/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/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 03:39:08,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 03:39:08,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 03:39:08,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 03:39:08,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 03:39:08,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 03:39:08,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 03:39:08,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 03:39:08,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 03:39:08,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 03:39:08,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 03:39:08,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 03:39:08,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 03:39:08,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 03:39:08,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 03:39:08,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 03:39:08,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-15 03:39:08,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 03:39:08,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 03:39:08,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 03:39:08,338 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 03:39:08,343 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 03:39:08,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 03:39:08,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 03:39:08,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 03:39:08,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 03:39:08,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 03:39:08,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 03:39:08,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 03:39:08,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 03:39:08,344 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 03:39:08,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 03:39:08,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 03:39:08,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 03:39:08,345 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 03:39:08,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 03:39:08,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 03:39:08,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 03:39:08,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 03:39:08,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 03:39:08,346 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 03:39:08,346 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 03:39:08,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 03:39:08,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 03:39:08,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 03:39:08,520 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 03:39:08,521 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 03:39:08,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2022-02-15 03:39:08,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7a82268/a45dd32af8084a0a8d8a8faf2abb955e/FLAG5ead7a959 [2022-02-15 03:39:08,975 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 03:39:08,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2022-02-15 03:39:08,979 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7a82268/a45dd32af8084a0a8d8a8faf2abb955e/FLAG5ead7a959 [2022-02-15 03:39:08,991 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7a82268/a45dd32af8084a0a8d8a8faf2abb955e [2022-02-15 03:39:08,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 03:39:08,994 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 03:39:08,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 03:39:08,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 03:39:08,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 03:39:08,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 03:39:08" (1/1) ... [2022-02-15 03:39:08,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6db66467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:08, skipping insertion in model container [2022-02-15 03:39:08,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 03:39:08" (1/1) ... [2022-02-15 03:39:09,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 03:39:09,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 03:39:09,123 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/vogal-1.i[895,908] [2022-02-15 03:39:09,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 03:39:09,151 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 03:39:09,158 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/vogal-1.i[895,908] [2022-02-15 03:39:09,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 03:39:09,176 INFO L208 MainTranslator]: Completed translation [2022-02-15 03:39:09,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:09 WrapperNode [2022-02-15 03:39:09,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 03:39:09,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 03:39:09,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 03:39:09,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 03:39:09,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:09" (1/1) ... [2022-02-15 03:39:09,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:09" (1/1) ... [2022-02-15 03:39:09,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:09" (1/1) ... [2022-02-15 03:39:09,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:09" (1/1) ... [2022-02-15 03:39:09,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:09" (1/1) ... [2022-02-15 03:39:09,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:09" (1/1) ... [2022-02-15 03:39:09,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:09" (1/1) ... [2022-02-15 03:39:09,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 03:39:09,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 03:39:09,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 03:39:09,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 03:39:09,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:09" (1/1) ... [2022-02-15 03:39:09,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 03:39:09,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 03:39:09,242 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) [2022-02-15 03:39:09,244 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 [2022-02-15 03:39:09,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 03:39:09,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 03:39:09,266 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 03:39:09,266 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 03:39:09,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 03:39:09,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 03:39:09,266 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 03:39:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 03:39:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-15 03:39:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-15 03:39:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 03:39:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 03:39:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 03:39:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 03:39:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-15 03:39:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 03:39:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-15 03:39:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 03:39:09,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 03:39:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 03:39:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 03:39:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 03:39:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 03:39:09,315 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 03:39:09,316 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 03:39:09,467 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 03:39:09,474 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 03:39:09,474 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-02-15 03:39:09,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 03:39:09 BoogieIcfgContainer [2022-02-15 03:39:09,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 03:39:09,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 03:39:09,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 03:39:09,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 03:39:09,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 03:39:08" (1/3) ... [2022-02-15 03:39:09,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191104c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 03:39:09, skipping insertion in model container [2022-02-15 03:39:09,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:39:09" (2/3) ... [2022-02-15 03:39:09,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191104c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 03:39:09, skipping insertion in model container [2022-02-15 03:39:09,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 03:39:09" (3/3) ... [2022-02-15 03:39:09,489 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-02-15 03:39:09,492 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 03:39:09,492 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 03:39:09,519 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 03:39:09,524 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 [2022-02-15 03:39:09,525 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 03:39:09,534 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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) [2022-02-15 03:39:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 03:39:09,539 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:09,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:09,540 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:09,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:09,543 INFO L85 PathProgramCache]: Analyzing trace with hash -366742854, now seen corresponding path program 1 times [2022-02-15 03:39:09,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:09,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796528776] [2022-02-15 03:39:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:09,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:09,592 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:09,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:09,713 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:09,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796528776] [2022-02-15 03:39:09,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1796528776] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:09,715 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:09,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 03:39:09,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972608109] [2022-02-15 03:39:09,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:09,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 03:39:09,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:09,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 03:39:09,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 03:39:09,746 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:09,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:09,803 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2022-02-15 03:39:09,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 03:39:09,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-15 03:39:09,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:09,812 INFO L225 Difference]: With dead ends: 66 [2022-02-15 03:39:09,812 INFO L226 Difference]: Without dead ends: 30 [2022-02-15 03:39:09,815 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 [2022-02-15 03:39:09,818 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 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 [2022-02-15 03:39:09,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 03:39:09,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-15 03:39:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-15 03:39:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-02-15 03:39:09,859 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2022-02-15 03:39:09,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:09,859 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-02-15 03:39:09,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:09,860 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-02-15 03:39:09,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 03:39:09,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:09,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:09,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 03:39:09,862 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:09,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:09,862 INFO L85 PathProgramCache]: Analyzing trace with hash -864138192, now seen corresponding path program 1 times [2022-02-15 03:39:09,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:09,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067165950] [2022-02-15 03:39:09,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:09,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:09,872 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:09,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:09,992 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:09,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067165950] [2022-02-15 03:39:09,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2067165950] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:09,993 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:09,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 03:39:09,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811207037] [2022-02-15 03:39:09,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:09,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 03:39:09,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:09,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 03:39:09,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 03:39:09,994 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:10,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:10,077 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-02-15 03:39:10,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 03:39:10,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-15 03:39:10,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:10,081 INFO L225 Difference]: With dead ends: 67 [2022-02-15 03:39:10,081 INFO L226 Difference]: Without dead ends: 45 [2022-02-15 03:39:10,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 03:39:10,086 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:10,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 35 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:10,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-15 03:39:10,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-02-15 03:39:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-02-15 03:39:10,098 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2022-02-15 03:39:10,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:10,099 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-02-15 03:39:10,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:10,100 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-02-15 03:39:10,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 03:39:10,101 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:10,102 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:10,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 03:39:10,103 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:10,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:10,105 INFO L85 PathProgramCache]: Analyzing trace with hash 32041234, now seen corresponding path program 1 times [2022-02-15 03:39:10,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:10,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74678954] [2022-02-15 03:39:10,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:10,115 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:10,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:10,116 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:10,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:10,223 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:10,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74678954] [2022-02-15 03:39:10,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [74678954] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:10,224 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:10,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 03:39:10,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969845889] [2022-02-15 03:39:10,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:10,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 03:39:10,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:10,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 03:39:10,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 03:39:10,226 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:10,367 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2022-02-15 03:39:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 03:39:10,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-15 03:39:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:10,368 INFO L225 Difference]: With dead ends: 82 [2022-02-15 03:39:10,368 INFO L226 Difference]: Without dead ends: 60 [2022-02-15 03:39:10,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:39:10,369 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 112 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:10,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 35 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:10,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-15 03:39:10,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2022-02-15 03:39:10,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:10,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-02-15 03:39:10,376 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2022-02-15 03:39:10,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:10,377 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-02-15 03:39:10,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:10,377 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-02-15 03:39:10,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 03:39:10,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:10,377 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] [2022-02-15 03:39:10,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 03:39:10,378 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:10,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:10,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2027956876, now seen corresponding path program 2 times [2022-02-15 03:39:10,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:10,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076778357] [2022-02-15 03:39:10,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:10,380 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:10,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:10,382 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:10,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:10,475 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:10,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076778357] [2022-02-15 03:39:10,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1076778357] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:10,476 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:10,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 03:39:10,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165507632] [2022-02-15 03:39:10,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:10,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 03:39:10,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:10,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 03:39:10,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 03:39:10,477 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:10,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:10,647 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2022-02-15 03:39:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 03:39:10,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-15 03:39:10,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:10,650 INFO L225 Difference]: With dead ends: 97 [2022-02-15 03:39:10,651 INFO L226 Difference]: Without dead ends: 75 [2022-02-15 03:39:10,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:39:10,660 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 130 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:10,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 57 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-15 03:39:10,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 35. [2022-02-15 03:39:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:10,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-02-15 03:39:10,670 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 24 [2022-02-15 03:39:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:10,670 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-02-15 03:39:10,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-02-15 03:39:10,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 03:39:10,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:10,671 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:10,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 03:39:10,671 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:10,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:10,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1706217130, now seen corresponding path program 3 times [2022-02-15 03:39:10,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:10,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437570684] [2022-02-15 03:39:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:10,677 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:10,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:10,678 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:10,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:10,782 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:10,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437570684] [2022-02-15 03:39:10,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [437570684] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:10,783 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:10,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 03:39:10,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604699618] [2022-02-15 03:39:10,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:10,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 03:39:10,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:10,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 03:39:10,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:39:10,784 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:11,026 INFO L93 Difference]: Finished difference Result 112 states and 150 transitions. [2022-02-15 03:39:11,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 03:39:11,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-15 03:39:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:11,027 INFO L225 Difference]: With dead ends: 112 [2022-02-15 03:39:11,027 INFO L226 Difference]: Without dead ends: 90 [2022-02-15 03:39:11,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:39:11,028 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 193 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:11,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 64 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:11,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-15 03:39:11,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 37. [2022-02-15 03:39:11,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-02-15 03:39:11,036 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 26 [2022-02-15 03:39:11,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:11,036 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-02-15 03:39:11,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,036 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-02-15 03:39:11,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 03:39:11,037 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:11,037 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:11,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 03:39:11,037 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:11,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:11,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1751966536, now seen corresponding path program 4 times [2022-02-15 03:39:11,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:11,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43022472] [2022-02-15 03:39:11,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:11,039 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:11,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:11,040 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:11,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:11,109 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:11,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43022472] [2022-02-15 03:39:11,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [43022472] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:11,109 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:11,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 03:39:11,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200060557] [2022-02-15 03:39:11,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:11,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 03:39:11,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:11,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 03:39:11,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 03:39:11,110 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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) [2022-02-15 03:39:11,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:11,371 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2022-02-15 03:39:11,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 03:39:11,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 [2022-02-15 03:39:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:11,372 INFO L225 Difference]: With dead ends: 127 [2022-02-15 03:39:11,372 INFO L226 Difference]: Without dead ends: 105 [2022-02-15 03:39:11,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:39:11,373 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 256 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:11,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 71 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:11,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-02-15 03:39:11,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 39. [2022-02-15 03:39:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-02-15 03:39:11,381 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 28 [2022-02-15 03:39:11,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:11,382 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-02-15 03:39:11,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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) [2022-02-15 03:39:11,382 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-02-15 03:39:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 03:39:11,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:11,382 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:11,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 03:39:11,383 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:11,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:11,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1527494554, now seen corresponding path program 5 times [2022-02-15 03:39:11,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:11,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372677840] [2022-02-15 03:39:11,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:11,385 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:11,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:11,386 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:11,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:11,477 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:11,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372677840] [2022-02-15 03:39:11,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1372677840] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:11,477 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:11,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 03:39:11,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249397392] [2022-02-15 03:39:11,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:11,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 03:39:11,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:11,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 03:39:11,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:39:11,479 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:11,587 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-02-15 03:39:11,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 03:39:11,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-15 03:39:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:11,588 INFO L225 Difference]: With dead ends: 63 [2022-02-15 03:39:11,588 INFO L226 Difference]: Without dead ends: 58 [2022-02-15 03:39:11,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:39:11,589 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:11,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 58 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:11,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-15 03:39:11,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-02-15 03:39:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-02-15 03:39:11,599 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 30 [2022-02-15 03:39:11,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:11,599 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-02-15 03:39:11,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,599 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-02-15 03:39:11,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 03:39:11,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:11,600 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:11,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 03:39:11,600 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:11,601 INFO L85 PathProgramCache]: Analyzing trace with hash 810905395, now seen corresponding path program 1 times [2022-02-15 03:39:11,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:11,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537121894] [2022-02-15 03:39:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:11,602 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:11,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:11,603 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:11,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:11,674 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:11,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537121894] [2022-02-15 03:39:11,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1537121894] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:11,674 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:11,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 03:39:11,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698900747] [2022-02-15 03:39:11,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:11,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 03:39:11,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:11,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 03:39:11,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 03:39:11,677 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2022-02-15 03:39:11,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:11,758 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2022-02-15 03:39:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 03:39:11,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 03:39:11,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:11,759 INFO L225 Difference]: With dead ends: 104 [2022-02-15 03:39:11,759 INFO L226 Difference]: Without dead ends: 75 [2022-02-15 03:39:11,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:39:11,760 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:11,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 45 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 03:39:11,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-15 03:39:11,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2022-02-15 03:39:11,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2022-02-15 03:39:11,777 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 36 [2022-02-15 03:39:11,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:11,777 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2022-02-15 03:39:11,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2022-02-15 03:39:11,777 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2022-02-15 03:39:11,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 03:39:11,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:11,778 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-02-15 03:39:11,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 03:39:11,778 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:11,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:11,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1464313968, now seen corresponding path program 2 times [2022-02-15 03:39:11,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:11,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076173684] [2022-02-15 03:39:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:11,780 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:11,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:11,781 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:11,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:11,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:11,842 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:11,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076173684] [2022-02-15 03:39:11,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2076173684] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:11,842 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:11,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 03:39:11,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831494691] [2022-02-15 03:39:11,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:11,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 03:39:11,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:11,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 03:39:11,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 03:39:11,843 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2022-02-15 03:39:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:11,930 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2022-02-15 03:39:11,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 03:39:11,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 39 [2022-02-15 03:39:11,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:11,932 INFO L225 Difference]: With dead ends: 154 [2022-02-15 03:39:11,932 INFO L226 Difference]: Without dead ends: 109 [2022-02-15 03:39:11,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:39:11,932 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 71 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:11,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 38 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 03:39:11,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-15 03:39:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2022-02-15 03:39:11,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-02-15 03:39:11,947 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 39 [2022-02-15 03:39:11,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:11,947 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-02-15 03:39:11,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2022-02-15 03:39:11,948 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-02-15 03:39:11,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 03:39:11,948 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:11,948 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-02-15 03:39:11,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 03:39:11,948 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:11,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:11,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2131958580, now seen corresponding path program 1 times [2022-02-15 03:39:11,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:11,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972761477] [2022-02-15 03:39:11,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:11,950 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:11,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:11,951 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:12,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:12,209 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:12,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972761477] [2022-02-15 03:39:12,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [972761477] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:12,210 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:12,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:39:12,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643717982] [2022-02-15 03:39:12,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:12,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:39:12,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:12,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:39:12,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:39:12,211 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:12,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:12,497 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2022-02-15 03:39:12,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:39:12,497 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 03:39:12,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:12,498 INFO L225 Difference]: With dead ends: 90 [2022-02-15 03:39:12,498 INFO L226 Difference]: Without dead ends: 75 [2022-02-15 03:39:12,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:39:12,498 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 85 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:12,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 48 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:12,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-15 03:39:12,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-02-15 03:39:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 69 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:12,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-02-15 03:39:12,529 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 40 [2022-02-15 03:39:12,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:12,530 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-02-15 03:39:12,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:12,530 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-02-15 03:39:12,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 03:39:12,531 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:12,531 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1] [2022-02-15 03:39:12,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 03:39:12,531 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:12,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1769981706, now seen corresponding path program 1 times [2022-02-15 03:39:12,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:12,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700148634] [2022-02-15 03:39:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:12,534 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:12,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:12,536 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:12,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:12,715 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:12,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700148634] [2022-02-15 03:39:12,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1700148634] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:12,715 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:12,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:39:12,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606020348] [2022-02-15 03:39:12,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:12,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:39:12,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:12,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:39:12,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:39:12,716 