/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/loopv2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 03:41:13,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 03:41:13,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 03:41:13,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 03:41:13,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 03:41:13,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 03:41:13,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 03:41:13,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 03:41:13,655 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 03:41:13,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 03:41:13,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 03:41:13,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 03:41:13,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 03:41:13,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 03:41:13,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 03:41:13,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 03:41:13,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 03:41:13,659 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 03:41:13,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 03:41:13,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 03:41:13,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 03:41:13,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 03:41:13,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 03:41:13,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:41:13,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 03:41:13,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 03:41:13,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 03:41:13,661 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 03:41:13,661 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 03:41:13,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 03:41:13,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 03:41:13,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 03:41:13,896 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 03:41:13,901 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 03:41:13,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv2.c [2022-02-24 03:41:13,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b673309/f0ed0ae4396f43a1b749b38b0f8361ac/FLAGd6f2ff5ff [2022-02-24 03:41:14,367 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 03:41:14,368 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv2.c [2022-02-24 03:41:14,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b673309/f0ed0ae4396f43a1b749b38b0f8361ac/FLAGd6f2ff5ff [2022-02-24 03:41:14,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b673309/f0ed0ae4396f43a1b749b38b0f8361ac [2022-02-24 03:41:14,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 03:41:14,396 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 03:41:14,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 03:41:14,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 03:41:14,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 03:41:14,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:41:14" (1/1) ... [2022-02-24 03:41:14,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea57418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:14, skipping insertion in model container [2022-02-24 03:41:14,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:41:14" (1/1) ... [2022-02-24 03:41:14,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 03:41:14,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 03:41:14,555 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv2.c[454,467] [2022-02-24 03:41:14,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:41:14,590 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 03:41:14,600 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv2.c[454,467] [2022-02-24 03:41:14,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:41:14,613 INFO L208 MainTranslator]: Completed translation [2022-02-24 03:41:14,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:14 WrapperNode [2022-02-24 03:41:14,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 03:41:14,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 03:41:14,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 03:41:14,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 03:41:14,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:14" (1/1) ... [2022-02-24 03:41:14,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:14" (1/1) ... [2022-02-24 03:41:14,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:14" (1/1) ... [2022-02-24 03:41:14,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:14" (1/1) ... [2022-02-24 03:41:14,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:14" (1/1) ... [2022-02-24 03:41:14,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:14" (1/1) ... [2022-02-24 03:41:14,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:14" (1/1) ... [2022-02-24 03:41:14,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 03:41:14,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 03:41:14,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 03:41:14,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 03:41:14,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:14" (1/1) ... [2022-02-24 03:41:14,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:41:14,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 03:41:14,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 03:41:14,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 03:41:14,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 03:41:14,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 03:41:14,699 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 03:41:14,699 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 03:41:14,699 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 03:41:14,699 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 03:41:14,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 03:41:14,700 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 03:41:14,700 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 03:41:14,700 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 03:41:14,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 03:41:14,700 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 03:41:14,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 03:41:14,700 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 03:41:14,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 03:41:14,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 03:41:14,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 03:41:14,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 03:41:14,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 03:41:14,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 03:41:14,755 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 03:41:14,757 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 03:41:14,883 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 03:41:14,890 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 03:41:14,890 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-24 03:41:14,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:41:14 BoogieIcfgContainer [2022-02-24 03:41:14,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 03:41:14,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 03:41:14,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 03:41:14,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 03:41:14,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:41:14" (1/3) ... [2022-02-24 03:41:14,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af2387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:41:14, skipping insertion in model container [2022-02-24 03:41:14,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:41:14" (2/3) ... [2022-02-24 03:41:14,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af2387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:41:14, skipping insertion in model container [2022-02-24 03:41:14,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:41:14" (3/3) ... [2022-02-24 03:41:14,902 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv2.c [2022-02-24 03:41:14,907 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 03:41:14,907 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 03:41:14,950 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 03:41:14,962 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-24 03:41:14,962 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 03:41:14,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 03:41:14,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 03:41:14,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:14,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:14,999 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:15,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:15,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1146993295, now seen corresponding path program 1 times [2022-02-24 03:41:15,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:15,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314556249] [2022-02-24 03:41:15,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:15,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:15,071 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:41:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:15,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:15,280 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:15,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314556249] [2022-02-24 03:41:15,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [314556249] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:15,282 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:15,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 03:41:15,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628924512] [2022-02-24 03:41:15,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:15,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 03:41:15,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:15,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 03:41:15,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 03:41:15,311 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:15,405 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-02-24 03:41:15,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 03:41:15,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-24 03:41:15,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:15,416 INFO L225 Difference]: With dead ends: 39 [2022-02-24 03:41:15,416 INFO L226 Difference]: Without dead ends: 18 [2022-02-24 03:41:15,420 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 [2022-02-24 03:41:15,426 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:15,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:41:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-24 