2968), 2484 states have internal predecessors, (2968), 84 states have call successors, (84), 42 states have call predecessors, (84), 41 states have return successors, (82), 31 states have call predecessors, (82), 82 states have call successors, (82) [2022-02-24 02:57:18,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2558 states to 2558 states and 3134 transitions. [2022-02-24 02:57:18,935 INFO L78 Accepts]: Start accepts. Automaton has 2558 states and 3134 transitions. Word has length 74 [2022-02-24 02:57:18,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:57:18,935 INFO L470 AbstractCegarLoop]: Abstraction has 2558 states and 3134 transitions. [2022-02-24 02:57:18,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:57:18,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2558 states and 3134 transitions. [2022-02-24 02:57:18,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 02:57:18,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:57:18,937 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:57:18,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-02-24 02:57:18,937 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:57:18,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:57:18,938 INFO L85 PathProgramCache]: Analyzing trace with hash 231121153, now seen corresponding path program 29 times [2022-02-24 02:57:18,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:57:18,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738866937] [2022-02-24 02:57:18,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:57:18,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:57:18,941 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:57:18,941 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:57:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:19,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:57:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:19,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 02:57:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:19,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 02:57:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:57:19,578 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:57:19,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738866937] [2022-02-24 02:57:19,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [738866937] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:57:19,578 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:57:19,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 02:57:19,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765455007] [2022-02-24 02:57:19,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:57:19,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 02:57:19,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:57:19,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 02:57:19,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:57:19,579 INFO L87 Difference]: Start difference. First operand 2558 states and 3134 transitions. Second operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:57:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:57:26,880 INFO L93 Difference]: Finished difference Result 2654 states and 3249 transitions. [2022-02-24 02:57:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 02:57:26,881 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2022-02-24 02:57:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:57:26,884 INFO L225 Difference]: With dead ends: 2654 [2022-02-24 02:57:26,884 INFO L226 Difference]: Without dead ends: 2652 [2022-02-24 02:57:26,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=627, Invalid=4629, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 02:57:26,885 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 219 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2040 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 02:57:26,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 120 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2040 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 02:57:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2022-02-24 02:57:31,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2558. [2022-02-24 02:57:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2558 states, 2432 states have (on average 1.2203947368421053) internal successors, (2968), 2484 states have internal predecessors, (2968), 84 states have call successors, (84), 42 states have call predecessors, (84), 41 states have return successors, (82), 31 states have call predecessors, (82), 82 states have call successors, (82) [2022-02-24 02:57:31,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2558 states to 2558 states and 3134 transitions. [2022-02-24 02:57:31,806 INFO L78 Accepts]: Start accepts. Automaton has 2558 states and 3134 transitions. Word has length 74 [2022-02-24 02:57:31,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:57:31,806 INFO L470 AbstractCegarLoop]: Abstraction has 2558 states and 3134 transitions. [2022-02-24 02:57:31,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:57:31,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2558 states and 3134 transitions. [2022-02-24 02:57:31,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:57:31,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:57:31,809 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:57:31,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-02-24 02:57:31,809 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:57:31,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:57:31,809 INFO L85 PathProgramCache]: Analyzing trace with hash -218179534, now seen corresponding path program 31 times [2022-02-24 02:57:31,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:57:31,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686380139] [2022-02-24 02:57:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:57:31,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:57:31,812 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:57:31,813 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:57:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:32,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:57:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:57:32,148 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:57:32,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686380139] [2022-02-24 02:57:32,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1686380139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:57:32,148 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:57:32,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 02:57:32,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393569170] [2022-02-24 02:57:32,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:57:32,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 02:57:32,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:57:32,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 02:57:32,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:57:32,149 INFO L87 Difference]: Start difference. First operand 2558 states and 3134 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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) [2022-02-24 02:57:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:57:45,152 INFO L93 Difference]: Finished difference Result 3343 states and 4098 transitions. [2022-02-24 02:57:45,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-02-24 02:57:45,153 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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 72 [2022-02-24 02:57:45,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:57:45,158 INFO L225 Difference]: With dead ends: 3343 [2022-02-24 02:57:45,158 INFO L226 Difference]: Without dead ends: 3341 [2022-02-24 02:57:45,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9846 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2688, Invalid=23072, Unknown=0, NotChecked=0, Total=25760 [2022-02-24 02:57:45,160 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 604 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 3954 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 4599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 3954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:57:45,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 111 Invalid, 4599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 3954 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 02:57:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2022-02-24 02:57:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 2530. [2022-02-24 02:57:50,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2397 states have (on average 1.2161034626616605) internal successors, (2915), 2454 states have internal predecessors, (2915), 89 states have call successors, (89), 44 states have call predecessors, (89), 43 states have return successors, (87), 31 states have call predecessors, (87), 87 states have call successors, (87) [2022-02-24 02:57:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3091 transitions. [2022-02-24 02:57:50,092 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3091 transitions. Word has length 72 [2022-02-24 02:57:50,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:57:50,092 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 3091 transitions. [2022-02-24 02:57:50,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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) [2022-02-24 02:57:50,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3091 transitions. [2022-02-24 02:57:50,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:57:50,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:57:50,095 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:57:50,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-02-24 02:57:50,095 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:57:50,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:57:50,095 INFO L85 PathProgramCache]: Analyzing trace with hash 867792438, now seen corresponding path program 35 times [2022-02-24 02:57:50,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:57:50,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851420558] [2022-02-24 02:57:50,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:57:50,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:57:50,098 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:57:50,098 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:57:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:50,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:57:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:57:50,685 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:57:50,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851420558] [2022-02-24 