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:12,862 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2022-02-15 03:39:12,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:39:12,862 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 03:39:12,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:12,863 INFO L225 Difference]: With dead ends: 105 [2022-02-15 03:39:12,863 INFO L226 Difference]: Without dead ends: 72 [2022-02-15 03:39:12,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:39:12,864 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 72 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:12,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 49 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:12,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-15 03:39:12,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-02-15 03:39:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:12,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-02-15 03:39:12,881 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 40 [2022-02-15 03:39:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:12,881 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-02-15 03:39:12,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:12,881 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-02-15 03:39:12,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 03:39:12,882 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:12,882 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-02-15 03:39:12,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 03:39:12,882 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:12,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:12,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2076492661, now seen corresponding path program 1 times [2022-02-15 03:39:12,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:12,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698394155] [2022-02-15 03:39:12,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:12,883 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:12,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:12,884 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:13,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:13,077 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:13,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698394155] [2022-02-15 03:39:13,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1698394155] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:13,077 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:13,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:39:13,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881571750] [2022-02-15 03:39:13,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:13,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:39:13,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:13,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:39:13,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:39:13,078 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:13,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:13,339 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2022-02-15 03:39:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:39:13,339 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-15 03:39:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:13,340 INFO L225 Difference]: With dead ends: 104 [2022-02-15 03:39:13,340 INFO L226 Difference]: Without dead ends: 76 [2022-02-15 03:39:13,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:39:13,341 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 87 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:13,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 48 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:13,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-15 03:39:13,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-02-15 03:39:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2022-02-15 03:39:13,360 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 41 [2022-02-15 03:39:13,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:13,361 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2022-02-15 03:39:13,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:13,361 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2022-02-15 03:39:13,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 03:39:13,362 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:13,363 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2022-02-15 03:39:13,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 03:39:13,363 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:13,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:13,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1960309197, now seen corresponding path program 1 times [2022-02-15 03:39:13,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:13,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631289635] [2022-02-15 03:39:13,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:13,365 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:13,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:13,366 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:13,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:13,865 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:13,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631289635] [2022-02-15 03:39:13,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1631289635] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:13,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:13,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:39:13,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136308416] [2022-02-15 03:39:13,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:13,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:39:13,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:13,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:39:13,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:39:13,866 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 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) [2022-02-15 03:39:14,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:14,849 INFO L93 Difference]: Finished difference Result 276 states and 354 transitions. [2022-02-15 03:39:14,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 03:39:14,849 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 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 41 [2022-02-15 03:39:14,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:14,850 INFO L225 Difference]: With dead ends: 276 [2022-02-15 03:39:14,850 INFO L226 Difference]: Without dead ends: 245 [2022-02-15 03:39:14,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=352, Invalid=980, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 03:39:14,851 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 377 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:14,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 62 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:14,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-15 03:39:14,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 124. [2022-02-15 03:39:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.2941176470588236) internal successors, (154), 119 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:14,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2022-02-15 03:39:14,885 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 41 [2022-02-15 03:39:14,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:14,885 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2022-02-15 03:39:14,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 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) [2022-02-15 03:39:14,898 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2022-02-15 03:39:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 03:39:14,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:14,899 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2022-02-15 03:39:14,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 03:39:14,899 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:14,900 INFO L85 PathProgramCache]: Analyzing trace with hash 796628983, now seen corresponding path program 2 times [2022-02-15 03:39:14,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:14,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136548295] [2022-02-15 03:39:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:14,901 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:14,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:14,902 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:15,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:15,007 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:15,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136548295] [2022-02-15 03:39:15,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [136548295] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:15,007 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:15,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:39:15,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904909801] [2022-02-15 03:39:15,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:15,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:39:15,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:15,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:39:15,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:39:15,008 INFO L87 Difference]: Start difference. First operand 124 states and 158 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) [2022-02-15 03:39:15,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:15,188 INFO L93 Difference]: Finished difference Result 190 states and 244 transitions. [2022-02-15 03:39:15,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:39:15,188 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 41 [2022-02-15 03:39:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:15,189 INFO L225 Difference]: With dead ends: 190 [2022-02-15 03:39:15,189 INFO L226 Difference]: Without dead ends: 185 [2022-02-15 03:39:15,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:39:15,190 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 116 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:15,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 38 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:15,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-15 03:39:15,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 108. [2022-02-15 03:39:15,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.2815533980582525) internal successors, (132), 103 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 136 transitions. [2022-02-15 03:39:15,222 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 136 transitions. Word has length 41 [2022-02-15 03:39:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:15,222 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 136 transitions. [2022-02-15 03:39:15,222 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) [2022-02-15 03:39:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 136 transitions. [2022-02-15 03:39:15,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 03:39:15,222 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:15,222 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1] [2022-02-15 03:39:15,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 03:39:15,222 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:15,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:15,223 INFO L85 PathProgramCache]: Analyzing trace with hash -727315291, now seen corresponding path program 1 times [2022-02-15 03:39:15,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:15,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945127688] [2022-02-15 03:39:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:15,224 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:15,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:15,225 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:15,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:15,283 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:15,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945127688] [2022-02-15 03:39:15,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1945127688] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:15,283 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:15,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 03:39:15,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478810010] [2022-02-15 03:39:15,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:15,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 03:39:15,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:15,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 03:39:15,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:39:15,284 INFO L87 Difference]: Start difference. First operand 108 states and 136 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2022-02-15 03:39:15,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:15,530 INFO L93 Difference]: Finished difference Result 295 states and 378 transitions. [2022-02-15 03:39:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 03:39:15,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 03:39:15,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:15,532 INFO L225 Difference]: With dead ends: 295 [2022-02-15 03:39:15,532 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 03:39:15,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:39:15,534 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 147 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:15,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 57 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:15,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 03:39:15,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 113. [2022-02-15 03:39:15,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.2777777777777777) internal successors, (138), 108 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 142 transitions. [2022-02-15 03:39:15,569 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 142 transitions. Word has length 42 [2022-02-15 03:39:15,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:15,570 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 142 transitions. [2022-02-15 03:39:15,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2022-02-15 03:39:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 142 transitions. [2022-02-15 03:39:15,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 03:39:15,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:15,571 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 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] [2022-02-15 03:39:15,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 03:39:15,571 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:15,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1280661403, now seen corresponding path program 2 times [2022-02-15 03:39:15,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:15,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269446322] [2022-02-15 03:39:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:15,574 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:15,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:15,575 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:15,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:15,638 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:15,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269446322] [2022-02-15 03:39:15,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [269446322] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:15,639 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:15,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 03:39:15,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271294470] [2022-02-15 03:39:15,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:15,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 03:39:15,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:15,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 03:39:15,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-15 03:39:15,639 INFO L87 Difference]: Start difference. First operand 113 states and 142 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2022-02-15 03:39:15,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:15,979 INFO L93 Difference]: Finished difference Result 308 states and 393 transitions. [2022-02-15 03:39:15,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 03:39:15,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-15 03:39:15,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:15,980 INFO L225 Difference]: With dead ends: 308 [2022-02-15 03:39:15,981 INFO L226 Difference]: Without dead ends: 279 [2022-02-15 03:39:15,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:39:15,981 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 132 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:15,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 105 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:15,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-02-15 03:39:16,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 115. [2022-02-15 03:39:16,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.2818181818181817) internal successors, (141), 110 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:16,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 145 transitions. [2022-02-15 03:39:16,013 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 145 transitions. Word has length 46 [2022-02-15 03:39:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:16,013 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 145 transitions. [2022-02-15 03:39:16,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2022-02-15 03:39:16,013 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 145 transitions. [2022-02-15 03:39:16,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 03:39:16,014 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:16,014 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:16,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 03:39:16,014 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:16,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:16,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1482276086, now seen corresponding path program 3 times [2022-02-15 03:39:16,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:16,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626822807] [2022-02-15 03:39:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:16,015 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:16,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:16,016 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:16,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:16,086 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:16,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626822807] [2022-02-15 03:39:16,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1626822807] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:16,086 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:16,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:39:16,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825634520] [2022-02-15 03:39:16,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:16,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:39:16,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:16,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:39:16,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:39:16,087 INFO L87 Difference]: Start difference. First operand 115 states and 145 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:16,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:16,516 INFO L93 Difference]: Finished difference Result 361 states and 462 transitions. [2022-02-15 03:39:16,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:39:16,516 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 03:39:16,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:16,518 INFO L225 Difference]: With dead ends: 361 [2022-02-15 03:39:16,518 INFO L226 Difference]: Without dead ends: 332 [2022-02-15 03:39:16,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:39:16,518 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 162 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:16,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 129 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-15 03:39:16,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 117. [2022-02-15 03:39:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.2857142857142858) internal successors, (144), 112 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 148 transitions. [2022-02-15 03:39:16,551 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 148 transitions. Word has length 48 [2022-02-15 03:39:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:16,551 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 148 transitions. [2022-02-15 03:39:16,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 148 transitions. [2022-02-15 03:39:16,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 03:39:16,552 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:16,552 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 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] [2022-02-15 03:39:16,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 03:39:16,552 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:16,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:16,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1960458129, now seen corresponding path program 4 times [2022-02-15 03:39:16,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:16,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072385638] [2022-02-15 03:39:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:16,554 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:16,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:16,555 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:16,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:16,636 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:16,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072385638] [2022-02-15 03:39:16,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2072385638] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:16,636 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:16,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:39:16,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529335313] [2022-02-15 03:39:16,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:16,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:39:16,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:16,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:39:16,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:39:16,637 INFO L87 Difference]: Start difference. First operand 117 states and 148 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2022-02-15 03:39:17,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:17,155 INFO L93 Difference]: Finished difference Result 414 states and 531 transitions. [2022-02-15 03:39:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 03:39:17,155 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 03:39:17,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:17,157 INFO L225 Difference]: With dead ends: 414 [2022-02-15 03:39:17,157 INFO L226 Difference]: Without dead ends: 385 [2022-02-15 03:39:17,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:39:17,157 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 217 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:17,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 136 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:17,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-02-15 03:39:17,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 119. [2022-02-15 03:39:17,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.2894736842105263) internal successors, (147), 114 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 151 transitions. [2022-02-15 03:39:17,192 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 151 transitions. Word has length 50 [2022-02-15 03:39:17,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:17,192 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 151 transitions. [2022-02-15 03:39:17,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2022-02-15 03:39:17,192 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 151 transitions. [2022-02-15 03:39:17,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 03:39:17,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:17,193 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:17,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 03:39:17,193 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:17,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:17,193 INFO L85 PathProgramCache]: Analyzing trace with hash -145264029, now seen corresponding path program 1 times [2022-02-15 03:39:17,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:17,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077424627] [2022-02-15 03:39:17,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:17,194 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:17,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:17,195 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:17,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:17,282 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:17,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077424627] [2022-02-15 03:39:17,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2077424627] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:17,282 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:17,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:39:17,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346553627] [2022-02-15 03:39:17,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:17,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:39:17,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:17,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:39:17,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:39:17,283 INFO L87 Difference]: Start difference. First operand 119 states and 151 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:17,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:17,566 INFO L93 Difference]: Finished difference Result 210 states and 268 transitions. [2022-02-15 03:39:17,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 03:39:17,567 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-15 03:39:17,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:17,568 INFO L225 Difference]: With dead ends: 210 [2022-02-15 03:39:17,568 INFO L226 Difference]: Without dead ends: 205 [2022-02-15 03:39:17,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:39:17,569 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 127 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:17,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 90 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:17,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-15 03:39:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 164. [2022-02-15 03:39:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.3018867924528301) internal successors, (207), 159 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:17,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 211 transitions. [2022-02-15 03:39:17,626 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 211 transitions. Word has length 51 [2022-02-15 03:39:17,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:17,626 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 211 transitions. [2022-02-15 03:39:17,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:17,626 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 211 transitions. [2022-02-15 03:39:17,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 03:39:17,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:17,627 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:17,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 03:39:17,627 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:17,627 INFO L85 PathProgramCache]: Analyzing trace with hash -732070043, now seen corresponding path program 1 times [2022-02-15 03:39:17,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:17,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442804156] [2022-02-15 03:39:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:17,629 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:17,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:17,629 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:18,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:18,115 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:18,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442804156] [2022-02-15 03:39:18,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1442804156] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:18,115 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:18,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:39:18,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467855277] [2022-02-15 03:39:18,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:18,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:39:18,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:18,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:39:18,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:39:18,116 INFO L87 Difference]: Start difference. First operand 164 states and 211 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2022-02-15 03:39:18,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:18,868 INFO L93 Difference]: Finished difference Result 427 states and 550 transitions. [2022-02-15 03:39:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 03:39:18,868 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 51 [2022-02-15 03:39:18,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:18,870 INFO L225 Difference]: With dead ends: 427 [2022-02-15 03:39:18,870 INFO L226 Difference]: Without dead ends: 386 [2022-02-15 03:39:18,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 03:39:18,871 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 249 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:18,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 50 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:18,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-02-15 03:39:18,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 201. [2022-02-15 03:39:18,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.2959183673469388) internal successors, (254), 196 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 258 transitions. [2022-02-15 03:39:18,951 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 258 transitions. Word has length 51 [2022-02-15 03:39:18,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:18,952 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 258 transitions. [2022-02-15 03:39:18,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2022-02-15 03:39:18,952 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 258 transitions. [2022-02-15 03:39:18,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 03:39:18,952 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:18,952 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:18,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 03:39:18,953 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:18,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:18,953 INFO L85 PathProgramCache]: Analyzing trace with hash -810376151, now seen corresponding path program 2 times [2022-02-15 03:39:18,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:18,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677027392] [2022-02-15 03:39:18,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:18,954 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:18,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:18,955 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:19,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:19,409 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:19,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677027392] [2022-02-15 03:39:19,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [677027392] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:19,410 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:19,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:39:19,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889804638] [2022-02-15 03:39:19,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:19,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:39:19,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:19,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:39:19,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:39:19,411 INFO L87 Difference]: Start difference. First operand 201 states and 258 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:20,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:20,602 INFO L93 Difference]: Finished difference Result 568 states and 732 transitions. [2022-02-15 03:39:20,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 03:39:20,603 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-15 03:39:20,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:20,604 INFO L225 Difference]: With dead ends: 568 [2022-02-15 03:39:20,604 INFO L226 Difference]: Without dead ends: 473 [2022-02-15 03:39:20,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=1371, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 03:39:20,605 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 234 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:20,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 80 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:20,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-02-15 03:39:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 259. [2022-02-15 03:39:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.2992125984251968) internal successors, (330), 254 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 334 transitions. [2022-02-15 03:39:20,709 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 334 transitions. Word has length 51 [2022-02-15 03:39:20,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:20,710 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 334 transitions. [2022-02-15 03:39:20,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:20,710 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 334 transitions. [2022-02-15 03:39:20,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 03:39:20,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:20,710 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:20,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 03:39:20,710 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:20,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:20,711 INFO L85 PathProgramCache]: Analyzing trace with hash -4715419, now seen corresponding path program 1 times [2022-02-15 03:39:20,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:20,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501556993] [2022-02-15 03:39:20,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:20,712 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:20,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:20,713 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:21,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:21,015 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:21,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501556993] [2022-02-15 03:39:21,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1501556993] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:21,016 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:21,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:39:21,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222790795] [2022-02-15 03:39:21,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:21,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:39:21,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:21,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:39:21,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:39:21,016 INFO L87 Difference]: Start difference. First operand 259 states and 334 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2022-02-15 03:39:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:21,449 INFO L93 Difference]: Finished difference Result 446 states and 582 transitions. [2022-02-15 03:39:21,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:39:21,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 51 [2022-02-15 03:39:21,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:21,451 INFO L225 Difference]: With dead ends: 446 [2022-02-15 03:39:21,451 INFO L226 Difference]: Without dead ends: 387 [2022-02-15 03:39:21,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:39:21,454 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 135 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:21,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 48 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-02-15 03:39:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 270. [2022-02-15 03:39:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.2792452830188679) internal successors, (339), 265 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:21,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 343 transitions. [2022-02-15 03:39:21,578 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 343 transitions. Word has length 51 [2022-02-15 03:39:21,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:21,578 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 343 transitions. [2022-02-15 03:39:21,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2022-02-15 03:39:21,578 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 343 transitions. [2022-02-15 03:39:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 03:39:21,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:21,579 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:21,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 03:39:21,579 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:21,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:21,580 INFO L85 PathProgramCache]: Analyzing trace with hash -198494423, now seen corresponding path program 2 times [2022-02-15 03:39:21,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:21,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025263602] [2022-02-15 03:39:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:21,581 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:21,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:21,582 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:21,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:21,953 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:21,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025263602] [2022-02-15 03:39:21,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2025263602] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:21,953 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:21,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:39:21,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234214119] [2022-02-15 03:39:21,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:21,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:39:21,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:21,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:39:21,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:39:21,954 INFO L87 Difference]: Start difference. First operand 270 states and 343 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2022-02-15 03:39:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:22,481 INFO L93 Difference]: Finished difference Result 535 states and 682 transitions. [2022-02-15 03:39:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:39:22,481 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 51 [2022-02-15 03:39:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:22,485 INFO L225 Difference]: With dead ends: 535 [2022-02-15 03:39:22,485 INFO L226 Difference]: Without dead ends: 367 [2022-02-15 03:39:22,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:39:22,486 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 226 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:22,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 42 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:22,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-02-15 03:39:22,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 295. [2022-02-15 03:39:22,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.2655172413793103) internal successors, (367), 290 states have internal predecessors, (367), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:22,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 371 transitions. [2022-02-15 03:39:22,627 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 371 transitions. Word has length 51 [2022-02-15 03:39:22,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:22,627 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 371 transitions. [2022-02-15 03:39:22,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2022-02-15 