03:41:15,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-02-24 03:41:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-02-24 03:41:15,464 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2022-02-24 03:41:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:15,465 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-02-24 03:41:15,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-02-24 03:41:15,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 03:41:15,466 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:15,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:15,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 03:41:15,467 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:15,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1162558691, now seen corresponding path program 1 times [2022-02-24 03:41:15,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:15,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746570097] [2022-02-24 03:41:15,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:15,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:15,683 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:41:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:15,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:15,979 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:15,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746570097] [2022-02-24 03:41:15,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [746570097] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:15,980 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:15,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:41:15,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959374388] [2022-02-24 03:41:15,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:15,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:41:15,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:15,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:41:15,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:41:15,984 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:16,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:16,129 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-02-24 03:41:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:41:16,130 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-24 03:41:16,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:16,131 INFO L225 Difference]: With dead ends: 24 [2022-02-24 03:41:16,131 INFO L226 Difference]: Without dead ends: 16 [2022-02-24 03:41:16,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:41:16,137 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:16,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 43 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:16,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-24 03:41:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-02-24 03:41:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-02-24 03:41:16,147 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 15 [2022-02-24 03:41:16,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:16,148 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-02-24 03:41:16,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:16,149 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-02-24 03:41:16,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 03:41:16,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:16,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:16,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 03:41:16,151 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1035344830, now seen corresponding path program 1 times [2022-02-24 03:41:16,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:16,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333166836] [2022-02-24 03:41:16,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:16,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:16,409 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:16,409 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:16,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:16,522 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:16,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333166836] [2022-02-24 03:41:16,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [333166836] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:16,524 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:16,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 03:41:16,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20231393] [2022-02-24 03:41:16,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:16,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 03:41:16,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:16,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 03:41:16,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 03:41:16,526 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:16,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:16,577 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-02-24 03:41:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 03:41:16,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-24 03:41:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:16,578 INFO L225 Difference]: With dead ends: 24 [2022-02-24 03:41:16,578 INFO L226 Difference]: Without dead ends: 17 [2022-02-24 03:41:16,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:41:16,584 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:16,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 25 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:41:16,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-24 03:41:16,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-24 03:41:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-02-24 03:41:16,591 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2022-02-24 03:41:16,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:16,592 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-02-24 03:41:16,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:16,592 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-02-24 03:41:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-24 03:41:16,592 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:16,593 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:16,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 03:41:16,593 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:16,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:16,593 INFO L85 PathProgramCache]: Analyzing trace with hash -31650031, now seen corresponding path program 2 times [2022-02-24 03:41:16,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:16,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99413208] [2022-02-24 03:41:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:16,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:16,786 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:16,787 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:16,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:16,887 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:16,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99413208] [2022-02-24 03:41:16,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [99413208] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:16,887 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:16,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:41:16,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120884321] [2022-02-24 03:41:16,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:16,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:41:16,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:16,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:41:16,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:41:16,889 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:16,965 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2022-02-24 03:41:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:41:16,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-02-24 03:41:16,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:16,966 INFO L225 Difference]: With dead ends: 25 [2022-02-24 03:41:16,966 INFO L226 Difference]: Without dead ends: 18 [2022-02-24 03:41:16,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:41:16,967 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:16,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 31 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:41:16,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-24 03:41:16,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-02-24 03:41:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-02-24 03:41:16,971 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2022-02-24 03:41:16,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:16,971 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-02-24 03:41:16,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:16,972 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-02-24 03:41:16,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 03:41:16,972 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:16,972 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:16,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 03:41:16,973 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:16,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:16,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1251247646, now seen corresponding path program 3 times [2022-02-24 03:41:16,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:16,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918680889] [2022-02-24 03:41:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:16,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:17,176 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:17,177 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:17,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:17,275 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:17,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918680889] [2022-02-24 03:41:17,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1918680889] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:17,276 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:17,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 03:41:17,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659303740] [2022-02-24 03:41:17,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:17,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:41:17,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:17,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:41:17,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:41:17,277 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:17,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:17,359 