02:57:50,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [851420558] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:57:50,685 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:57:50,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 02:57:50,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67870514] [2022-02-24 02:57:50,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:57:50,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 02:57:50,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:57:50,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 02:57:50,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:57:50,686 INFO L87 Difference]: Start difference. First operand 2530 states and 3091 transitions. Second operand has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 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) [2022-02-24 02:57:58,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:57:58,889 INFO L93 Difference]: Finished difference Result 2783 states and 3395 transitions. [2022-02-24 02:57:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-24 02:57:58,889 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 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 72 [2022-02-24 02:57:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:57:58,893 INFO L225 Difference]: With dead ends: 2783 [2022-02-24 02:57:58,893 INFO L226 Difference]: Without dead ends: 2731 [2022-02-24 02:57:58,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=905, Invalid=6927, Unknown=0, NotChecked=0, Total=7832 [2022-02-24 02:57:58,893 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 345 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 2569 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:57:58,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 117 Invalid, 2770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2569 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:57:58,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2022-02-24 02:58:03,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 2539. [2022-02-24 02:58:03,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2539 states, 2404 states have (on average 1.2154742096505824) internal successors, (2922), 2462 states have internal predecessors, (2922), 90 states have call successors, (90), 45 states have call predecessors, (90), 44 states have return successors, (88), 31 states have call predecessors, (88), 88 states have call successors, (88) [2022-02-24 02:58:03,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2539 states to 2539 states and 3100 transitions. [2022-02-24 02:58:03,893 INFO L78 Accepts]: Start accepts. Automaton has 2539 states and 3100 transitions. Word has length 72 [2022-02-24 02:58:03,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:58:03,893 INFO L470 AbstractCegarLoop]: Abstraction has 2539 states and 3100 transitions. [2022-02-24 02:58:03,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 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) [2022-02-24 02:58:03,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2539 states and 3100 transitions. [2022-02-24 02:58:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:58:03,896 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:58:03,896 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:58:03,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-02-24 02:58:03,896 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:58:03,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:58:03,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1258025424, now seen corresponding path program 36 times [2022-02-24 02:58:03,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:58:03,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721672466] [2022-02-24 02:58:03,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:58:03,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:58:03,899 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:58:03,899 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:58:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:04,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:58:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:58:04,751 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:58:04,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721672466] [2022-02-24 02:58:04,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1721672466] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:58:04,751 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:58:04,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 02:58:04,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173858322] [2022-02-24 02:58:04,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:58:04,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 02:58:04,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:58:04,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 02:58:04,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 02:58:04,752 INFO L87 Difference]: Start difference. First operand 2539 states and 3100 transitions. Second operand has 33 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) [2022-02-24 02:58:13,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:58:13,363 INFO L93 Difference]: Finished difference Result 2781 states and 3389 transitions. [2022-02-24 02:58:13,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-24 02:58:13,364 INFO L78 Accepts]: Start accepts. Automaton has has 33 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 72 [2022-02-24 02:58:13,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:58:13,367 INFO L225 Difference]: With dead ends: 2781 [2022-02-24 02:58:13,367 INFO L226 Difference]: Without dead ends: 2779 [2022-02-24 02:58:13,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=739, Invalid=7271, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 02:58:13,368 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 353 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 3283 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 3483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 3283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:58:13,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 136 Invalid, 3483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 3283 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 02:58:13,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2022-02-24 02:58:18,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2545. [2022-02-24 02:58:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 2410 states have (on average 1.2157676348547717) internal successors, (2930), 2468 states have internal predecessors, (2930), 90 states have call successors, (90), 45 states have call predecessors, (90), 44 states have return successors, (88), 31 states have call predecessors, (88), 88 states have call successors, (88) [2022-02-24 02:58:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 3108 transitions. [2022-02-24 02:58:18,362 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 3108 transitions. Word has length 72 [2022-02-24 02:58:18,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:58:18,362 INFO L470 AbstractCegarLoop]: Abstraction has 2545 states and 3108 transitions. [2022-02-24 02:58:18,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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) [2022-02-24 02:58:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 3108 transitions. [2022-02-24 02:58:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 02:58:18,368 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:58:18,369 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:58:18,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-02-24 02:58:18,369 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:58:18,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:58:18,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1382753881, now seen corresponding path program 29 times [2022-02-24 02:58:18,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:58:18,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868886585] [2022-02-24 02:58:18,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:58:18,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:58:18,372 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:58:18,372 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:58:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:19,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:58:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:19,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-24 02:58:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:19,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-24 02:58:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:58:19,211 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:58:19,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868886585] [2022-02-24 02:58:19,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1868886585] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:58:19,211 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:58:19,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 02:58:19,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91791470] [2022-02-24 02:58:19,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:58:19,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 02:58:19,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:58:19,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 02:58:19,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 02:58:19,212 INFO L87 Difference]: Start difference. First operand 2545 states and 3108 transitions. Second operand has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 33 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:58:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:58:25,780 INFO L93 Difference]: Finished difference Result 2602 states and 3170 transitions. [2022-02-24 02:58:25,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 02:58:25,799 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 33 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 75 [2022-02-24 02:58:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:58:25,803 INFO L225 Difference]: With dead ends: 2602 [2022-02-24 02:58:25,803 INFO L226 Difference]: Without dead ends: 2539 [2022-02-24 02:58:25,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=487, Invalid=4625, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 02:58:25,804 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 135 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1756 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:58:25,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 111 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1756 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:58:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states.