03:39:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 371 transitions. [2022-02-15 03:39:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 03:39:22,628 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:22,628 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 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] [2022-02-15 03:39:22,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 03:39:22,628 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:22,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:22,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1931900780, now seen corresponding path program 5 times [2022-02-15 03:39:22,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:22,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577899775] [2022-02-15 03:39:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:22,629 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:22,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:22,630 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:22,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:22,734 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:22,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577899775] [2022-02-15 03:39:22,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1577899775] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:22,734 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:22,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:39:22,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722733798] [2022-02-15 03:39:22,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:22,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:39:22,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:22,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:39:22,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:39:22,735 INFO L87 Difference]: Start difference. First operand 295 states and 371 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2022-02-15 03:39:23,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:23,983 INFO L93 Difference]: Finished difference Result 1351 states and 1687 transitions. [2022-02-15 03:39:23,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:39:23,984 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 52 [2022-02-15 03:39:23,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:23,987 INFO L225 Difference]: With dead ends: 1351 [2022-02-15 03:39:23,987 INFO L226 Difference]: Without dead ends: 1322 [2022-02-15 03:39:23,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:39:23,988 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 243 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:23,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 165 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:23,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-02-15 03:39:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 297. [2022-02-15 03:39:24,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.2671232876712328) internal successors, (370), 292 states have internal predecessors, (370), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:24,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 374 transitions. [2022-02-15 03:39:24,132 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 374 transitions. Word has length 52 [2022-02-15 03:39:24,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:24,133 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 374 transitions. [2022-02-15 03:39:24,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2022-02-15 03:39:24,133 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 374 transitions. [2022-02-15 03:39:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 03:39:24,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:24,134 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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, 1, 1, 1, 1, 1] [2022-02-15 03:39:24,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 03:39:24,134 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:24,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2072849753, now seen corresponding path program 2 times [2022-02-15 03:39:24,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:24,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773095080] [2022-02-15 03:39:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:24,137 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:24,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:24,138 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:24,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:24,180 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:24,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773095080] [2022-02-15 03:39:24,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [773095080] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:24,181 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:24,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 03:39:24,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276088606] [2022-02-15 03:39:24,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:24,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 03:39:24,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 03:39:24,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 03:39:24,181 INFO L87 Difference]: Start difference. First operand 297 states and 374 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:24,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:24,410 INFO L93 Difference]: Finished difference Result 514 states and 645 transitions. [2022-02-15 03:39:24,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 03:39:24,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 03:39:24,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:24,411 INFO L225 Difference]: With dead ends: 514 [2022-02-15 03:39:24,411 INFO L226 Difference]: Without dead ends: 273 [2022-02-15 03:39:24,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:39:24,412 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:24,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 53 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:24,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-02-15 03:39:24,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 253. [2022-02-15 03:39:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.189516129032258) internal successors, (295), 248 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 299 transitions. [2022-02-15 03:39:24,537 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 299 transitions. Word has length 54 [2022-02-15 03:39:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:24,537 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 299 transitions. [2022-02-15 03:39:24,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:24,537 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 299 transitions. [2022-02-15 03:39:24,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 03:39:24,538 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:24,538 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 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] [2022-02-15 03:39:24,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 03:39:24,538 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:24,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:24,538 INFO L85 PathProgramCache]: Analyzing trace with hash 258092167, now seen corresponding path program 6 times [2022-02-15 03:39:24,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:24,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656429387] [2022-02-15 03:39:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:24,539 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:24,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:24,540 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:24,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:24,647 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:24,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656429387] [2022-02-15 03:39:24,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1656429387] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:24,647 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:24,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:39:24,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555518551] [2022-02-15 03:39:24,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:24,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:39:24,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:24,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:39:24,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:39:24,648 INFO L87 Difference]: Start difference. First operand 253 states and 299 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:26,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:26,011 INFO L93 Difference]: Finished difference Result 1360 states and 1603 transitions. [2022-02-15 03:39:26,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:39:26,011 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 03:39:26,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:26,014 INFO L225 Difference]: With dead ends: 1360 [2022-02-15 03:39:26,014 INFO L226 Difference]: Without dead ends: 1331 [2022-02-15 03:39:26,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-15 03:39:26,015 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 296 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:26,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 186 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:39:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2022-02-15 03:39:26,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 255. [2022-02-15 03:39:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.192) internal successors, (298), 250 states have internal predecessors, (298), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:26,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 302 transitions. [2022-02-15 03:39:26,156 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 302 transitions. Word has length 54 [2022-02-15 03:39:26,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:26,156 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 302 transitions. [2022-02-15 03:39:26,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:26,157 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 302 transitions. [2022-02-15 03:39:26,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 03:39:26,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:26,157 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 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] [2022-02-15 03:39:26,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 03:39:26,157 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:26,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:26,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1954216222, now seen corresponding path program 7 times [2022-02-15 03:39:26,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:26,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368249149] [2022-02-15 03:39:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:26,159 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:26,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:26,160 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:26,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:26,289 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:26,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368249149] [2022-02-15 03:39:26,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [368249149] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:26,289 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:26,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:39:26,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399541157] [2022-02-15 03:39:26,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:26,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:39:26,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:26,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:39:26,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:39:26,290 INFO L87 Difference]: Start difference. First operand 255 states and 302 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2022-02-15 03:39:28,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:28,046 INFO L93 Difference]: Finished difference Result 1528 states and 1803 transitions. [2022-02-15 03:39:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:39:28,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 56 [2022-02-15 03:39:28,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:28,050 INFO L225 Difference]: With dead ends: 1528 [2022-02-15 03:39:28,051 INFO L226 Difference]: Without dead ends: 1499 [2022-02-15 03:39:28,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:39:28,051 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 322 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:28,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 215 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1830 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:39:28,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2022-02-15 03:39:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 257. [2022-02-15 03:39:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.1944444444444444) internal successors, (301), 252 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:28,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 305 transitions. [2022-02-15 03:39:28,199 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 305 transitions. Word has length 56 [2022-02-15 03:39:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:28,199 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 305 transitions. [2022-02-15 03:39:28,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2022-02-15 03:39:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 305 transitions. [2022-02-15 03:39:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 03:39:28,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:28,200 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 5, 5, 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] [2022-02-15 03:39:28,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 03:39:28,200 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:28,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:28,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1973766531, now seen corresponding path program 8 times [2022-02-15 03:39:28,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:28,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811260699] [2022-02-15 03:39:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:28,201 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:28,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:28,202 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:28,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:28,342 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:28,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811260699] [2022-02-15 03:39:28,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811260699] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:28,342 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:28,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:39:28,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028223377] [2022-02-15 03:39:28,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:28,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:39:28,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:28,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:39:28,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:39:28,345 INFO L87 Difference]: Start difference. First operand 257 states and 305 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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) [2022-02-15 03:39:30,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:30,380 INFO L93 Difference]: Finished difference Result 1696 states and 2003 transitions. [2022-02-15 03:39:30,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:39:30,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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 58 [2022-02-15 03:39:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:30,384 INFO L225 Difference]: With dead ends: 1696 [2022-02-15 03:39:30,385 INFO L226 Difference]: Without dead ends: 1667 [2022-02-15 03:39:30,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:39:30,385 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 377 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2045 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:30,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 232 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2045 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:39:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2022-02-15 03:39:30,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 259. [2022-02-15 03:39:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.1968503937007875) internal successors, (304), 254 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 308 transitions. [2022-02-15 03:39:30,550 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 308 transitions. Word has length 58 [2022-02-15 03:39:30,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:30,550 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 308 transitions. [2022-02-15 03:39:30,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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) [2022-02-15 03:39:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 308 transitions. [2022-02-15 03:39:30,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 03:39:30,551 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:30,551 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:30,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 03:39:30,551 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:30,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1813405083, now seen corresponding path program 3 times [2022-02-15 03:39:30,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:30,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202844343] [2022-02-15 03:39:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:30,554 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:30,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:30,555 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:30,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:30,619 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:30,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202844343] [2022-02-15 03:39:30,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1202844343] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:30,619 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:30,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 03:39:30,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110038273] [2022-02-15 03:39:30,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:30,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 03:39:30,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:30,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 03:39:30,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-15 03:39:30,620 INFO L87 Difference]: Start difference. First operand 259 states and 308 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2022-02-15 03:39:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:30,947 INFO L93 Difference]: Finished difference Result 376 states and 437 transitions. [2022-02-15 03:39:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 03:39:30,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 03:39:30,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:30,948 INFO L225 Difference]: With dead ends: 376 [2022-02-15 03:39:30,948 INFO L226 Difference]: Without dead ends: 300 [2022-02-15 03:39:30,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:39:30,949 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 132 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:30,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 52 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:30,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-02-15 03:39:31,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 236. [2022-02-15 03:39:31,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.1948051948051948) internal successors, (276), 231 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 280 transitions. [2022-02-15 03:39:31,100 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 280 transitions. Word has length 60 [2022-02-15 03:39:31,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:31,100 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 280 transitions. [2022-02-15 03:39:31,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2022-02-15 03:39:31,100 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 280 transitions. [2022-02-15 03:39:31,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 03:39:31,101 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:31,101 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 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] [2022-02-15 03:39:31,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 03:39:31,101 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:31,101 INFO L85 PathProgramCache]: Analyzing trace with hash 713223000, now seen corresponding path program 9 times [2022-02-15 03:39:31,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:31,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963785250] [2022-02-15 03:39:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:31,103 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:31,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:31,104 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:31,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:31,248 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:31,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963785250] [2022-02-15 03:39:31,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [963785250] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:31,248 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:31,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:39:31,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339137397] [2022-02-15 03:39:31,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:31,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:39:31,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:39:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:39:31,249 INFO L87 Difference]: Start difference. First operand 236 states and 280 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:33,635 INFO L93 Difference]: Finished difference Result 1828 states and 2162 transitions. [2022-02-15 03:39:33,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:39:33,636 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 03:39:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:33,640 INFO L225 Difference]: With dead ends: 1828 [2022-02-15 03:39:33,640 INFO L226 Difference]: Without dead ends: 1799 [2022-02-15 03:39:33,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:39:33,641 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 404 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2716 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:33,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 261 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2716 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 03:39:33,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2022-02-15 03:39:33,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 238. [2022-02-15 03:39:33,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.1974248927038627) internal successors, (279), 233 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 283 transitions. [2022-02-15 03:39:33,808 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 283 transitions. Word has length 60 [2022-02-15 03:39:33,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:33,808 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 283 transitions. [2022-02-15 03:39:33,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:33,808 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 283 transitions. [2022-02-15 03:39:33,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 03:39:33,808 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:33,808 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-15 03:39:33,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 03:39:33,809 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:33,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:33,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1971018387, now seen corresponding path program 4 times [2022-02-15 03:39:33,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:33,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324676129] [2022-02-15 03:39:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:33,810 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:33,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:33,811 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:34,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:34,073 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:34,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324676129] [2022-02-15 03:39:34,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [324676129] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:34,073 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:34,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:39:34,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327294134] [2022-02-15 03:39:34,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:34,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:39:34,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:34,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:39:34,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:39:34,074 INFO L87 Difference]: Start difference. First operand 238 states and 283 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2022-02-15 03:39:34,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:34,503 INFO L93 Difference]: Finished difference Result 292 states and 341 transitions. [2022-02-15 03:39:34,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:39:34,503 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 61 [2022-02-15 03:39:34,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:34,504 INFO L225 Difference]: With dead ends: 292 [2022-02-15 03:39:34,504 INFO L226 Difference]: Without dead ends: 216 [2022-02-15 03:39:34,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:39:34,504 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:34,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 54 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:34,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-15 03:39:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-02-15 03:39:34,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.2037914691943128) internal successors, (254), 211 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:34,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 258 transitions. [2022-02-15 03:39:34,658 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 258 transitions. Word has length 61 [2022-02-15 03:39:34,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:34,658 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 258 transitions. [2022-02-15 03:39:34,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2022-02-15 03:39:34,658 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 258 transitions. [2022-02-15 03:39:34,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 03:39:34,659 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:34,659 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:34,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 03:39:34,659 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:34,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:34,659 INFO L85 PathProgramCache]: Analyzing trace with hash -891810688, now seen corresponding path program 5 times [2022-02-15 03:39:34,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:34,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739579139] [2022-02-15 03:39:34,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:34,660 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:34,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:34,661 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:35,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:35,231 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:35,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739579139] [2022-02-15 03:39:35,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1739579139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:35,231 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:35,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:39:35,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677798376] [2022-02-15 03:39:35,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:35,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:39:35,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:35,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:39:35,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:39:35,232 INFO L87 Difference]: Start difference. First operand 216 states and 258 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2022-02-15 03:39:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:36,791 INFO L93 Difference]: Finished difference Result 788 states and 930 transitions. [2022-02-15 03:39:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 03:39:36,792 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 62 [2022-02-15 03:39:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:36,793 INFO L225 Difference]: With dead ends: 788 [2022-02-15 03:39:36,793 INFO L226 Difference]: Without dead ends: 676 [2022-02-15 03:39:36,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=354, Invalid=1626, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 03:39:36,794 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 264 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:36,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 87 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:39:36,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-02-15 03:39:37,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 291. [2022-02-15 03:39:37,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.1923076923076923) internal successors, (341), 286 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 345 transitions. [2022-02-15 03:39:37,020 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 345 transitions. Word has length 62 [2022-02-15 03:39:37,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:37,021 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 345 transitions. [2022-02-15 03:39:37,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2022-02-15 03:39:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 345 transitions. [2022-02-15 03:39:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 03:39:37,021 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:37,021 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:37,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 03:39:37,022 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:37,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:37,022 INFO L85 PathProgramCache]: Analyzing trace with hash -970116796, now seen corresponding path program 6 times [2022-02-15 03:39:37,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:37,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252050441] [2022-02-15 03:39:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:37,023 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:37,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:37,024 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:37,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:37,211 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:37,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252050441] [2022-02-15 03:39:37,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [252050441] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:37,211 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:37,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:39:37,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009561717] [2022-02-15 03:39:37,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:37,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:39:37,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:39:37,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:39:37,212 INFO L87 Difference]: Start difference. First operand 291 states and 345 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2022-02-15 03:39:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:37,766 INFO L93 Difference]: Finished difference Result 423 states and 495 transitions. [2022-02-15 03:39:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:39:37,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 03:39:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:37,781 INFO L225 Difference]: With dead ends: 423 [2022-02-15 03:39:37,781 INFO L226 Difference]: Without dead ends: 418 [2022-02-15 03:39:37,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:39:37,782 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 152 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:37,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 48 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:37,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-02-15 03:39:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 298. [2022-02-15 03:39:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.1945392491467577) internal successors, (350), 293 states have internal predecessors, (350), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:38,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 354 transitions. [2022-02-15 03:39:38,015 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 354 transitions. Word has length 62 [2022-02-15 03:39:38,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:38,015 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 354 transitions. [2022-02-15 03:39:38,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2022-02-15 03:39:38,015 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 354 transitions. [2022-02-15 03:39:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 03:39:38,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:38,016 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1] [2022-02-15 03:39:38,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 03:39:38,016 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:38,016 INFO L85 PathProgramCache]: Analyzing trace with hash 475673560, now seen corresponding path program 7 times [2022-02-15 03:39:38,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:38,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709241806] [2022-02-15 03:39:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:38,017 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:38,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:38,018 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:38,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:38,091 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:38,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709241806] [2022-02-15 03:39:38,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [709241806] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:38,091 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:38,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:39:38,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445661066] [2022-02-15 03:39:38,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:38,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:39:38,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:38,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:39:38,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:39:38,092 INFO L87 Difference]: Start difference. First operand 298 states and 354 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:38,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:38,742 INFO L93 Difference]: Finished difference Result 593 states and 691 transitions. [2022-02-15 03:39:38,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 03:39:38,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-15 03:39:38,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:38,744 INFO L225 Difference]: With dead ends: 593 [2022-02-15 03:39:38,744 INFO L226 Difference]: Without dead ends: 544 [2022-02-15 03:39:38,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:39:38,745 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 99 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:38,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 67 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:39:38,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-02-15 03:39:38,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 298. [2022-02-15 03:39:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.1843003412969284) internal successors, (347), 293 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 351 transitions. [2022-02-15 03:39:38,975 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 351 transitions. Word has length 63 [2022-02-15 03:39:38,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:38,975 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 351 transitions. [2022-02-15 03:39:38,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:38,975 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 351 transitions. [2022-02-15 03:39:38,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 03:39:38,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:38,976 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-15 03:39:38,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 03:39:38,976 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:38,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:38,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2031628323, now seen corresponding path program 8 times [2022-02-15 03:39:38,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:38,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989957992] [2022-02-15 03:39:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:38,977 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:38,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:38,978 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:39,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:39,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:39,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:39,074 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:39,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989957992] [2022-02-15 03:39:39,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [989957992] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:39,075 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:39,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:39:39,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703625232] [2022-02-15 03:39:39,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:39,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:39:39,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:39,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:39:39,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:39:39,075 INFO L87 Difference]: Start difference. First operand 298 states and 351 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2022-02-15 03:39:40,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:40,007 INFO L93 Difference]: Finished difference Result 793 states and 925 transitions. [2022-02-15 03:39:40,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 03:39:40,007 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-15 03:39:40,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:40,009 INFO L225 Difference]: With dead ends: 793 [2022-02-15 03:39:40,009 INFO L226 Difference]: Without dead ends: 744 [2022-02-15 03:39:40,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:39:40,010 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 188 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:40,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 81 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-02-15 03:39:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 320. [2022-02-15 03:39:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.1777777777777778) internal successors, (371), 315 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 375 transitions. [2022-02-15 03:39:40,269 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 375 transitions. Word has length 65 [2022-02-15 03:39:40,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:40,269 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 375 transitions. [2022-02-15 03:39:40,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2022-02-15 03:39:40,269 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 375 transitions. [2022-02-15 03:39:40,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 03:39:40,270 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:40,270 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-15 