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-02-24 03:41:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 03:41:17,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 03:41:17,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:17,360 INFO L225 Difference]: With dead ends: 26 [2022-02-24 03:41:17,360 INFO L226 Difference]: Without dead ends: 19 [2022-02-24 03:41:17,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:41:17,361 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:17,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:41:17,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-02-24 03:41:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-02-24 03:41:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:17,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-02-24 03:41:17,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2022-02-24 03:41:17,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:17,366 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-02-24 03:41:17,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-02-24 03:41:17,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 03:41:17,367 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:17,367 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:17,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 03:41:17,367 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:17,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:17,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1928597327, now seen corresponding path program 4 times [2022-02-24 03:41:17,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:17,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380580837] [2022-02-24 03:41:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:17,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:17,558 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:17,558 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:17,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:17,676 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:17,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380580837] [2022-02-24 03:41:17,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1380580837] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:17,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:17,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:41:17,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998541280] [2022-02-24 03:41:17,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:17,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:41:17,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:17,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:41:17,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:41:17,678 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:17,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:17,786 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2022-02-24 03:41:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:41:17,787 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-24 03:41:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:17,787 INFO L225 Difference]: With dead ends: 27 [2022-02-24 03:41:17,787 INFO L226 Difference]: Without dead ends: 20 [2022-02-24 03:41:17,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:41:17,788 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:17,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 41 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:17,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-24 03:41:17,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-24 03:41:17,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-02-24 03:41:17,793 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2022-02-24 03:41:17,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:17,793 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-02-24 03:41:17,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:17,793 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-02-24 03:41:17,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 03:41:17,794 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:17,794 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:17,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 03:41:17,794 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:17,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:17,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1719543682, now seen corresponding path program 5 times [2022-02-24 03:41:17,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:17,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716845923] [2022-02-24 03:41:17,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:17,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:17,990 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:17,991 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:18,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:18,118 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:18,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716845923] [2022-02-24 03:41:18,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [716845923] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:18,118 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:18,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:41:18,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344790285] [2022-02-24 03:41:18,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:18,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:41:18,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:18,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:41:18,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:41:18,120 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:18,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:18,243 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-02-24 03:41:18,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:41:18,244 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-24 03:41:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:18,245 INFO L225 Difference]: With dead ends: 28 [2022-02-24 03:41:18,246 INFO L226 Difference]: Without dead ends: 21 [2022-02-24 03:41:18,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:41:18,249 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:18,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 46 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-24 03:41:18,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-02-24 03:41:18,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:18,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-02-24 03:41:18,255 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2022-02-24 03:41:18,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:18,255 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-02-24 03:41:18,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:18,255 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-02-24 03:41:18,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 03:41:18,256 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:18,256 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:18,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 03:41:18,256 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:18,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:18,257 INFO L85 PathProgramCache]: Analyzing trace with hash 466152017, now seen corresponding path program 6 times [2022-02-24 03:41:18,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:18,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782879822] [2022-02-24 03:41:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:18,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:18,439 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:18,439 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:18,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:18,610 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:18,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782879822] [2022-02-24 03:41:18,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [782879822] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:18,611 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:18,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 03:41:18,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557288544] [2022-02-24 03:41:18,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:18,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 03:41:18,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:18,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 03:41:18,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:41:18,612 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:18,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:18,762 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2022-02-24 03:41:18,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 03:41:18,762 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 03:41:18,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:18,763 INFO L225 Difference]: With dead ends: 29 [2022-02-24 03:41:18,763 INFO L226 Difference]: Without dead ends: 22 [2022-02-24 03:41:18,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:41:18,764 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:18,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:18,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-24 03:41:18,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-02-24 03:41:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:18,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-02-24 03:41:18,767 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2022-02-24 03:41:18,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:18,767 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-02-24 03:41:18,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:18,767 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-02-24 03:41:18,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-24 03:41:18,768 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:18,768 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:18,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 03:41:18,768 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:18,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:18,768 INFO L85 PathProgramCache]: Analyzing trace with hash -496758050, now seen corresponding path program 7 times [2022-02-24 03:41:18,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:18,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544905427] [2022-02-24 03:41:18,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:18,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:18,946 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:18,946 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:19,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:19,118 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:19,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544905427] [2022-02-24 03:41:19,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [544905427] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:19,118 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:19,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 03:41:19,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527921187] [2022-02-24 03:41:19,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:19,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 03:41:19,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:19,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 03:41:19,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:41:19,120 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:19,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:19,288 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-02-24 03:41:19,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 03:41:19,289 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-02-24 03:41:19,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:19,289 INFO L225 Difference]: With dead ends: 30 [2022-02-24 03:41:19,289 INFO L226 Difference]: Without dead ends: 23 [2022-02-24 03:41:19,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:41:19,290 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:19,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:19,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-24 03:41:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-02-24 03:41:19,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:19,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-02-24 03:41:19,295 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2022-02-24 03:41:19,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:19,295 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-02-24 03:41:19,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:19,295 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-02-24 03:41:19,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 03:41:19,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:19,296 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:19,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 03:41:19,296 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:19,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:19,297 INFO L85 PathProgramCache]: Analyzing trace with hash -282199055, now seen corresponding path program 8 times [2022-02-24 03:41:19,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:19,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541794863] [2022-02-24 03:41:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:19,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:19,470 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:19,470 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:19,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:19,613 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:19,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541794863] [2022-02-24 03:41:19,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1541794863] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:19,613 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:19,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 03:41:19,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910659717] [2022-02-24 03:41:19,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:19,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 03:41:19,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:19,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 03:41:19,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:41:19,615 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:19,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:19,829 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2022-02-24 03:41:19,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 03:41:19,830 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-24 03:41:19,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:19,830 INFO L225 Difference]: With dead ends: 31 [2022-02-24 03:41:19,830 INFO L226 Difference]: Without dead ends: 24 [2022-02-24 03:41:19,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:41:19,831 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:19,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 60 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-24 03:41:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-24 03:41:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-02-24 03:41:19,836 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2022-02-24 03:41:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:19,836 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-02-24 03:41:19,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-02-24 03:41:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 03:41:19,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:19,837 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:19,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 03:41:19,837 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:19,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2074162494, now seen corresponding path program 9 times [2022-02-24 03:41:19,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:19,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228967351] [2022-02-24 03:41:19,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:19,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:20,015 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:20,015 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:20,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:20,165 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:20,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228967351] [2022-02-24 03:41:20,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1228967351] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:20,167 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:20,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 03:41:20,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9638673] [2022-02-24 03:41:20,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:20,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 03:41:20,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:20,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 03:41:20,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:41:20,168 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:20,379 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-02-24 03:41:20,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 03:41:20,379 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-24 03:41:20,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:20,380 INFO L225 Difference]: With dead ends: 32 [2022-02-24 03:41:20,380 INFO L226 Difference]: Without dead ends: 25 [2022-02-24 03:41:20,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:41:20,381 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:20,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 66 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-24 03:41:20,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-02-24 03:41:20,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-02-24 03:41:20,386 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2022-02-24 03:41:20,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:20,386 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-02-24 03:41:20,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:20,386 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-02-24 03:41:20,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 03:41:20,387 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:20,387 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:20,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 03:41:20,387 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:20,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:20,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2106926481, now seen corresponding path program 10 times [2022-02-24 03:41:20,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:20,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089502461] [2022-02-24 03:41:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:20,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:20,559 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:20,560 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:20,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:20,739 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:20,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089502461] [2022-02-24 03:41:20,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1089502461] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:20,740 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:20,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 03:41:20,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723877471] [2022-02-24 03:41:20,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:20,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 03:41:20,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:20,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 03:41:20,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:41:20,741 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:21,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:21,002 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2022-02-24 03:41:21,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 03:41:21,002 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 03:41:21,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:21,003 INFO L225 Difference]: With dead ends: 33 [2022-02-24 03:41:21,003 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 03:41:21,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-24 03:41:21,004 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:21,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:21,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 03:41:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-24 03:41:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:21,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2022-02-24 03:41:21,008 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2022-02-24 03:41:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:21,008 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2022-02-24 03:41:21,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:21,008 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2022-02-24 03:41:21,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 03:41:21,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:21,009 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:21,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 03:41:21,009 