03:39:40,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 03:39:40,270 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:40,270 INFO L85 PathProgramCache]: Analyzing trace with hash -2072084830, now seen corresponding path program 9 times [2022-02-15 03:39:40,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:40,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588358390] [2022-02-15 03:39:40,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:40,271 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:40,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:40,272 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:40,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:40,376 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:40,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588358390] [2022-02-15 03:39:40,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1588358390] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:40,376 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:40,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:39:40,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767011955] [2022-02-15 03:39:40,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:40,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:39:40,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:40,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:39:40,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:39:40,378 INFO L87 Difference]: Start difference. First operand 320 states and 375 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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) [2022-02-15 03:39:41,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:41,593 INFO L93 Difference]: Finished difference Result 984 states and 1147 transitions. [2022-02-15 03:39:41,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:39:41,593 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-02-15 03:39:41,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:41,595 INFO L225 Difference]: With dead ends: 984 [2022-02-15 03:39:41,595 INFO L226 Difference]: Without dead ends: 935 [2022-02-15 03:39:41,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:39:41,596 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 198 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:41,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 110 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-02-15 03:39:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 320. [2022-02-15 03:39:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.1777777777777778) internal successors, (371), 315 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 375 transitions. [2022-02-15 03:39:41,868 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 375 transitions. Word has length 67 [2022-02-15 03:39:41,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:41,868 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 375 transitions. [2022-02-15 03:39:41,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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) [2022-02-15 03:39:41,868 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 375 transitions. [2022-02-15 03:39:41,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 03:39:41,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:41,869 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-15 03:39:41,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 03:39:41,869 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:41,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:41,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1998884903, now seen corresponding path program 10 times [2022-02-15 03:39:41,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:41,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415161640] [2022-02-15 03:39:41,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:41,871 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:41,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:41,872 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:41,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:41,995 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:41,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415161640] [2022-02-15 03:39:41,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1415161640] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:41,995 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:41,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:39:41,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881204867] [2022-02-15 03:39:41,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:41,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:39:41,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:41,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:39:41,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:39:41,998 INFO L87 Difference]: Start difference. First operand 320 states and 375 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:43,567 INFO L93 Difference]: Finished difference Result 1175 states and 1369 transitions. [2022-02-15 03:39:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:39:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-15 03:39:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:43,570 INFO L225 Difference]: With dead ends: 1175 [2022-02-15 03:39:43,570 INFO L226 Difference]: Without dead ends: 1126 [2022-02-15 03:39:43,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:39:43,571 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 228 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:43,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 134 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:43,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2022-02-15 03:39:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 320. [2022-02-15 03:39:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.1777777777777778) internal successors, (371), 315 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 375 transitions. [2022-02-15 03:39:43,849 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 375 transitions. Word has length 69 [2022-02-15 03:39:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:43,849 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 375 transitions. [2022-02-15 03:39:43,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 375 transitions. [2022-02-15 03:39:43,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 03:39:43,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:43,850 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-15 03:39:43,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 03:39:43,850 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:43,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:43,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1485591660, now seen corresponding path program 11 times [2022-02-15 03:39:43,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:43,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723581608] [2022-02-15 03:39:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:43,851 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:43,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:43,852 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:43,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:43,974 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:43,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723581608] [2022-02-15 03:39:43,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1723581608] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:43,974 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:43,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:39:43,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643925164] [2022-02-15 03:39:43,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:43,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:39:43,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:39:43,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:39:43,975 INFO L87 Difference]: Start difference. First operand 320 states and 375 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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) [2022-02-15 03:39:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:45,773 INFO L93 Difference]: Finished difference Result 1366 states and 1591 transitions. [2022-02-15 03:39:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:39:45,774 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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 71 [2022-02-15 03:39:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:45,777 INFO L225 Difference]: With dead ends: 1366 [2022-02-15 03:39:45,777 INFO L226 Difference]: Without dead ends: 1317 [2022-02-15 03:39:45,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:39:45,778 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 276 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:45,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 141 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:45,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2022-02-15 03:39:46,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 320. [2022-02-15 03:39:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.1777777777777778) internal successors, (371), 315 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:46,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 375 transitions. [2022-02-15 03:39:46,061 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 375 transitions. Word has length 71 [2022-02-15 03:39:46,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:46,062 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 375 transitions. [2022-02-15 03:39:46,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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) [2022-02-15 03:39:46,062 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 375 transitions. [2022-02-15 03:39:46,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 03:39:46,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:46,063 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2022-02-15 03:39:46,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 03:39:46,063 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:46,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:46,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1517007984, now seen corresponding path program 12 times [2022-02-15 03:39:46,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:46,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836515289] [2022-02-15 03:39:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:46,065 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:46,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:46,066 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:46,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:46,184 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:46,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836515289] [2022-02-15 03:39:46,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1836515289] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:46,184 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:46,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:39:46,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898523204] [2022-02-15 03:39:46,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:46,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:39:46,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:46,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:39:46,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:39:46,185 INFO L87 Difference]: Start difference. First operand 320 states and 375 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 9 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) [2022-02-15 03:39:47,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:47,051 INFO L93 Difference]: Finished difference Result 526 states and 612 transitions. [2022-02-15 03:39:47,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:39:47,051 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 9 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 72 [2022-02-15 03:39:47,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:47,053 INFO L225 Difference]: With dead ends: 526 [2022-02-15 03:39:47,053 INFO L226 Difference]: Without dead ends: 521 [2022-02-15 03:39:47,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:39:47,054 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 182 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:47,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 137 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:39:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-02-15 03:39:47,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 418. [2022-02-15 03:39:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 413 states have (on average 1.171912832929782) internal successors, (484), 413 states have internal predecessors, (484), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:47,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 488 transitions. [2022-02-15 03:39:47,457 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 488 transitions. Word has length 72 [2022-02-15 03:39:47,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:47,457 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 488 transitions. [2022-02-15 03:39:47,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 9 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) [2022-02-15 03:39:47,457 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 488 transitions. [2022-02-15 03:39:47,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 03:39:47,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:47,458 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 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, 1, 1] [2022-02-15 03:39:47,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 03:39:47,458 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:47,459 INFO L85 PathProgramCache]: Analyzing trace with hash 930201970, now seen corresponding path program 13 times [2022-02-15 03:39:47,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:47,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109851279] [2022-02-15 03:39:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:47,460 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:47,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:47,461 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:48,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:48,075 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:48,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109851279] [2022-02-15 03:39:48,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [109851279] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:48,075 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:48,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:39:48,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760763593] [2022-02-15 03:39:48,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:48,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:39:48,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:48,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:39:48,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:39:48,077 INFO L87 Difference]: Start difference. First operand 418 states and 488 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-02-15 03:39:49,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:49,881 INFO L93 Difference]: Finished difference Result 955 states and 1106 transitions. [2022-02-15 03:39:49,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 03:39:49,881 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 72 [2022-02-15 03:39:49,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:49,883 INFO L225 Difference]: With dead ends: 955 [2022-02-15 03:39:49,883 INFO L226 Difference]: Without dead ends: 901 [2022-02-15 03:39:49,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=872, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 03:39:49,884 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 252 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:49,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 61 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:49,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-02-15 03:39:50,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 485. [2022-02-15 03:39:50,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 480 states have (on average 1.1479166666666667) internal successors, (551), 480 states have internal predecessors, (551), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 555 transitions. [2022-02-15 03:39:50,388 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 555 transitions. Word has length 72 [2022-02-15 03:39:50,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:50,388 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 555 transitions. [2022-02-15 03:39:50,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-02-15 03:39:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 555 transitions. [2022-02-15 03:39:50,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 03:39:50,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:50,390 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 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, 1, 1] [2022-02-15 03:39:50,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 03:39:50,390 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:50,390 INFO L85 PathProgramCache]: Analyzing trace with hash -188563146, now seen corresponding path program 14 times [2022-02-15 03:39:50,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:50,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756133144] [2022-02-15 03:39:50,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:50,391 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:50,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:50,392 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:51,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:51,003 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:51,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756133144] [2022-02-15 03:39:51,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [756133144] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:51,003 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:51,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:39:51,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99989329] [2022-02-15 03:39:51,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:51,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:39:51,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:51,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:39:51,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:39:51,004 INFO L87 Difference]: Start difference. First operand 485 states and 555 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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) [2022-02-15 03:39:52,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:52,974 INFO L93 Difference]: Finished difference Result 1241 states and 1437 transitions. [2022-02-15 03:39:52,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 03:39:52,974 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 72 [2022-02-15 03:39:52,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:52,977 INFO L225 Difference]: With dead ends: 1241 [2022-02-15 03:39:52,977 INFO L226 Difference]: Without dead ends: 1026 [2022-02-15 03:39:52,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=998, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 03:39:52,978 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 212 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:52,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 60 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:52,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-02-15 03:39:53,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 615. [2022-02-15 03:39:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 610 states have (on average 1.1327868852459015) internal successors, (691), 610 states have internal predecessors, (691), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 695 transitions. [2022-02-15 03:39:53,666 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 695 transitions. Word has length 72 [2022-02-15 03:39:53,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:53,666 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 695 transitions. [2022-02-15 03:39:53,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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) [2022-02-15 03:39:53,666 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 695 transitions. [2022-02-15 03:39:53,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 03:39:53,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:53,667 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 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, 1, 1] [2022-02-15 03:39:53,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 03:39:53,667 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:53,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:53,667 INFO L85 PathProgramCache]: Analyzing trace with hash 673002482, now seen corresponding path program 15 times [2022-02-15 03:39:53,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:53,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526129843] [2022-02-15 03:39:53,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:53,668 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:53,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:53,669 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:54,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:54,414 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:54,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526129843] [2022-02-15 03:39:54,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1526129843] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:54,415 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:54,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:39:54,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960172566] [2022-02-15 03:39:54,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:54,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:39:54,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:54,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:39:54,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:39:54,415 INFO L87 Difference]: Start difference. First operand 615 states and 695 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-02-15 03:39:56,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:56,271 INFO L93 Difference]: Finished difference Result 1197 states and 1376 transitions. [2022-02-15 03:39:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 03:39:56,272 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 72 [2022-02-15 03:39:56,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:56,274 INFO L225 Difference]: With dead ends: 1197 [2022-02-15 03:39:56,274 INFO L226 Difference]: Without dead ends: 994 [2022-02-15 03:39:56,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=872, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 03:39:56,275 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 247 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:56,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 50 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:39:56,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-02-15 03:39:57,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 804. [2022-02-15 03:39:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 799 states have (on average 1.1264080100125156) internal successors, (900), 799 states have internal predecessors, (900), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:39:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 904 transitions. [2022-02-15 03:39:57,198 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 904 transitions. Word has length 72 [2022-02-15 03:39:57,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:39:57,198 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 904 transitions. [2022-02-15 03:39:57,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-02-15 03:39:57,198 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 904 transitions. [2022-02-15 03:39:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 03:39:57,199 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:39:57,199 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 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, 1, 1] [2022-02-15 03:39:57,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 03:39:57,200 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:39:57,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:39:57,200 INFO L85 PathProgramCache]: Analyzing trace with hash 479223478, now seen corresponding path program 16 times [2022-02-15 03:39:57,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:39:57,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889263165] [2022-02-15 03:39:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:39:57,204 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:39:57,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:39:57,206 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:39:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:57,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:39:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:39:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:39:57,807 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:39:57,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889263165] [2022-02-15 03:39:57,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1889263165] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:39:57,807 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:39:57,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:39:57,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537031045] [2022-02-15 03:39:57,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:39:57,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:39:57,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:39:57,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:39:57,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:39:57,808 INFO L87 Difference]: Start difference. First operand 804 states and 904 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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) [2022-02-15 03:39:59,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:39:59,583 INFO L93 Difference]: Finished difference Result 1010 states and 1145 transitions. [2022-02-15 03:39:59,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 03:39:59,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 72 [2022-02-15 03:39:59,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:39:59,585 INFO L225 Difference]: With dead ends: 1010 [2022-02-15 03:39:59,585 INFO L226 Difference]: Without dead ends: 822 [2022-02-15 03:39:59,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=998, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 03:39:59,586 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 219 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:39:59,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 85 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:39:59,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-02-15 03:40:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 666. [2022-02-15 03:40:00,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 661 states have (on average 1.1270801815431164) internal successors, (745), 661 states have internal predecessors, (745), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 749 transitions. [2022-02-15 03:40:00,350 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 749 transitions. Word has length 72 [2022-02-15 03:40:00,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:00,350 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 749 transitions. [2022-02-15 03:40:00,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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) [2022-02-15 03:40:00,350 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 749 transitions. [2022-02-15 03:40:00,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 03:40:00,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:00,351 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:00,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 03:40:00,351 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:00,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:00,351 INFO L85 PathProgramCache]: Analyzing trace with hash -316626525, now seen corresponding path program 10 times [2022-02-15 03:40:00,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:00,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050126655] [2022-02-15 03:40:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:00,352 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:00,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:00,353 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:00,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:00,502 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:00,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050126655] [2022-02-15 03:40:00,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1050126655] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:00,502 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:00,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:40:00,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626628854] [2022-02-15 03:40:00,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:00,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:40:00,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:00,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:40:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:40:00,503 INFO L87 Difference]: Start difference. First operand 666 states and 749 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2022-02-15 03:40:05,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:05,515 INFO L93 Difference]: Finished difference Result 3092 states and 3576 transitions. [2022-02-15 03:40:05,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:40:05,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 72 [2022-02-15 03:40:05,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:05,521 INFO L225 Difference]: With dead ends: 3092 [2022-02-15 03:40:05,521 INFO L226 Difference]: Without dead ends: 3048 [2022-02-15 03:40:05,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:40:05,522 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 389 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2762 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 2782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:05,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 261 Invalid, 2782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2762 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 03:40:05,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3048 states. [2022-02-15 03:40:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3048 to 668. [2022-02-15 03:40:06,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 663 states have (on average 1.1282051282051282) internal successors, (748), 663 states have internal predecessors, (748), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:06,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 752 transitions. [2022-02-15 03:40:06,312 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 752 transitions. Word has length 72 [2022-02-15 03:40:06,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:06,312 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 752 transitions. [2022-02-15 03:40:06,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2022-02-15 03:40:06,312 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 752 transitions. [2022-02-15 03:40:06,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 03:40:06,313 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:06,313 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-15 03:40:06,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 03:40:06,313 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:06,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:06,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2132024177, now seen corresponding path program 17 times [2022-02-15 03:40:06,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:06,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648144945] [2022-02-15 03:40:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:06,315 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:06,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:06,316 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:06,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:06,458 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:06,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648144945] [2022-02-15 03:40:06,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [648144945] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:06,458 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:06,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:40:06,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392746728] [2022-02-15 03:40:06,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:06,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:40:06,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:06,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:40:06,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:40:06,459 INFO L87 Difference]: Start difference. First operand 668 states and 752 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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) [2022-02-15 03:40:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:09,966 INFO L93 Difference]: Finished difference Result 2177 states and 2503 transitions. [2022-02-15 03:40:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:40:09,966 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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 73 [2022-02-15 03:40:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:09,971 INFO L225 Difference]: With dead ends: 2177 [2022-02-15 03:40:09,971 INFO L226 Difference]: Without dead ends: 2128 [2022-02-15 03:40:09,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:40:09,972 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 316 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:09,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 165 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:40:09,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2022-02-15 03:40:10,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 668. [2022-02-15 03:40:10,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 663 states have (on average 1.1282051282051282) internal successors, (748), 663 states have internal predecessors, (748), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:10,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 752 transitions. [2022-02-15 03:40:10,794 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 752 transitions. Word has length 73 [2022-02-15 03:40:10,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:10,794 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 752 transitions. [2022-02-15 03:40:10,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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) [2022-02-15 03:40:10,794 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 752 transitions. [2022-02-15 03:40:10,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 03:40:10,795 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:10,795 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1] [2022-02-15 03:40:10,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 03:40:10,795 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:10,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:10,795 INFO L85 PathProgramCache]: Analyzing trace with hash -505226483, now seen corresponding path program 18 times [2022-02-15 03:40:10,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:10,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579652311] [2022-02-15 03:40:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:10,796 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:10,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:10,797 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:10,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:10,901 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:10,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579652311] [2022-02-15 03:40:10,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1579652311] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:10,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:10,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:40:10,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926681552] [2022-02-15 03:40:10,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:10,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:40:10,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:10,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:40:10,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:40:10,902 INFO L87 Difference]: Start difference. First operand 668 states and 752 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:12,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:12,924 INFO L93 Difference]: Finished difference Result 1320 states and 1505 transitions. [2022-02-15 03:40:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:40:12,924 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 03:40:12,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:12,927 INFO L225 Difference]: With dead ends: 1320 [2022-02-15 03:40:12,927 INFO L226 Difference]: Without dead ends: 1235 [2022-02-15 03:40:12,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:40:12,928 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 258 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:12,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 81 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:40:12,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2022-02-15 03:40:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 726. [2022-02-15 03:40:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 721 states have (on average 1.1289875173370318) internal successors, (814), 721 states have internal predecessors, (814), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 818 transitions. [2022-02-15 03:40:13,803 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 818 transitions. Word has length 74 [2022-02-15 03:40:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:13,803 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 818 transitions. [2022-02-15 03:40:13,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:13,803 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 818 transitions. [2022-02-15 03:40:13,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 03:40:13,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:13,805 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:13,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 03:40:13,805 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:13,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1752054978, now seen corresponding path program 11 times [2022-02-15 03:40:13,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:13,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866969866] [2022-02-15 03:40:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:13,806 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:13,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:13,807 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:13,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:13,964 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:13,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866969866] [2022-02-15 03:40:13,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1866969866] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:13,964 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:13,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:40:13,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8176226] [2022-02-15 03:40:13,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:13,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:40:13,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:13,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:40:13,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:40:13,965 INFO L87 Difference]: Start difference. First operand 726 states and 818 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:20,020 INFO L93 Difference]: Finished difference Result 3408 states and 3942 transitions. [2022-02-15 03:40:20,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:40:20,020 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 03:40:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:20,025 INFO L225 Difference]: With dead ends: 3408 [2022-02-15 03:40:20,025 INFO L226 Difference]: Without dead ends: 3364 [2022-02-15 03:40:20,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-02-15 03:40:20,026 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 