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:21,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:21,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1172357218, now seen corresponding path program 11 times [2022-02-24 03:41:21,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:21,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481787917] [2022-02-24 03:41:21,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:21,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:21,193 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:21,193 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:21,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:21,376 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:21,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481787917] [2022-02-24 03:41:21,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [481787917] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:21,376 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:21,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 03:41:21,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490678802] [2022-02-24 03:41:21,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:21,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 03:41:21,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:21,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 03:41:21,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:41:21,378 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:21,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:21,682 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-02-24 03:41:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 03:41:21,683 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 03:41:21,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:21,684 INFO L225 Difference]: With dead ends: 34 [2022-02-24 03:41:21,684 INFO L226 Difference]: Without dead ends: 27 [2022-02-24 03:41:21,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:41:21,685 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:21,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 75 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:21,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-24 03:41:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-24 03:41:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-02-24 03:41:21,689 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2022-02-24 03:41:21,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:21,689 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-02-24 03:41:21,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:21,689 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-02-24 03:41:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 03:41:21,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:21,690 INFO L514 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:21,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 03:41:21,690 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:21,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:21,691 INFO L85 PathProgramCache]: Analyzing trace with hash 249063217, now seen corresponding path program 12 times [2022-02-24 03:41:21,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:21,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339726912] [2022-02-24 03:41:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:21,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:21,862 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:21,862 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:22,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:22,043 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:22,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339726912] [2022-02-24 03:41:22,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [339726912] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:22,043 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:22,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 03:41:22,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209403825] [2022-02-24 03:41:22,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:22,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 03:41:22,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:22,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 03:41:22,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-02-24 03:41:22,045 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:22,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:22,330 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-02-24 03:41:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 03:41:22,330 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 03:41:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:22,331 INFO L225 Difference]: With dead ends: 35 [2022-02-24 03:41:22,331 INFO L226 Difference]: Without dead ends: 28 [2022-02-24 03:41:22,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-02-24 03:41:22,332 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:22,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 81 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:22,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-24 03:41:22,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-02-24 03:41:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-02-24 03:41:22,336 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2022-02-24 03:41:22,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:22,337 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-02-24 03:41:22,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-02-24 03:41:22,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 03:41:22,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:22,337 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:22,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 03:41:22,338 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:22,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:22,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1363423742, now seen corresponding path program 13 times [2022-02-24 03:41:22,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:22,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202595632] [2022-02-24 03:41:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:22,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:22,514 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:22,514 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:22,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:22,757 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:22,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202595632] [2022-02-24 03:41:22,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1202595632] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:22,757 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:22,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 03:41:22,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731591975] [2022-02-24 03:41:22,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:22,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 03:41:22,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:22,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 03:41:22,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:41:22,759 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:23,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:23,079 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-02-24 03:41:23,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 03:41:23,079 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-24 03:41:23,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:23,080 INFO L225 Difference]: With dead ends: 36 [2022-02-24 03:41:23,080 INFO L226 Difference]: Without dead ends: 29 [2022-02-24 03:41:23,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-02-24 03:41:23,081 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:23,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 86 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-24 03:41:23,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-24 03:41:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:23,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-02-24 03:41:23,093 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2022-02-24 03:41:23,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:23,094 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-02-24 03:41:23,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:23,094 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-02-24 03:41:23,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 03:41:23,096 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:23,096 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:23,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 03:41:23,097 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:23,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:23,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1548861649, now seen corresponding path program 14 times [2022-02-24 03:41:23,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:23,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87650135] [2022-02-24 03:41:23,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:23,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:23,276 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:23,277 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:23,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:23,486 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:23,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87650135] [2022-02-24 03:41:23,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [87650135] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:23,487 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:23,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 03:41:23,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740014482] [2022-02-24 03:41:23,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:23,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 03:41:23,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:23,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 03:41:23,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:41:23,488 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:23,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:23,842 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2022-02-24 03:41:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 03:41:23,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 03:41:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:23,843 INFO L225 Difference]: With dead ends: 37 [2022-02-24 03:41:23,843 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 03:41:23,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 03:41:23,844 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:23,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 91 