405 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3530 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 3551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:20,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 290 Invalid, 3551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3530 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 03:40:20,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2022-02-15 03:40:20,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 728. [2022-02-15 03:40:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 723 states have (on average 1.1300138312586445) internal successors, (817), 723 states have internal predecessors, (817), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 821 transitions. [2022-02-15 03:40:20,930 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 821 transitions. Word has length 74 [2022-02-15 03:40:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:20,930 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 821 transitions. [2022-02-15 03:40:20,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 821 transitions. [2022-02-15 03:40:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 03:40:20,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:20,931 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-15 03:40:20,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 03:40:20,931 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:20,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:20,932 INFO L85 PathProgramCache]: Analyzing trace with hash 583415094, now seen corresponding path program 19 times [2022-02-15 03:40:20,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:20,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183672036] [2022-02-15 03:40:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:20,933 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:20,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:20,934 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:21,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:21,081 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:21,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183672036] [2022-02-15 03:40:21,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [183672036] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:21,082 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:21,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:40:21,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169912846] [2022-02-15 03:40:21,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:21,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:40:21,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:21,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:40:21,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:40:21,082 INFO L87 Difference]: Start difference. First operand 728 states and 821 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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) [2022-02-15 03:40:25,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:25,405 INFO L93 Difference]: Finished difference Result 2493 states and 2869 transitions. [2022-02-15 03:40:25,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:40:25,405 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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 75 [2022-02-15 03:40:25,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:25,409 INFO L225 Difference]: With dead ends: 2493 [2022-02-15 03:40:25,409 INFO L226 Difference]: Without dead ends: 2444 [2022-02-15 03:40:25,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:40:25,409 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 346 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:25,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 189 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:40:25,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2022-02-15 03:40:26,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 728. [2022-02-15 03:40:26,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 723 states have (on average 1.1300138312586445) internal successors, (817), 723 states have internal predecessors, (817), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:26,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 821 transitions. [2022-02-15 03:40:26,330 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 821 transitions. Word has length 75 [2022-02-15 03:40:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:26,331 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 821 transitions. [2022-02-15 03:40:26,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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) [2022-02-15 03:40:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 821 transitions. [2022-02-15 03:40:26,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 03:40:26,332 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:26,332 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 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] [2022-02-15 03:40:26,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 03:40:26,332 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:26,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:26,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1267467800, now seen corresponding path program 20 times [2022-02-15 03:40:26,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:26,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46762889] [2022-02-15 03:40:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:26,333 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:26,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:26,334 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:26,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:26,443 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:26,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46762889] [2022-02-15 03:40:26,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [46762889] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:26,443 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:26,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:40:26,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351467355] [2022-02-15 03:40:26,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:26,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:40:26,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:26,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:40:26,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:40:26,444 INFO L87 Difference]: Start difference. First operand 728 states and 821 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2022-02-15 03:40:29,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:29,136 INFO L93 Difference]: Finished difference Result 1618 states and 1853 transitions. [2022-02-15 03:40:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:40:29,137 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 76 [2022-02-15 03:40:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:29,139 INFO L225 Difference]: With dead ends: 1618 [2022-02-15 03:40:29,139 INFO L226 Difference]: Without dead ends: 1533 [2022-02-15 03:40:29,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:40:29,140 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 280 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:29,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 99 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:40:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2022-02-15 03:40:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 728. [2022-02-15 03:40:30,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 723 states have (on average 1.1300138312586445) internal successors, (817), 723 states have internal predecessors, (817), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 821 transitions. [2022-02-15 03:40:30,057 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 821 transitions. Word has length 76 [2022-02-15 03:40:30,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:30,057 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 821 transitions. [2022-02-15 03:40:30,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2022-02-15 03:40:30,057 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 821 transitions. [2022-02-15 03:40:30,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 03:40:30,058 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:30,058 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:30,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 03:40:30,059 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:30,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1780671001, now seen corresponding path program 12 times [2022-02-15 03:40:30,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:30,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509398415] [2022-02-15 03:40:30,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:30,060 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:30,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:30,061 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:30,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:30,239 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:30,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509398415] [2022-02-15 03:40:30,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1509398415] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:30,239 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:30,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:40:30,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648058836] [2022-02-15 03:40:30,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:30,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:40:30,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:30,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:40:30,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:40:30,240 INFO L87 Difference]: Start difference. First operand 728 states and 821 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2022-02-15 03:40:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:37,417 INFO L93 Difference]: Finished difference Result 3724 states and 4308 transitions. [2022-02-15 03:40:37,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 03:40:37,418 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 76 [2022-02-15 03:40:37,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:37,423 INFO L225 Difference]: With dead ends: 3724 [2022-02-15 03:40:37,423 INFO L226 Difference]: Without dead ends: 3680 [2022-02-15 03:40:37,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 03:40:37,424 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 435 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4123 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 4145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:37,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 314 Invalid, 4145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4123 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 03:40:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2022-02-15 03:40:38,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 730. [2022-02-15 03:40:38,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 725 states have (on average 1.1310344827586207) internal successors, (820), 725 states have internal predecessors, (820), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 824 transitions. [2022-02-15 03:40:38,379 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 824 transitions. Word has length 76 [2022-02-15 03:40:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:38,380 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 824 transitions. [2022-02-15 03:40:38,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2022-02-15 03:40:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 824 transitions. [2022-02-15 03:40:38,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 03:40:38,380 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:38,381 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-15 03:40:38,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 03:40:38,381 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:38,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1571229253, now seen corresponding path program 21 times [2022-02-15 03:40:38,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:38,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950573583] [2022-02-15 03:40:38,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:38,382 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:38,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:38,383 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:38,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:38,534 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:38,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950573583] [2022-02-15 03:40:38,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1950573583] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:38,534 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:38,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:40:38,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684423502] [2022-02-15 03:40:38,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:38,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:40:38,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:38,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:40:38,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:40:38,535 INFO L87 Difference]: Start difference. First operand 730 states and 824 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 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) [2022-02-15 03:40:43,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:43,883 INFO L93 Difference]: Finished difference Result 2809 states and 3235 transitions. [2022-02-15 03:40:43,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:40:43,883 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 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 77 [2022-02-15 03:40:43,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:43,887 INFO L225 Difference]: With dead ends: 2809 [2022-02-15 03:40:43,887 INFO L226 Difference]: Without dead ends: 2760 [2022-02-15 03:40:43,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:40:43,888 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 376 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:43,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 213 Invalid, 2088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:40:43,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2022-02-15 03:40:44,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 730. [2022-02-15 03:40:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 725 states have (on average 1.1310344827586207) internal successors, (820), 725 states have internal predecessors, (820), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 824 transitions. [2022-02-15 03:40:44,851 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 824 transitions. Word has length 77 [2022-02-15 03:40:44,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:44,851 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 824 transitions. [2022-02-15 03:40:44,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 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) [2022-02-15 03:40:44,852 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 824 transitions. [2022-02-15 03:40:44,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 03:40:44,852 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:44,853 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 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] [2022-02-15 03:40:44,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 03:40:44,853 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:44,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:44,853 INFO L85 PathProgramCache]: Analyzing trace with hash 658034179, now seen corresponding path program 22 times [2022-02-15 03:40:44,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:44,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879564308] [2022-02-15 03:40:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:44,854 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:44,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:44,855 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:44,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:44,970 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:44,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879564308] [2022-02-15 03:40:44,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1879564308] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:44,970 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:44,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:40:44,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530639498] [2022-02-15 03:40:44,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:44,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:40:44,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:44,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:40:44,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:40:44,971 INFO L87 Difference]: Start difference. First operand 730 states and 824 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:48,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:48,542 INFO L93 Difference]: Finished difference Result 1940 states and 2225 transitions. [2022-02-15 03:40:48,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:40:48,542 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 03:40:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:48,545 INFO L225 Difference]: With dead ends: 1940 [2022-02-15 03:40:48,545 INFO L226 Difference]: Without dead ends: 1855 [2022-02-15 03:40:48,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:40:48,545 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 284 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:48,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 133 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:40:48,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2022-02-15 03:40:49,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 730. [2022-02-15 03:40:49,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 725 states have (on average 1.1310344827586207) internal successors, (820), 725 states have internal predecessors, (820), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:49,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 824 transitions. [2022-02-15 03:40:49,526 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 824 transitions. Word has length 78 [2022-02-15 03:40:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:49,526 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 824 transitions. [2022-02-15 03:40:49,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 824 transitions. [2022-02-15 03:40:49,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 03:40:49,527 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:49,528 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:40:49,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 03:40:49,528 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:49,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:49,528 INFO L85 PathProgramCache]: Analyzing trace with hash -588794316, now seen corresponding path program 13 times [2022-02-15 03:40:49,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:49,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439067961] [2022-02-15 03:40:49,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:49,529 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:49,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:49,530 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:49,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:49,746 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:49,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439067961] [2022-02-15 03:40:49,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1439067961] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:49,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:49,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:40:49,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993743461] [2022-02-15 03:40:49,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:49,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:40:49,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:49,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:40:49,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:40:49,747 INFO L87 Difference]: Start difference. First operand 730 states and 824 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2022-02-15 03:40:58,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:40:58,115 INFO L93 Difference]: Finished difference Result 4040 states and 4674 transitions. [2022-02-15 03:40:58,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 03:40:58,115 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 78 [2022-02-15 03:40:58,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:40:58,120 INFO L225 Difference]: With dead ends: 4040 [2022-02-15 03:40:58,120 INFO L226 Difference]: Without dead ends: 3996 [2022-02-15 03:40:58,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 03:40:58,121 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 479 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 4495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:40:58,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 333 Invalid, 4495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 03:40:58,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3996 states. [2022-02-15 03:40:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3996 to 732. [2022-02-15 03:40:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 727 states have (on average 1.1320495185694635) internal successors, (823), 727 states have internal predecessors, (823), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:40:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 827 transitions. [2022-02-15 03:40:59,144 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 827 transitions. Word has length 78 [2022-02-15 03:40:59,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:40:59,145 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 827 transitions. [2022-02-15 03:40:59,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2022-02-15 03:40:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 827 transitions. [2022-02-15 03:40:59,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 03:40:59,146 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:40:59,146 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-15 03:40:59,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 03:40:59,146 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:40:59,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:40:59,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2010210048, now seen corresponding path program 23 times [2022-02-15 03:40:59,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:40:59,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222049441] [2022-02-15 03:40:59,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:40:59,147 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:40:59,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:40:59,148 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:40:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:59,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:40:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:40:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:40:59,319 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:40:59,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222049441] [2022-02-15 03:40:59,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [222049441] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:40:59,319 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:40:59,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:40:59,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138820385] [2022-02-15 03:40:59,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:40:59,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:40:59,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:40:59,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:40:59,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:40:59,320 INFO L87 Difference]: Start difference. First operand 732 states and 827 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) [2022-02-15 03:41:05,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:05,790 INFO L93 Difference]: Finished difference Result 3125 states and 3601 transitions. [2022-02-15 03:41:05,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:41:05,791 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 79 [2022-02-15 03:41:05,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:05,795 INFO L225 Difference]: With dead ends: 3125 [2022-02-15 03:41:05,795 INFO L226 Difference]: Without dead ends: 3076 [2022-02-15 03:41:05,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-02-15 03:41:05,796 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 406 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2516 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:05,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 237 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2516 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:41:05,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2022-02-15 03:41:06,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 732. [2022-02-15 03:41:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 727 states have (on average 1.1320495185694635) internal successors, (823), 727 states have internal predecessors, (823), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:06,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 827 transitions. [2022-02-15 03:41:06,829 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 827 transitions. Word has length 79 [2022-02-15 03:41:06,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:06,829 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 827 transitions. [2022-02-15 03:41:06,830 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) [2022-02-15 03:41:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 827 transitions. [2022-02-15 03:41:06,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 03:41:06,830 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:06,831 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 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] [2022-02-15 03:41:06,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 03:41:06,831 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:06,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:06,832 INFO L85 PathProgramCache]: Analyzing trace with hash -65468578, now seen corresponding path program 24 times [2022-02-15 03:41:06,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:06,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931474689] [2022-02-15 03:41:06,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:06,833 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:06,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:06,834 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:06,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:06,981 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:06,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931474689] [2022-02-15 03:41:06,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1931474689] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:06,981 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:06,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:41:06,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651809875] [2022-02-15 03:41:06,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:06,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:41:06,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:06,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:41:06,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:41:06,981 INFO L87 Difference]: Start difference. First operand 732 states and 827 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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) [2022-02-15 03:41:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:11,619 INFO L93 Difference]: Finished difference Result 2299 states and 2642 transitions. [2022-02-15 03:41:11,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:41:11,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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 80 [2022-02-15 03:41:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:11,622 INFO L225 Difference]: With dead ends: 2299 [2022-02-15 03:41:11,622 INFO L226 Difference]: Without dead ends: 2214 [2022-02-15 03:41:11,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:41:11,623 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 386 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:11,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 143 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:41:11,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2022-02-15 03:41:12,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 732. [2022-02-15 03:41:12,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 727 states have (on average 1.1320495185694635) internal successors, (823), 727 states have internal predecessors, (823), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 827 transitions. [2022-02-15 03:41:12,680 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 827 transitions. Word has length 80 [2022-02-15 03:41:12,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:12,680 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 827 transitions. [2022-02-15 03:41:12,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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) [2022-02-15 03:41:12,680 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 827 transitions. [2022-02-15 03:41:12,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 03:41:12,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:12,681 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:12,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 03:41:12,681 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:12,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1312297073, now seen corresponding path program 14 times [2022-02-15 03:41:12,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:12,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911637483] [2022-02-15 03:41:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:12,682 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:12,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:12,683 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:12,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:12,887 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:12,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911637483] [2022-02-15 03:41:12,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [911637483] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:12,887 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:12,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 03:41:12,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396746821] [2022-02-15 03:41:12,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:12,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 03:41:12,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:12,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 03:41:12,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:41:12,888 INFO L87 Difference]: Start difference. First operand 732 states and 827 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-02-15 03:41:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:22,797 INFO L93 Difference]: Finished difference Result 4356 states and 5040 transitions. [2022-02-15 03:41:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 03:41:22,798 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 80 [2022-02-15 03:41:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:22,803 INFO L225 Difference]: With dead ends: 4356 [2022-02-15 03:41:22,803 INFO L226 Difference]: Without dead ends: 4312 [2022-02-15 03:41:22,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 03:41:22,804 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 510 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 5134 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 5159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 5134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:22,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 357 Invalid, 5159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 5134 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 03:41:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2022-02-15 03:41:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 734. [2022-02-15 03:41:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 729 states have (on average 1.1330589849108368) internal successors, (826), 729 states have internal predecessors, (826), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 830 transitions. [2022-02-15 03:41:23,919 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 830 transitions. Word has length 80 [2022-02-15 03:41:23,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:23,919 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 830 transitions. [2022-02-15 03:41:23,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-02-15 03:41:23,919 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 830 transitions. [2022-02-15 03:41:23,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-15 03:41:23,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:23,920 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:23,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 03:41:23,921 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:23,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:23,921 INFO L85 PathProgramCache]: Analyzing trace with hash 598040280, now seen corresponding path program 25 times [2022-02-15 03:41:23,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:23,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558539801] [2022-02-15 03:41:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:23,922 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:23,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:23,923 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:24,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:24,018 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:24,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558539801] [2022-02-15 03:41:24,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1558539801] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:24,018 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:24,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:41:24,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244504257] [2022-02-15 03:41:24,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:24,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:41:24,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:24,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:41:24,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:41:24,019 INFO L87 Difference]: Start difference. First operand 734 states and 830 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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) [2022-02-15 03:41:25,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:25,303 INFO L93 Difference]: Finished difference Result 879 states and 992 transitions. [2022-02-15 03:41:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:41:25,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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 81 [2022-02-15 03:41:25,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:25,305 INFO L225 Difference]: With dead ends: 879 [2022-02-15 03:41:25,305 INFO L226 Difference]: Without dead ends: 616 [2022-02-15 03:41:25,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:41:25,306 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 110 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:25,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 81 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:41:25,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-02-15 03:41:26,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 555. [2022-02-15 03:41:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 550 states have (on average 1.1454545454545455) internal successors, (630), 550 states have internal predecessors, (630), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:26,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 634 transitions. [2022-02-15 03:41:26,187 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 634 transitions. Word has length 81 [2022-02-15 03:41:26,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:26,187 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 634 transitions. [2022-02-15 03:41:26,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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) [2022-02-15 03:41:26,187 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 634 transitions. [2022-02-15 03:41:26,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-15 03:41:26,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:26,188 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-15 03:41:26,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 03:41:26,188 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:26,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:26,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1331008261, now seen corresponding path program 26 times [2022-02-15 03:41:26,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:26,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899602896] [2022-02-15 03:41:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:26,189 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:26,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:26,190 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:26,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:26,393 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:26,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899602896] [2022-02-15 03:41:26,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [899602896] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:26,394 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:26,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:41:26,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959829813] [2022-02-15 03:41:26,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:26,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:41:26,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:26,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:41:26,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:41:26,394 INFO L87 Difference]: Start difference. First operand 555 states and 634 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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) [2022-02-15 03:41:33,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:33,993 INFO L93 Difference]: Finished difference Result 3249 states and 3755 transitions. [2022-02-15 03:41:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 03:41:33,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 81 [2022-02-15 03:41:33,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:33,997 INFO L225 Difference]: With dead ends: 3249 [2022-02-15 03:41:33,997 INFO L226 Difference]: Without dead ends: 3200 [2022-02-15 03:41:33,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:41:33,998 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 437 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3016 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 3046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:33,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 261 Invalid, 3046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3016 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 03:41:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2022-02-15 03:41:34,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 555. [2022-02-15 03:41:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 550 states have (on average 1.1454545454545455) internal successors, (630), 550 states have internal predecessors, (630), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 634 transitions. [2022-02-15 03:41:34,910 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 634 transitions. Word has length 81 [2022-02-15 03:41:34,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:34,911 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 634 transitions. [2022-02-15 03:41:34,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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) [2022-02-15 03:41:34,911 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 634 transitions. [2022-02-15 03:41:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 03:41:34,911 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:34,911 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:34,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 03:41:34,912 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:34,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1790824352, now seen corresponding path program 27 times [2022-02-15 03:41:34,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:34,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694299542] [2022-02-15 03:41:34,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:34,913 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:34,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:34,914 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:35,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:35,217 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:35,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694299542] [2022-02-15 03:41:35,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1694299542] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:35,217 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:35,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:41:35,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468827391] [2022-02-15 03:41:35,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:35,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:41:35,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:35,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:41:35,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:41:35,218 INFO L87 Difference]: Start difference. First operand 555 states and 634 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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) [2022-02-15 03:41:36,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:36,532 INFO L93 Difference]: Finished difference Result 606 states and 689 transitions. [2022-02-15 03:41:36,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:41:36,533 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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 82 [2022-02-15 03:41:36,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:36,533 INFO L225 Difference]: With dead ends: 606 [2022-02-15 03:41:36,533 INFO L226 Difference]: Without dead ends: 401 [2022-02-15 03:41:36,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:41:36,534 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 182 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:36,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 41 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:41:36,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-02-15 03:41:37,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2022-02-15 03:41:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 396 states have (on average 1.1792929292929293) internal successors, (467), 396 states have internal predecessors, (467), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 471 transitions. [2022-02-15 03:41:37,240 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 471 transitions. Word has length 82 [2022-02-15 03:41:37,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:37,241 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 471 transitions. [2022-02-15 03:41:37,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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) [2022-02-15 03:41:37,241 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 471 transitions. [2022-02-15 03:41:37,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 03:41:37,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:37,241 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 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] [2022-02-15 03:41:37,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 03:41:37,242 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:37,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:37,242 INFO L85 PathProgramCache]: Analyzing trace with hash 433083897, now seen corresponding path program 28 times [2022-02-15 03:41:37,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:37,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977268027] [2022-02-15 03:41:37,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:37,243 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:37,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:37,244 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:37,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:37,405 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:37,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977268027] [2022-02-15 03:41:37,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [977268027] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:37,406 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:37,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:41:37,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595661337] [2022-02-15 03:41:37,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:37,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:41:37,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:41:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:41:37,406 INFO L87 Difference]: Start difference. First operand 401 states and 471 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2022-02-15 03:41:42,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:42,669 INFO L93 Difference]: Finished difference Result 2227 states and 2586 transitions. [2022-02-15 03:41:42,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:41:42,669 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 82 [2022-02-15 03:41:42,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:42,671 INFO L225 Difference]: With dead ends: 2227 [2022-02-15 03:41:42,672 INFO L226 Difference]: Without dead ends: 2142 [2022-02-15 03:41:42,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:41:42,672 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 348 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:42,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 168 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:41:42,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2022-02-15 03:41:43,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 401. [2022-02-15 03:41:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 396 states have (on average 1.1792929292929293) internal successors, (467), 396 states have internal predecessors, (467), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 471 transitions. [2022-02-15 03:41:43,402 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 471 transitions. Word has length 82 [2022-02-15 03:41:43,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:43,402 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 471 transitions. [2022-02-15 03:41:43,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2022-02-15 03:41:43,402 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 471 transitions. [2022-02-15 03:41:43,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 03:41:43,403 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:43,403 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:41:43,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 03:41:43,403 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:43,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:43,403 INFO L85 PathProgramCache]: Analyzing trace with hash -813744598, now seen corresponding path program 15 times [2022-02-15 03:41:43,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:43,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101886138] [2022-02-15 03:41:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:43,404 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:43,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:43,405 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:43,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:43,627 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:43,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101886138] [2022-02-15 03:41:43,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2101886138] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:43,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:43,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 03:41:43,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554449707] [2022-02-15 03:41:43,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:43,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 03:41:43,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:43,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 03:41:43,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2022-02-15 03:41:43,628 INFO L87 Difference]: Start difference. First operand 401 states and 471 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-02-15 03:41:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:41:54,683 INFO L93 Difference]: Finished difference Result 4284 states and 4984 transitions. [2022-02-15 03:41:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 03:41:54,683 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 82 [2022-02-15 03:41:54,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:41:54,687 INFO L225 Difference]: With dead ends: 4284 [2022-02-15 03:41:54,687 INFO L226 Difference]: Without dead ends: 4240 [2022-02-15 03:41:54,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 03:41:54,688 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 511 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 5503 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 5529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 5503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:41:54,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 362 Invalid, 5529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 5503 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 03:41:54,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2022-02-15 03:41:55,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 403. [2022-02-15 03:41:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 398 states have (on average 1.1809045226130652) internal successors, (470), 398 states have internal predecessors, (470), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:41:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 474 transitions. [2022-02-15 03:41:55,470 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 474 transitions. Word has length 82 [2022-02-15 03:41:55,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:41:55,471 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 474 transitions. [2022-02-15 03:41:55,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2022-02-15 03:41:55,471 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 474 transitions. [2022-02-15 03:41:55,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 03:41:55,471 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:41:55,471 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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, 1, 1, 1, 1, 1] [2022-02-15 03:41:55,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 03:41:55,471 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:41:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:41:55,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1126702179, now seen corresponding path program 29 times [2022-02-15 03:41:55,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:41:55,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602398878] [2022-02-15 03:41:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:41:55,473 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:41:55,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:41:55,474 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:41:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:56,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:41:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:41:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:41:56,364 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:41:56,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602398878] [2022-02-15 03:41:56,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1602398878] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:41:56,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:41:56,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 03:41:56,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3723760] [2022-02-15 03:41:56,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:41:56,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 03:41:56,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:41:56,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 03:41:56,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:41:56,365 INFO L87 Difference]: Start difference. First operand 403 states and 474 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 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) [2022-02-15 03:42:00,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:00,553 INFO L93 Difference]: Finished difference Result 1458 states and 1705 transitions. [2022-02-15 03:42:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 03:42:00,553 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 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 83 [2022-02-15 03:42:00,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:00,554 INFO L225 Difference]: With dead ends: 1458 [2022-02-15 03:42:00,554 INFO L226 Difference]: Without dead ends: 1264 [2022-02-15 03:42:00,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=422, Invalid=2334, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 03:42:00,555 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 345 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:00,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 92 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:42:00,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-02-15 03:42:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 578. [2022-02-15 03:42:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 573 states have (on average 1.169284467713787) internal successors, (670), 573 states have internal predecessors, (670), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:01,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 674 transitions. [2022-02-15 03:42:01,748 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 674 transitions. Word has length 83 [2022-02-15 03:42:01,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:01,748 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 674 transitions. [2022-02-15 03:42:01,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 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) [2022-02-15 03:42:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 674 transitions. [2022-02-15 03:42:01,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 03:42:01,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:01,749 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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, 1, 1, 1, 1, 1] [2022-02-15 03:42:01,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 03:42:01,750 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:01,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:01,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2049500001, now seen corresponding path program 30 times [2022-02-15 03:42:01,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:01,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149874947] [2022-02-15 03:42:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:01,751 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:01,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:01,752 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:02,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:42:02,895 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:02,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149874947] [2022-02-15 03:42:02,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [149874947] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:02,895 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:02,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 03:42:02,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273995849] [2022-02-15 03:42:02,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:02,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 03:42:02,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:02,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 03:42:02,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:42:02,896 INFO L87 Difference]: Start difference. First operand 578 states and 674 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:08,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:08,061 INFO L93 Difference]: Finished difference Result 1625 states and 1895 transitions. [2022-02-15 03:42:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 03:42:08,061 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 03:42:08,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:08,063 INFO L225 Difference]: With dead ends: 1625 [2022-02-15 03:42:08,063 INFO L226 Difference]: Without dead ends: 1419 [2022-02-15 03:42:08,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=341, Invalid=1915, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 03:42:08,064 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 503 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:08,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 108 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1739 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:42:08,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2022-02-15 03:42:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 688. [2022-02-15 03:42:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 683 states have (on average 1.16398243045388) internal successors, (795), 683 states have internal predecessors, (795), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 799 transitions. [2022-02-15 03:42:09,547 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 799 transitions. Word has length 83 [2022-02-15 03:42:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:09,547 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 799 transitions. [2022-02-15 03:42:09,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:09,547 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 799 transitions. [2022-02-15 03:42:09,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 03:42:09,548 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:09,548 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 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, 1, 1] [2022-02-15 03:42:09,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 03:42:09,548 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:09,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:09,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1737453601, now seen corresponding path program 31 times [2022-02-15 03:42:09,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:09,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919355056] [2022-02-15 03:42:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:09,549 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:09,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:09,551 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:09,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:42:09,973 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:09,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919355056] [2022-02-15 03:42:09,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [919355056] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:09,973 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:09,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:42:09,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222909590] [2022-02-15 03:42:09,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:09,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:42:09,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:09,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:42:09,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:42:09,976 INFO L87 Difference]: Start difference. First operand 688 states and 799 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:13,061 INFO L93 Difference]: Finished difference Result 1275 states and 1463 transitions. [2022-02-15 03:42:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:42:13,061 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 03:42:13,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:13,063 INFO L225 Difference]: With dead ends: 1275 [2022-02-15 03:42:13,063 INFO L226 Difference]: Without dead ends: 1200 [2022-02-15 03:42:13,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:42:13,063 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 220 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:13,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 50 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:42:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-02-15 03:42:15,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1008. [2022-02-15 03:42:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1003 states have (on average 1.152542372881356) internal successors, (1156), 1003 states have internal predecessors, (1156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1160 transitions. [2022-02-15 03:42:15,328 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1160 transitions. Word has length 83 [2022-02-15 03:42:15,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:15,328 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 1160 transitions. [2022-02-15 03:42:15,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1160 transitions. [2022-02-15 03:42:15,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 03:42:15,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:15,330 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 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, 1, 1] [2022-02-15 03:42:15,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 03:42:15,330 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:15,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:15,330 INFO L85 PathProgramCache]: Analyzing trace with hash -735580963, now seen corresponding path program 32 times [2022-02-15 03:42:15,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:15,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104619139] [2022-02-15 03:42:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:15,331 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:15,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:15,332 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:15,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:42:15,874 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:15,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104619139] [2022-02-15 03:42:15,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1104619139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:15,874 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:15,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:42:15,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498800183] [2022-02-15 03:42:15,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:15,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:42:15,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:15,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:42:15,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:42:15,875 INFO L87 Difference]: Start difference. First operand 1008 states and 1160 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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) [2022-02-15 03:42:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:19,883 INFO L93 Difference]: Finished difference Result 1538 states and 1758 transitions. [2022-02-15 03:42:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:42:19,884 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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 83 [2022-02-15 03:42:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:19,885 INFO L225 Difference]: With dead ends: 1538 [2022-02-15 03:42:19,885 INFO L226 Difference]: Without dead ends: 1454 [2022-02-15 03:42:19,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:42:19,885 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 150 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:19,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 87 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:42:19,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-02-15 03:42:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1265. [2022-02-15 03:42:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1260 states have (on average 1.1468253968253967) internal successors, (1445), 1260 states have internal predecessors, (1445), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:22,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1449 transitions. [2022-02-15 03:42:22,784 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1449 transitions. Word has length 83 [2022-02-15 03:42:22,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:22,784 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 1449 transitions. [2022-02-15 03:42:22,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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) [2022-02-15 03:42:22,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1449 transitions. [2022-02-15 03:42:22,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 03:42:22,786 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:22,786 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 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, 1, 1] [2022-02-15 03:42:22,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 03:42:22,786 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:22,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:22,786 INFO L85 PathProgramCache]: Analyzing trace with hash 274871773, now seen corresponding path program 33 times [2022-02-15 03:42:22,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:22,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914949104] [2022-02-15 03:42:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:22,787 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:22,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:22,788 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:23,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:42:23,201 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:23,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914949104] [2022-02-15 03:42:23,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [914949104] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:23,201 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:23,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:42:23,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756614618] [2022-02-15 03:42:23,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:23,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:42:23,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:23,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:42:23,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:42:23,202 INFO L87 Difference]: Start difference. First operand 1265 states and 1449 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:27,320 INFO L93 Difference]: Finished difference Result 1555 states and 1766 transitions. [2022-02-15 03:42:27,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:42:27,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 03:42:27,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:27,322 INFO L225 Difference]: With dead ends: 1555 [2022-02-15 03:42:27,322 INFO L226 Difference]: Without dead ends: 1495 [2022-02-15 03:42:27,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:42:27,323 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 168 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:27,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 55 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:42:27,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2022-02-15 03:42:30,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1342. [2022-02-15 03:42:30,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1337 states have (on average 1.1361256544502618) internal successors, (1519), 1337 states have internal predecessors, (1519), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:30,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1523 transitions. [2022-02-15 03:42:30,564 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1523 transitions. Word has length 83 [2022-02-15 03:42:30,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:30,565 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 1523 transitions. [2022-02-15 03:42:30,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:30,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1523 transitions. [2022-02-15 03:42:30,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 03:42:30,566 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:30,566 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 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, 1, 1] [2022-02-15 03:42:30,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 03:42:30,566 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:30,567 INFO L85 PathProgramCache]: Analyzing trace with hash 81092769, now seen corresponding path program 34 times [2022-02-15 03:42:30,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:30,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697424228] [2022-02-15 03:42:30,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:30,568 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:30,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:30,569 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:31,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:42:31,062 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:31,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697424228] [2022-02-15 03:42:31,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1697424228] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:31,062 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:31,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:42:31,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706175189] [2022-02-15 03:42:31,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:31,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:42:31,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:31,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:42:31,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:42:31,063 INFO L87 Difference]: Start difference. First operand 1342 states and 1523 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2022-02-15 03:42:35,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:35,197 INFO L93 Difference]: Finished difference Result 1549 states and 1753 transitions. [2022-02-15 03:42:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:42:35,197 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 83 [2022-02-15 03:42:35,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:35,199 INFO L225 Difference]: With dead ends: 1549 [2022-02-15 03:42:35,199 INFO L226 Difference]: Without dead ends: 1498 [2022-02-15 03:42:35,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:42:35,199 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 211 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:35,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 70 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:42:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2022-02-15 03:42:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1335. [2022-02-15 03:42:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1330 states have (on average 1.1345864661654135) internal successors, (1509), 1330 states have internal predecessors, (1509), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:38,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1513 transitions. [2022-02-15 03:42:38,420 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1513 transitions. Word has length 83 [2022-02-15 03:42:38,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:38,421 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 1513 transitions. [2022-02-15 03:42:38,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2022-02-15 03:42:38,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1513 transitions. [2022-02-15 03:42:38,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 03:42:38,422 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:38,422 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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, 1, 1, 1, 1, 1] [2022-02-15 03:42:38,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 03:42:38,422 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:38,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:38,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1189511131, now seen corresponding path program 35 times [2022-02-15 03:42:38,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:38,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800331514] [2022-02-15 03:42:38,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:38,424 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:38,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:38,425 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:39,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:42:39,360 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:39,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800331514] [2022-02-15 03:42:39,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1800331514] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:39,360 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:39,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 03:42:39,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411770556] [2022-02-15 03:42:39,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:39,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 03:42:39,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:39,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 03:42:39,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:42:39,361 INFO L87 Difference]: Start difference. First operand 1335 states and 1513 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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) [2022-02-15 03:42:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:47,496 INFO L93 Difference]: Finished difference Result 2454 states and 2762 transitions. [2022-02-15 03:42:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 03:42:47,496 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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 83 [2022-02-15 03:42:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:47,499 INFO L225 Difference]: With dead ends: 2454 [2022-02-15 03:42:47,499 INFO L226 Difference]: Without dead ends: 2449 [2022-02-15 03:42:47,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=412, Invalid=2240, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 03:42:47,500 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 324 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:47,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 119 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 03:42:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2022-02-15 03:42:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1335. [2022-02-15 03:42:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1330 states have (on average 1.1345864661654135) internal successors, (1509), 1330 states have internal predecessors, (1509), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:42:50,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1513 transitions. [2022-02-15 03:42:50,900 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1513 transitions. Word has length 83 [2022-02-15 03:42:50,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:42:50,900 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 1513 transitions. [2022-02-15 03:42:50,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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) [2022-02-15 03:42:50,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1513 transitions. [2022-02-15 03:42:50,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 03:42:50,902 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:42:50,902 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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, 1, 1, 1, 1, 1] [2022-02-15 03:42:50,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 03:42:50,902 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:42:50,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:42:50,903 INFO L85 PathProgramCache]: Analyzing trace with hash 438642597, now seen corresponding path program 36 times [2022-02-15 03:42:50,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:42:50,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960773444] [2022-02-15 03:42:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:42:50,904 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:42:50,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:42:50,905 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:42:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:51,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:42:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:42:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:42:51,773 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:42:51,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960773444] [2022-02-15 03:42:51,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1960773444] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:42:51,773 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:42:51,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:42:51,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275392009] [2022-02-15 03:42:51,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:42:51,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:42:51,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:42:51,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:42:51,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:42:51,774 INFO L87 Difference]: Start difference. First operand 1335 states and 1513 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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) [2022-02-15 03:42:59,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:42:59,640 INFO L93 Difference]: Finished difference Result 2394 states and 2696 transitions. [2022-02-15 03:42:59,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 03:42:59,641 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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 83 [2022-02-15 03:42:59,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:42:59,644 INFO L225 Difference]: With dead ends: 2394 [2022-02-15 03:42:59,644 INFO L226 Difference]: Without dead ends: 2389 [2022-02-15 03:42:59,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 03:42:59,644 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 342 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:42:59,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 95 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:42:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2022-02-15 03:43:03,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 1335. [2022-02-15 03:43:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1330 states have (on average 1.1345864661654135) internal successors, (1509), 1330 states have internal predecessors, (1509), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:43:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1513 transitions. [2022-02-15 03:43:03,155 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1513 transitions. Word has length 83 [2022-02-15 03:43:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:43:03,155 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 1513 transitions. [2022-02-15 03:43:03,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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) [2022-02-15 03:43:03,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1513 transitions. [2022-02-15 03:43:03,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 03:43:03,156 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:43:03,156 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-15 03:43:03,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 03:43:03,157 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:43:03,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:43:03,157 INFO L85 PathProgramCache]: Analyzing trace with hash -393734198, now seen corresponding path program 37 times [2022-02-15 03:43:03,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:43:03,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749338326] [2022-02-15 03:43:03,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:43:03,158 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:43:03,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:43:03,159 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:43:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:03,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:43:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:43:03,360 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:43:03,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749338326] [2022-02-15 