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:41:23,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 03:41:23,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-24 03:41:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:23,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-02-24 03:41:23,849 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2022-02-24 03:41:23,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:23,849 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-02-24 03:41:23,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:23,850 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-02-24 03:41:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 03:41:23,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:23,850 INFO L514 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:23,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 03:41:23,850 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:23,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:23,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1292497826, now seen corresponding path program 15 times [2022-02-24 03:41:23,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:23,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928429504] [2022-02-24 03:41:23,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:23,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:24,003 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:24,004 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:24,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:24,251 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:24,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928429504] [2022-02-24 03:41:24,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [928429504] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:24,251 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:24,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 03:41:24,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810506294] [2022-02-24 03:41:24,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:24,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 03:41:24,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:24,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 03:41:24,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:41:24,253 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:24,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:24,651 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-02-24 03:41:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 03:41:24,652 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-24 03:41:24,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:24,652 INFO L225 Difference]: With dead ends: 38 [2022-02-24 03:41:24,652 INFO L226 Difference]: Without dead ends: 31 [2022-02-24 03:41:24,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 03:41:24,654 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:24,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 95 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:41:24,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-24 03:41:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-02-24 03:41:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-02-24 03:41:24,658 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2022-02-24 03:41:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:24,658 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-02-24 03:41:24,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-02-24 03:41:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 03:41:24,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:24,658 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:24,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 03:41:24,659 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash 819671665, now seen corresponding path program 16 times [2022-02-24 03:41:24,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:24,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472338037] [2022-02-24 03:41:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:24,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:24,817 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:24,818 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:25,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:25,063 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:25,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472338037] [2022-02-24 03:41:25,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1472338037] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:25,063 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:25,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 03:41:25,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638963780] [2022-02-24 03:41:25,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:25,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 03:41:25,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:25,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 03:41:25,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:41:25,064 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:25,494 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-02-24 03:41:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 03:41:25,495 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 03:41:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:25,495 INFO L225 Difference]: With dead ends: 39 [2022-02-24 03:41:25,495 INFO L226 Difference]: Without dead ends: 32 [2022-02-24 03:41:25,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 03:41:25,497 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:25,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 101 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:41:25,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-24 03:41:25,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-24 03:41:25,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:25,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-02-24 03:41:25,501 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2022-02-24 03:41:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:25,501 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-02-24 03:41:25,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:25,501 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-02-24 03:41:25,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 03:41:25,502 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:25,502 INFO L514 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:25,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 03:41:25,502 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:25,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:25,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1872416446, now seen corresponding path program 17 times [2022-02-24 03:41:25,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:25,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418594315] [2022-02-24 03:41:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:25,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:25,653 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:25,653 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:25,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:25,936 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:25,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418594315] [2022-02-24 03:41:25,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [418594315] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:25,936 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:25,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 03:41:25,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438291399] [2022-02-24 03:41:25,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:25,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 03:41:25,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:25,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 03:41:25,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:41:25,937 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:26,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:26,397 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-02-24 03:41:26,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 03:41:26,397 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 03:41:26,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:26,398 INFO L225 Difference]: With dead ends: 40 [2022-02-24 03:41:26,398 INFO L226 Difference]: Without dead ends: 33 [2022-02-24 03:41:26,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 03:41:26,399 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:26,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 106 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:41:26,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-24 03:41:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-24 03:41:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:26,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-02-24 03:41:26,403 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2022-02-24 03:41:26,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:26,404 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-02-24 03:41:26,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-02-24 03:41:26,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 03:41:26,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:26,404 INFO L514 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:26,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 03:41:26,405 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:26,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:26,405 INFO L85 PathProgramCache]: Analyzing trace with hash 147766289, now seen corresponding path program 18 times [2022-02-24 03:41:26,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:26,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708057058] [2022-02-24 03:41:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:26,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:26,582 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:26,582 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:26,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:26,882 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:26,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708057058] [2022-02-24 03:41:26,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1708057058] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:26,882 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:26,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 03:41:26,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736914588] [2022-02-24 03:41:26,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:26,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 03:41:26,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:26,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 