03:43:03,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [749338326] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:43:03,360 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:43:03,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 03:43:03,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96187340] [2022-02-15 03:43:03,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:43:03,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 03:43:03,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:43:03,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 03:43:03,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:43:03,361 INFO L87 Difference]: Start difference. First operand 1335 states and 1513 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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) [2022-02-15 03:43:25,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:43:25,539 INFO L93 Difference]: Finished difference Result 7534 states and 8611 transitions. [2022-02-15 03:43:25,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 03:43:25,540 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 83 [2022-02-15 03:43:25,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:43:25,548 INFO L225 Difference]: With dead ends: 7534 [2022-02-15 03:43:25,548 INFO L226 Difference]: Without dead ends: 7485 [2022-02-15 03:43:25,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 03:43:25,549 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 429 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3530 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 3558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:43:25,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 273 Invalid, 3558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3530 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 03:43:25,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7485 states. [2022-02-15 03:43:28,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7485 to 1335. [2022-02-15 03:43:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1330 states have (on average 1.1345864661654135) internal successors, (1509), 1330 states have internal predecessors, (1509), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:43:28,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1513 transitions. [2022-02-15 03:43:28,978 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1513 transitions. Word has length 83 [2022-02-15 03:43:28,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:43:28,978 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 1513 transitions. [2022-02-15 03:43:28,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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) [2022-02-15 03:43:28,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1513 transitions. [2022-02-15 03:43:28,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-15 03:43:28,980 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:43:28,980 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:43:28,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 03:43:28,980 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:43:28,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:43:28,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1553814021, now seen corresponding path program 16 times [2022-02-15 03:43:28,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:43:28,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707034048] [2022-02-15 03:43:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:43:28,981 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:43:28,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:43:28,983 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:43:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:29,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:43:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:43:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:43:29,204 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:43:29,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707034048] [2022-02-15 03:43:29,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1707034048] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:43:29,204 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:43:29,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 03:43:29,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255157601] [2022-02-15 03:43:29,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:43:29,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 03:43:29,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:43:29,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 03:43:29,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:43:29,205 INFO L87 Difference]: Start difference. First operand 1335 states and 1513 transitions. Second operand has 22 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) [2022-02-15 03:44:00,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:44:00,592 INFO L93 Difference]: Finished difference Result 10567 states and 12115 transitions. [2022-02-15 03:44:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 03:44:00,592 INFO L78 Accepts]: Start accepts. Automaton has has 22 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 84 [2022-02-15 03:44:00,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:44:00,603 INFO L225 Difference]: With dead ends: 10567 [2022-02-15 03:44:00,603 INFO L226 Difference]: Without dead ends: 10523 [2022-02-15 03:44:00,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=1520, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 03:44:00,605 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 560 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 6236 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 6262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 6236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:44:00,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 386 Invalid, 6262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 6236 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 03:44:00,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10523 states. [2022-02-15 03:44:04,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10523 to 1337. [2022-02-15 03:44:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1332 states have (on average 1.135135135135135) internal successors, (1512), 1332 states have internal predecessors, (1512), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:44:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1516 transitions. [2022-02-15 03:44:04,151 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1516 transitions. Word has length 84 [2022-02-15 03:44:04,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:44:04,152 INFO L470 AbstractCegarLoop]: Abstraction has 1337 states and 1516 transitions. [2022-02-15 03:44:04,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 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) [2022-02-15 03:44:04,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1516 transitions. [2022-02-15 03:44:04,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 03:44:04,153 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:44:04,153 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 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, 1] [2022-02-15 03:44:04,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 03:44:04,153 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:44:04,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:44:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash -746829022, now seen corresponding path program 38 times [2022-02-15 03:44:04,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:44:04,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228708061] [2022-02-15 03:44:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:44:04,154 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:44:04,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:44:04,156 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:44:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:04,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:44:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:44:04,266 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:44:04,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228708061] [2022-02-15 03:44:04,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [228708061] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:44:04,266 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:44:04,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:44:04,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880763709] [2022-02-15 03:44:04,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:44:04,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:44:04,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:44:04,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:44:04,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:44:04,267 INFO L87 Difference]: Start difference. First operand 1337 states and 1516 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2022-02-15 03:44:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:44:13,447 INFO L93 Difference]: Finished difference Result 3396 states and 3861 transitions. [2022-02-15 03:44:13,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:44:13,447 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 85 [2022-02-15 03:44:13,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:44:13,451 INFO L225 Difference]: With dead ends: 3396 [2022-02-15 03:44:13,451 INFO L226 Difference]: Without dead ends: 3155 [2022-02-15 03:44:13,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:44:13,451 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 338 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:44:13,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 91 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:44:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3155 states. [2022-02-15 03:44:17,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 1527. [2022-02-15 03:44:17,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1522 states have (on average 1.135348226018397) internal successors, (1728), 1522 states have internal predecessors, (1728), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:44:17,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 1732 transitions. [2022-02-15 03:44:17,410 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 1732 transitions. Word has length 85 [2022-02-15 03:44:17,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:44:17,410 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 1732 transitions. [2022-02-15 03:44:17,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2022-02-15 03:44:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 1732 transitions. [2022-02-15 03:44:17,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 03:44:17,412 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:44:17,412 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-15 03:44:17,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 03:44:17,412 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:44:17,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:44:17,412 INFO L85 PathProgramCache]: Analyzing trace with hash -13861041, now seen corresponding path program 39 times [2022-02-15 03:44:17,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:44:17,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252610748] [2022-02-15 03:44:17,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:44:17,413 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:44:17,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:44:17,415 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:44:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:17,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:44:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:44:17,654 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:44:17,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252610748] [2022-02-15 03:44:17,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [252610748] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:44:17,654 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:44:17,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:44:17,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479195644] [2022-02-15 03:44:17,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:44:17,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:44:17,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:44:17,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:44:17,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:44:17,655 INFO L87 Difference]: Start difference. First operand 1527 states and 1732 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:44:42,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:44:42,799 INFO L93 Difference]: Finished difference Result 8290 states and 9477 transitions. [2022-02-15 03:44:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 03:44:42,799 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-02-15 03:44:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:44:42,808 INFO L225 Difference]: With dead ends: 8290 [2022-02-15 03:44:42,808 INFO L226 Difference]: Without dead ends: 8241 [2022-02-15 03:44:42,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 03:44:42,809 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 476 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3889 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 3919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:44:42,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 292 Invalid, 3919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3889 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 03:44:42,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8241 states. [2022-02-15 03:44:46,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8241 to 1527. [2022-02-15 03:44:46,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1522 states have (on average 1.135348226018397) internal successors, (1728), 1522 states have internal predecessors, (1728), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:44:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 1732 transitions. [2022-02-15 03:44:46,889 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 1732 transitions. Word has length 85 [2022-02-15 03:44:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:44:46,889 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 1732 transitions. [2022-02-15 03:44:46,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:44:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 1732 transitions. [2022-02-15 03:44:46,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 03:44:46,890 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:44:46,890 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:44:46,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 03:44:46,891 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:44:46,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:44:46,891 INFO L85 PathProgramCache]: Analyzing trace with hash 444980000, now seen corresponding path program 17 times [2022-02-15 03:44:46,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:44:46,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078821673] [2022-02-15 03:44:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:44:46,892 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:44:46,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:44:46,893 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:44:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:47,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:44:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:44:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:44:47,143 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:44:47,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078821673] [2022-02-15 03:44:47,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2078821673] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:44:47,143 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:44:47,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:44:47,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894022979] [2022-02-15 03:44:47,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:44:47,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:44:47,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:44:47,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:44:47,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:44:47,144 INFO L87 Difference]: Start difference. First operand 1527 states and 1732 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:45:23,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:45:23,032 INFO L93 Difference]: Finished difference Result 11323 states and 12981 transitions. [2022-02-15 03:45:23,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 03:45:23,032 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 03:45:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:45:23,044 INFO L225 Difference]: With dead ends: 11323 [2022-02-15 03:45:23,044 INFO L226 Difference]: Without dead ends: 11279 [2022-02-15 03:45:23,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=1680, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 03:45:23,046 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 586 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 7376 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 7403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 7376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:45:23,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 415 Invalid, 7403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 7376 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-15 03:45:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11279 states. [2022-02-15 03:45:27,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11279 to 1529. [2022-02-15 03:45:27,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1524 states have (on average 1.1358267716535433) internal successors, (1731), 1524 states have internal predecessors, (1731), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:45:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 1735 transitions. [2022-02-15 03:45:27,199 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 1735 transitions. Word has length 86 [2022-02-15 03:45:27,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:45:27,199 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 1735 transitions. [2022-02-15 03:45:27,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:45:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 1735 transitions. [2022-02-15 03:45:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-15 03:45:27,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:45:27,201 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 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, 1] [2022-02-15 03:45:27,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 03:45:27,201 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:45:27,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:45:27,202 INFO L85 PathProgramCache]: Analyzing trace with hash -760945305, now seen corresponding path program 40 times [2022-02-15 03:45:27,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:45:27,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340869657] [2022-02-15 03:45:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:45:27,203 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:45:27,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:45:27,204 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:45:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:27,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:45:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:45:27,336 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:45:27,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340869657] [2022-02-15 03:45:27,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1340869657] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:45:27,336 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:45:27,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:45:27,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357601951] [2022-02-15 03:45:27,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:45:27,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:45:27,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:45:27,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:45:27,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:45:27,336 INFO L87 Difference]: Start difference. First operand 1529 states and 1735 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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) [2022-02-15 03:45:39,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:45:39,034 INFO L93 Difference]: Finished difference Result 4054 states and 4618 transitions. [2022-02-15 03:45:39,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:45:39,034 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 87 [2022-02-15 03:45:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:45:39,038 INFO L225 Difference]: With dead ends: 4054 [2022-02-15 03:45:39,038 INFO L226 Difference]: Without dead ends: 3813 [2022-02-15 03:45:39,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:45:39,039 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 275 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:45:39,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 128 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:45:39,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2022-02-15 03:45:43,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1529. [2022-02-15 03:45:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1524 states have (on average 1.1358267716535433) internal successors, (1731), 1524 states have internal predecessors, (1731), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:45:43,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 1735 transitions. [2022-02-15 03:45:43,233 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 1735 transitions. Word has length 87 [2022-02-15 03:45:43,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:45:43,233 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 1735 transitions. [2022-02-15 03:45:43,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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) [2022-02-15 03:45:43,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 1735 transitions. [2022-02-15 03:45:43,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-15 03:45:43,235 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:45:43,235 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-15 03:45:43,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 03:45:43,235 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:45:43,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:45:43,235 INFO L85 PathProgramCache]: Analyzing trace with hash -27977324, now seen corresponding path program 41 times [2022-02-15 03:45:43,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:45:43,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047596211] [2022-02-15 03:45:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:45:43,236 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:45:43,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:45:43,237 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:45:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:43,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:45:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:45:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:45:43,458 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:45:43,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047596211] [2022-02-15 03:45:43,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1047596211] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:45:43,458 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:45:43,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 03:45:43,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718691822] [2022-02-15 03:45:43,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:45:43,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 03:45:43,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:45:43,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 03:45:43,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:45:43,459 INFO L87 Difference]: Start difference. First operand 1529 states and 1735 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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) [2022-02-15 03:46:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:46:12,952 INFO L93 Difference]: Finished difference Result 9046 states and 10343 transitions. [2022-02-15 03:46:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 03:46:12,952 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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 87 [2022-02-15 03:46:12,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:46:12,962 INFO L225 Difference]: With dead ends: 9046 [2022-02-15 03:46:12,963 INFO L226 Difference]: Without dead ends: 8997 [2022-02-15 03:46:12,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 03:46:12,964 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 516 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4509 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 4540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:46:12,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 316 Invalid, 4540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4509 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 03:46:12,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8997 states. [2022-02-15 03:46:17,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8997 to 1529. [2022-02-15 03:46:17,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1524 states have (on average 1.1358267716535433) internal successors, (1731), 1524 states have internal predecessors, (1731), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:46:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 1735 transitions. [2022-02-15 03:46:17,258 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 1735 transitions. Word has length 87 [2022-02-15 03:46:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:46:17,258 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 1735 transitions. [2022-02-15 03:46:17,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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) [2022-02-15 03:46:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 1735 transitions. [2022-02-15 03:46:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-15 03:46:17,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:46:17,259 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:46:17,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 03:46:17,260 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:46:17,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:46:17,260 INFO L85 PathProgramCache]: Analyzing trace with hash 7375227, now seen corresponding path program 18 times [2022-02-15 03:46:17,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:46:17,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603433103] [2022-02-15 03:46:17,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:46:17,261 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:46:17,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:46:17,262 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:46:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:46:17,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:46:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:46:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:46:17,526 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:46:17,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603433103] [2022-02-15 03:46:17,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [603433103] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:46:17,526 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:46:17,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 03:46:17,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605392977] [2022-02-15 03:46:17,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:46:17,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 03:46:17,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:46:17,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 03:46:17,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:46:17,527 INFO L87 Difference]: Start difference. First operand 1529 states and 1735 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:46:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:46:58,675 INFO L93 Difference]: Finished difference Result 12079 states and 13847 transitions. [2022-02-15 03:46:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 03:46:58,675 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-02-15 03:46:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:46:58,688 INFO L225 Difference]: With dead ends: 12079 [2022-02-15 03:46:58,689 INFO L226 Difference]: Without dead ends: 12035 [2022-02-15 03:46:58,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 03:46:58,691 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 626 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 8224 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 8252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 8224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:46:58,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 439 Invalid, 8252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 8224 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 03:46:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12035 states. [2022-02-15 03:47:03,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12035 to 1531. [2022-02-15 03:47:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1526 states have (on average 1.1363040629095675) internal successors, (1734), 1526 states have internal predecessors, (1734), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:47:03,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 1738 transitions. [2022-02-15 03:47:03,096 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 1738 transitions. Word has length 88 [2022-02-15 03:47:03,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:47:03,097 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 1738 transitions. [2022-02-15 03:47:03,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:47:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 1738 transitions. [2022-02-15 03:47:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 03:47:03,098 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:47:03,098 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 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, 1] [2022-02-15 03:47:03,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 03:47:03,099 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:47:03,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:47:03,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1441791380, now seen corresponding path program 42 times [2022-02-15 03:47:03,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:47:03,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975756198] [2022-02-15 03:47:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:47:03,100 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:47:03,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:47:03,101 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:47:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:03,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:47:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:47:03,255 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:47:03,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975756198] [2022-02-15 03:47:03,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [975756198] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:47:03,256 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:47:03,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:47:03,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718456463] [2022-02-15 03:47:03,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:47:03,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:47:03,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:47:03,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:47:03,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:47:03,256 INFO L87 Difference]: Start difference. First operand 1531 states and 1738 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:47:18,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:47:18,423 INFO L93 Difference]: Finished difference Result 4846 states and 5520 transitions. [2022-02-15 03:47:18,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:47:18,424 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 03:47:18,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:47:18,428 INFO L225 Difference]: With dead ends: 4846 [2022-02-15 03:47:18,428 INFO L226 Difference]: Without dead ends: 4605 [2022-02-15 03:47:18,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:47:18,429 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 358 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:47:18,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 137 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:47:18,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2022-02-15 03:47:22,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 1531. [2022-02-15 03:47:22,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1526 states have (on average 1.1363040629095675) internal successors, (1734), 1526 states have internal predecessors, (1734), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:47:22,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 1738 transitions. [2022-02-15 03:47:22,889 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 1738 transitions. Word has length 89 [2022-02-15 03:47:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:47:22,889 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 1738 transitions. [2022-02-15 03:47:22,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:47:22,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 1738 transitions. [2022-02-15 03:47:22,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 03:47:22,890 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:47:22,891 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-15 03:47:22,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 03:47:22,891 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:47:22,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:47:22,891 INFO L85 PathProgramCache]: Analyzing trace with hash -708823399, now seen corresponding path program 43 times [2022-02-15 03:47:22,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:47:22,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313059141] [2022-02-15 03:47:22,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:47:22,892 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:47:22,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:47:22,893 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:47:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:23,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:47:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:47:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:47:23,130 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:47:23,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313059141] [2022-02-15 03:47:23,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [313059141] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:47:23,130 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:47:23,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 03:47:23,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008563971] [2022-02-15 03:47:23,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:47:23,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 03:47:23,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:47:23,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 03:47:23,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2022-02-15 03:47:23,130 INFO L87 Difference]: Start difference. First operand 1531 states and 1738 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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) [2022-02-15 03:47:57,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:47:57,322 INFO L93 Difference]: Finished difference Result 9802 states and 11209 transitions. [2022-02-15 03:47:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 03:47:57,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 89 [2022-02-15 03:47:57,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:47:57,332 INFO L225 Difference]: With dead ends: 9802 [2022-02-15 03:47:57,333 INFO L226 Difference]: Without dead ends: 9753 [2022-02-15 03:47:57,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=1436, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 03:47:57,334 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 549 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 5459 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 5490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 5459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:47:57,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 345 Invalid, 5490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 5459 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 03:47:57,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9753 states. [2022-02-15 03:48:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9753 to 1531. [2022-02-15 03:48:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1526 states have (on average 1.1363040629095675) internal successors, (1734), 1526 states have internal predecessors, (1734), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:48:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 1738 transitions. [2022-02-15 03:48:01,822 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 1738 transitions. Word has length 89 [2022-02-15 03:48:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:48:01,823 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 1738 transitions. [2022-02-15 03:48:01,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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) [2022-02-15 03:48:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 1738 transitions. [2022-02-15 03:48:01,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-15 03:48:01,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:48:01,824 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:48:01,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-15 03:48:01,825 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:48:01,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:48:01,825 INFO L85 PathProgramCache]: Analyzing trace with hash 375983382, now seen corresponding path program 19 times [2022-02-15 03:48:01,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:48:01,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214557565] [2022-02-15 03:48:01,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:48:01,826 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:48:01,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:48:01,828 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:48:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:02,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:48:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:48:02,100 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:48:02,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214557565] [2022-02-15 03:48:02,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [214557565] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:48:02,100 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:48:02,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 03:48:02,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837156259] [2022-02-15 03:48:02,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:48:02,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 03:48:02,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:48:02,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 03:48:02,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:48:02,101 INFO L87 Difference]: Start difference. First operand 1531 states and 1738 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2022-02-15 03:48:48,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:48:48,878 INFO L93 Difference]: Finished difference Result 12835 states and 14713 transitions. [2022-02-15 03:48:48,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 03:48:48,878 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 90 [2022-02-15 03:48:48,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:48:48,892 INFO L225 Difference]: With dead ends: 12835 [2022-02-15 03:48:48,893 INFO L226 Difference]: Without dead ends: 12791 [2022-02-15 03:48:48,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=2024, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 03:48:48,895 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 667 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 9118 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 9148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 9118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:48:48,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 463 Invalid, 9148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 9118 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-15 03:48:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12791 states. [2022-02-15 03:48:53,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12791 to 1533. [2022-02-15 03:48:53,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1528 states have (on average 1.1367801047120418) internal successors, (1737), 1528 states have internal predecessors, (1737), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:48:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 1741 transitions. [2022-02-15 03:48:53,469 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 1741 transitions. Word has length 90 [2022-02-15 03:48:53,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:48:53,470 INFO L470 AbstractCegarLoop]: Abstraction has 1533 states and 1741 transitions. [2022-02-15 03:48:53,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2022-02-15 03:48:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 1741 transitions. [2022-02-15 03:48:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-15 03:48:53,471 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:48:53,471 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 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, 1] [2022-02-15 03:48:53,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-15 03:48:53,472 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:48:53,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:48:53,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1395126833, now seen corresponding path program 44 times [2022-02-15 03:48:53,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:48:53,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999401334] [2022-02-15 03:48:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:48:53,473 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:48:53,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:48:53,474 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:48:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:53,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:48:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:48:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:48:53,626 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:48:53,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999401334] [2022-02-15 03:48:53,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1999401334] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:48:53,626 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:48:53,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:48:53,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504152344] [2022-02-15 03:48:53,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:48:53,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:48:53,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:48:53,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:48:53,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:48:53,627 INFO L87 Difference]: Start difference. First operand 1533 states and 1741 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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) [2022-02-15 03:49:12,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:49:12,392 INFO L93 Difference]: Finished difference Result 5556 states and 6332 transitions. [2022-02-15 03:49:12,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 03:49:12,392 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 91 [2022-02-15 03:49:12,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:49:12,398 INFO L225 Difference]: With dead ends: 5556 [2022-02-15 03:49:12,398 INFO L226 Difference]: Without dead ends: 5315 [2022-02-15 03:49:12,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-02-15 03:49:12,399 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 368 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 03:49:12,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 171 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 03:49:12,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5315 states. [2022-02-15 03:49:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5315 to 1487. [2022-02-15 03:49:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1482 states have (on average 1.1356275303643724) internal successors, (1683), 1482 states have internal predecessors, (1683), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:49:16,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 1687 transitions. [2022-02-15 03:49:16,889 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 1687 transitions. Word has length 91 [2022-02-15 03:49:16,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:49:16,890 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 1687 transitions. [2022-02-15 03:49:16,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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) [2022-02-15 03:49:16,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 1687 transitions. [2022-02-15 03:49:16,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-15 03:49:16,891 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:49:16,892 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-15 03:49:16,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-15 03:49:16,892 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:49:16,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:49:16,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2128094814, now seen corresponding path program 45 times [2022-02-15 03:49:16,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:49:16,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703911279] [2022-02-15 03:49:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:49:16,893 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:49:16,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:49:16,894 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:49:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:49:17,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:49:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:49:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:49:17,145 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:49:17,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703911279] [2022-02-15 03:49:17,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1703911279] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:49:17,145 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:49:17,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 03:49:17,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279074129] [2022-02-15 03:49:17,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:49:17,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 03:49:17,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:49:17,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 03:49:17,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:49:17,146 INFO L87 Difference]: Start difference. First operand 1487 states and 1687 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:49:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:49:57,164 INFO L93 Difference]: Finished difference Result 10558 states and 12075 transitions. [2022-02-15 03:49:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 03:49:57,164 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-02-15 03:49:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:49:57,176 INFO L225 Difference]: With dead ends: 10558 [2022-02-15 03:49:57,176 INFO L226 Difference]: Without dead ends: 10509 [2022-02-15 03:49:57,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=1592, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 03:49:57,182 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 597 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 5852 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 5886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 5852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:49:57,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 362 Invalid, 5886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 5852 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 03:49:57,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10509 states. [2022-02-15 03:50:01,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10509 to 1487. [2022-02-15 03:50:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1482 states have (on average 1.1356275303643724) internal successors, (1683), 1482 states have internal predecessors, (1683), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:50:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 1687 transitions. [2022-02-15 03:50:01,824 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 1687 transitions. Word has length 91 [2022-02-15 03:50:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:50:01,824 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 1687 transitions. [2022-02-15 03:50:01,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:50:01,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 1687 transitions. [2022-02-15 03:50:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 03:50:01,826 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:50:01,826 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 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, 1, 1, 1, 1, 1, 1] [2022-02-15 03:50:01,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-15 03:50:01,826 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:50:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:50:01,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1388329719, now seen corresponding path program 46 times [2022-02-15 03:50:01,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:50:01,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319736217] [2022-02-15 03:50:01,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:50:01,827 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:50:01,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:50:01,829 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:50:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:01,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:50:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:50:01,939 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:50:01,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319736217] [2022-02-15 03:50:01,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1319736217] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:50:01,939 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:50:01,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:50:01,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869440279] [2022-02-15 03:50:01,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:50:01,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:50:01,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:50:01,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:50:01,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:50:01,940 INFO L87 Difference]: Start difference. First operand 1487 states and 1687 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:50:07,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:50:07,505 INFO L93 Difference]: Finished difference Result 2399 states and 2720 transitions. [2022-02-15 03:50:07,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:50:07,505 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 03:50:07,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:50:07,507 INFO L225 Difference]: With dead ends: 2399 [2022-02-15 03:50:07,507 INFO L226 Difference]: Without dead ends: 1533 [2022-02-15 03:50:07,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:50:07,508 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 142 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:50:07,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 95 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:50:07,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2022-02-15 03:50:11,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1290. [2022-02-15 03:50:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1285 states have (on average 1.1330739299610895) internal successors, (1456), 1285 states have internal predecessors, (1456), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:50:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1460 transitions. [2022-02-15 03:50:11,685 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1460 transitions. Word has length 92 [2022-02-15 03:50:11,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:50:11,685 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 1460 transitions. [2022-02-15 03:50:11,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:50:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1460 transitions. [2022-02-15 03:50:11,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 03:50:11,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:50:11,686 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:50:11,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-15 03:50:11,687 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:50:11,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:50:11,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1873865231, now seen corresponding path program 20 times [2022-02-15 03:50:11,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:50:11,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477402382] [2022-02-15 03:50:11,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:50:11,688 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:50:11,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:50:11,689 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:50:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:11,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:50:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:50:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:50:11,984 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:50:11,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477402382] [2022-02-15 03:50:11,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [477402382] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:50:11,985 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:50:11,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 03:50:11,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432693561] [2022-02-15 03:50:11,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:50:11,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 03:50:11,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:50:11,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 03:50:11,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2022-02-15 03:50:11,985 INFO L87 Difference]: Start difference. First operand 1290 states and 1460 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 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) [2022-02-15 03:51:03,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:51:03,195 INFO L93 Difference]: Finished difference Result 12954 states and 14837 transitions. [2022-02-15 03:51:03,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 03:51:03,195 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 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 92 [2022-02-15 03:51:03,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:51:03,210 INFO L225 Difference]: With dead ends: 12954 [2022-02-15 03:51:03,210 INFO L226 Difference]: Without dead ends: 12910 [2022-02-15 03:51:03,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=2208, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 03:51:03,213 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 708 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 10058 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 10090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 10058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-15 03:51:03,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 487 Invalid, 10090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 10058 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-15 03:51:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12910 states. [2022-02-15 03:51:07,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12910 to 1292. [2022-02-15 03:51:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1287 states have (on average 1.1336441336441336) internal successors, (1459), 1287 states have internal predecessors, (1459), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:07,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 1463 transitions. [2022-02-15 03:51:07,507 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 1463 transitions. Word has length 92 [2022-02-15 03:51:07,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:51:07,507 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 1463 transitions. [2022-02-15 03:51:07,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 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) [2022-02-15 03:51:07,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 1463 transitions. [2022-02-15 03:51:07,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 03:51:07,508 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:51:07,509 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1] [2022-02-15 03:51:07,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-15 03:51:07,509 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:51:07,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:51:07,509 INFO L85 PathProgramCache]: Analyzing trace with hash 162728781, now seen corresponding path program 47 times [2022-02-15 03:51:07,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:51:07,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060161731] [2022-02-15 03:51:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:51:07,510 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:51:07,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:51:07,511 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:51:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:07,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:51:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:51:07,632 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:51:07,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060161731] [2022-02-15 03:51:07,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1060161731] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:51:07,632 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:51:07,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:51:07,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79851221] [2022-02-15 03:51:07,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:51:07,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:51:07,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:51:07,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:51:07,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:51:07,633 INFO L87 Difference]: Start difference. First operand 1292 states and 1463 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:51:14,427 INFO L93 Difference]: Finished difference Result 1747 states and 1975 transitions. [2022-02-15 03:51:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 03:51:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 03:51:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:51:14,430 INFO L225 Difference]: With dead ends: 1747 [2022-02-15 03:51:14,430 INFO L226 Difference]: Without dead ends: 1742 [2022-02-15 03:51:14,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:51:14,430 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 258 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:51:14,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 186 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:51:14,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2022-02-15 03:51:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1477. [2022-02-15 03:51:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1472 states have (on average 1.1372282608695652) internal successors, (1674), 1472 states have internal predecessors, (1674), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 1678 transitions. [2022-02-15 03:51:19,670 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 1678 transitions. Word has length 93 [2022-02-15 03:51:19,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:51:19,670 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 1678 transitions. [2022-02-15 03:51:19,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:19,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 1678 transitions. [2022-02-15 03:51:19,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 03:51:19,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:51:19,672 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:51:19,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-15 03:51:19,672 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:51:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:51:19,672 INFO L85 PathProgramCache]: Analyzing trace with hash -424077233, now seen corresponding path program 48 times [2022-02-15 03:51:19,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:51:19,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938496762] [2022-02-15 03:51:19,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:51:19,673 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:51:19,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:51:19,674 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:51:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:20,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:51:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:51:20,241 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:51:20,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938496762] [2022-02-15 03:51:20,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1938496762] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:51:20,242 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:51:20,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 03:51:20,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480572142] [2022-02-15 03:51:20,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:51:20,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 03:51:20,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:51:20,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 03:51:20,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:51:20,242 INFO L87 Difference]: Start difference. First operand 1477 states and 1678 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:51:27,751 INFO L93 Difference]: Finished difference Result 1854 states and 2082 transitions. [2022-02-15 03:51:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 03:51:27,751 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 03:51:27,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:51:27,753 INFO L225 Difference]: With dead ends: 1854 [2022-02-15 03:51:27,753 INFO L226 Difference]: Without dead ends: 1813 [2022-02-15 03:51:27,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 03:51:27,754 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 263 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 03:51:27,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 76 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 03:51:27,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2022-02-15 03:51:33,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1585. [2022-02-15 03:51:33,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1580 states have (on average 1.1278481012658228) internal successors, (1782), 1580 states have internal predecessors, (1782), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:33,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 1786 transitions. [2022-02-15 03:51:33,423 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 1786 transitions. Word has length 93 [2022-02-15 03:51:33,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:51:33,423 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 1786 transitions. [2022-02-15 03:51:33,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:33,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 1786 transitions. [2022-02-15 03:51:33,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 03:51:33,425 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:51:33,425 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:51:33,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-15 03:51:33,425 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:51:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:51:33,425 INFO L85 PathProgramCache]: Analyzing trace with hash 221262611, now seen corresponding path program 49 times [2022-02-15 03:51:33,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:51:33,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404761986] [2022-02-15 03:51:33,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:51:33,426 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:51:33,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:51:33,427 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:51:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:34,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:51:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:51:34,347 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:51:34,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404761986] [2022-02-15 03:51:34,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1404761986] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:51:34,348 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:51:34,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 03:51:34,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847006969] [2022-02-15 03:51:34,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:51:34,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 03:51:34,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:51:34,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 03:51:34,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:51:34,348 INFO L87 Difference]: Start difference. First operand 1585 states and 1786 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:51:42,324 INFO L93 Difference]: Finished difference Result 1838 states and 2062 transitions. [2022-02-15 03:51:42,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 03:51:42,325 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 03:51:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:51:42,326 INFO L225 Difference]: With dead ends: 1838 [2022-02-15 03:51:42,326 INFO L226 Difference]: Without dead ends: 1794 [2022-02-15 03:51:42,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 03:51:42,327 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 203 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:51:42,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 117 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:51:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-02-15 03:51:47,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1562. [2022-02-15 03:51:47,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1557 states have (on average 1.1297366730892742) internal successors, (1759), 1557 states have internal predecessors, (1759), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 1763 transitions. [2022-02-15 03:51:47,929 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 1763 transitions. Word has length 93 [2022-02-15 03:51:47,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:51:47,929 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 1763 transitions. [2022-02-15 03:51:47,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:47,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 1763 transitions. [2022-02-15 03:51:47,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 03:51:47,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:51:47,932 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:51:47,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-15 03:51:47,932 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:51:47,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:51:47,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1056215119, now seen corresponding path program 50 times [2022-02-15 03:51:47,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:51:47,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349195528] [2022-02-15 03:51:47,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:51:47,933 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:51:47,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:51:47,934 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:51:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:48,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:51:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:51:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:51:48,755 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:51:48,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349195528] [2022-02-15 03:51:48,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1349195528] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:51:48,755 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:51:48,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 03:51:48,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066627226] [2022-02-15 03:51:48,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:51:48,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 03:51:48,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:51:48,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 03:51:48,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:51:48,756 INFO L87 Difference]: Start difference. First operand 1562 states and 1763 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:51:56,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:51:56,875 INFO L93 Difference]: Finished difference Result 1817 states and 2037 transitions. [2022-02-15 03:51:56,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 03:51:56,876 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 03:51:56,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:51:56,878 INFO L225 Difference]: With dead ends: 1817 [2022-02-15 03:51:56,878 INFO L226 Difference]: Without dead ends: 1799 [2022-02-15 03:51:56,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=1217, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 03:51:56,878 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 254 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 03:51:56,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 107 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 03:51:56,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2022-02-15 03:52:03,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1659. [2022-02-15 03:52:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1654 states have (on average 1.1221281741233373) internal successors, (1856), 1654 states have internal predecessors, (1856), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:52:03,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 1860 transitions. [2022-02-15 03:52:03,292 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 1860 transitions. Word has length 93 [2022-02-15 03:52:03,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:52:03,293 INFO L470 AbstractCegarLoop]: Abstraction has 1659 states and 1860 transitions. [2022-02-15 03:52:03,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:52:03,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 1860 transitions. [2022-02-15 03:52:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 03:52:03,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:52:03,295 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:52:03,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-15 03:52:03,295 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:52:03,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:52:03,295 INFO L85 PathProgramCache]: Analyzing trace with hash 862436115, now seen corresponding path program 51 times [2022-02-15 03:52:03,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:52:03,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376381436] [2022-02-15 03:52:03,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:52:03,296 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:52:03,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:52:03,297 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:52:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:52:04,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:52:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:52:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:52:04,207 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:52:04,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376381436] [2022-02-15 03:52:04,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1376381436] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:52:04,207 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:52:04,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 03:52:04,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395818747] [2022-02-15 03:52:04,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:52:04,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 03:52:04,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:52:04,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 03:52:04,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:52:04,208 INFO L87 Difference]: Start difference. First operand 1659 states and 1860 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:52:12,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:52:12,501 INFO L93 Difference]: Finished difference Result 1806 states and 2022 transitions. [2022-02-15 03:52:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 03:52:12,501 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 03:52:12,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:52:12,503 INFO L225 Difference]: With dead ends: 1806 [2022-02-15 03:52:12,503 INFO L226 Difference]: Without dead ends: 1788 [2022-02-15 03:52:12,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 03:52:12,504 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 235 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 03:52:12,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 65 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 03:52:12,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2022-02-15 03:52:18,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1634. [2022-02-15 03:52:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1629 states have (on average 1.124002455494168) internal successors, (1831), 1629 states have internal predecessors, (1831), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:52:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 1835 transitions. [2022-02-15 03:52:18,773 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 1835 transitions. Word has length 93 [2022-02-15 03:52:18,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:52:18,773 INFO L470 AbstractCegarLoop]: Abstraction has 1634 states and 1835 transitions. [2022-02-15 03:52:18,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:52:18,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 1835 transitions. [2022-02-15 03:52:18,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 03:52:18,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:52:18,775 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 4, 4, 3, 3, 3, 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, 1] [2022-02-15 03:52:18,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-15 03:52:18,775 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:52:18,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:52:18,775 INFO L85 PathProgramCache]: Analyzing trace with hash 369296566, now seen corresponding path program 52 times [2022-02-15 03:52:18,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:52:18,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555593295] [2022-02-15 03:52:18,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:52:18,776 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:52:18,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:52:18,777 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:52:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:52:18,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:52:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:52:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:52:18,945 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:52:18,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555593295] [2022-02-15 03:52:18,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [555593295] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:52:18,945 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:52:18,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:52:18,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781214416] [2022-02-15 03:52:18,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:52:18,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:52:18,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:52:18,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:52:18,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:52:18,945 INFO L87 Difference]: Start difference. First operand 1634 states and 1835 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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) [2022-02-15 03:52:50,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:52:50,420 INFO L93 Difference]: Finished difference Result 7216 states and 8203 transitions. [2022-02-15 03:52:50,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 03:52:50,421 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 93 [2022-02-15 03:52:50,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:52:50,428 INFO L225 Difference]: With dead ends: 7216 [2022-02-15 03:52:50,428 INFO L226 Difference]: Without dead ends: 6998 [2022-02-15 03:52:50,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 03:52:50,429 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 585 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 03:52:50,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 181 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 03:52:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6998 states. [2022-02-15 03:52:56,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6998 to 1634. [2022-02-15 03:52:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1629 states have (on average 1.124002455494168) internal successors, (1831), 1629 states have internal predecessors, (1831), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:52:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 1835 transitions. [2022-02-15 03:52:56,921 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 1835 transitions. Word has length 93 [2022-02-15 03:52:56,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:52:56,921 INFO L470 AbstractCegarLoop]: Abstraction has 1634 states and 1835 transitions. [2022-02-15 03:52:56,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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) [2022-02-15 03:52:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 1835 transitions. [2022-02-15 03:52:56,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 03:52:56,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:52:56,923 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-15 03:52:56,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-15 03:52:56,924 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:52:56,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:52:56,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1102264547, now seen corresponding path program 53 times [2022-02-15 03:52:56,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:52:56,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013305279] [2022-02-15 03:52:56,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:52:56,925 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:52:56,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:52:56,926 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:52:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:52:57,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:52:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:52:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:52:57,192 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:52:57,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013305279] [2022-02-15 03:52:57,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2013305279] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:52:57,192 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:52:57,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 03:52:57,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018621336] [2022-02-15 03:52:57,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:52:57,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 03:52:57,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:52:57,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 03:52:57,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:52:57,193 INFO L87 Difference]: Start difference. First operand 1634 states and 1835 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)