03:41:26,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:41:26,883 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:27,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:27,521 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2022-02-24 03:41:27,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 03:41:27,524 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 03:41:27,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:27,524 INFO L225 Difference]: With dead ends: 41 [2022-02-24 03:41:27,525 INFO L226 Difference]: Without dead ends: 34 [2022-02-24 03:41:27,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=153, Invalid=1487, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 03:41:27,526 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:27,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 110 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:41:27,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-24 03:41:27,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-02-24 03:41:27,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-02-24 03:41:27,532 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2022-02-24 03:41:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:27,532 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-02-24 03:41:27,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-02-24 03:41:27,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 03:41:27,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:27,533 INFO L514 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:27,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 03:41:27,533 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:27,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:27,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1776781026, now seen corresponding path program 19 times [2022-02-24 03:41:27,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:27,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532515987] [2022-02-24 03:41:27,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:27,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:27,703 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:27,703 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:28,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:28,026 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:28,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532515987] [2022-02-24 03:41:28,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1532515987] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:28,026 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:28,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 03:41:28,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570104225] [2022-02-24 03:41:28,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:28,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 03:41:28,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:28,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 03:41:28,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:41:28,028 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:28,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:28,523 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-02-24 03:41:28,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 03:41:28,523 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 03:41:28,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:28,524 INFO L225 Difference]: With dead ends: 42 [2022-02-24 03:41:28,524 INFO L226 Difference]: Without dead ends: 35 [2022-02-24 03:41:28,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 03:41:28,525 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:28,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 116 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:41:28,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-24 03:41:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-24 03:41:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:28,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-02-24 03:41:28,530 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2022-02-24 03:41:28,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:28,530 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-02-24 03:41:28,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:28,530 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-02-24 03:41:28,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 03:41:28,531 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:28,531 INFO L514 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:28,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 03:41:28,531 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:28,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1308205647, now seen corresponding path program 20 times [2022-02-24 03:41:28,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:28,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288781965] [2022-02-24 03:41:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:28,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:28,684 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:28,684 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:29,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:29,027 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:29,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288781965] [2022-02-24 03:41:29,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1288781965] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:29,028 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:29,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 03:41:29,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360455180] [2022-02-24 03:41:29,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:29,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 03:41:29,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 03:41:29,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-02-24 03:41:29,029 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:29,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:29,591 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2022-02-24 03:41:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 03:41:29,593 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 03:41:29,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:29,593 INFO L225 Difference]: With dead ends: 43 [2022-02-24 03:41:29,593 INFO L226 Difference]: Without dead ends: 36 [2022-02-24 03:41:29,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 03:41:29,594 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:29,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 121 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:41:29,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-24 03:41:29,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-24 03:41:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:29,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2022-02-24 03:41:29,599 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2022-02-24 03:41:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:29,599 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2022-02-24 03:41:29,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2022-02-24 03:41:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 03:41:29,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:29,600 INFO L514 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:29,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 03:41:29,600 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:29,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:29,601 INFO L85 PathProgramCache]: Analyzing trace with hash 332729214, now seen corresponding path program 21 times [2022-02-24 03:41:29,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:29,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700440843] [2022-02-24 03:41:29,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:29,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:29,784 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:29,784 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:30,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:30,160 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:30,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700440843] [2022-02-24 03:41:30,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [700440843] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:30,161 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:30,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 03:41:30,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158358709] [2022-02-24 03:41:30,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:30,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 03:41:30,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:30,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 03:41:30,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-02-24 03:41:30,162 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:30,692 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-02-24 03:41:30,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 03:41:30,692 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-24 03:41:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:30,692 INFO L225 Difference]: With dead ends: 44 [2022-02-24 03:41:30,693 INFO L226 Difference]: Without dead ends: 37 [2022-02-24 03:41:30,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 03:41:30,694 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:30,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 126 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:41:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-24 03:41:30,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-02-24 03:41:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 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) [2022-02-24 03:41:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-02-24 03:41:30,698 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2022-02-24 03:41:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:30,698 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-02-24 03:41:30,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:30,699 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-02-24 03:41:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 03:41:30,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:30,699 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:30,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 03:41:30,699 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:30,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:30,700 INFO L85 PathProgramCache]: Analyzing trace with hash -337897647, now seen corresponding path program 22 times [2022-02-24 03:41:30,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:30,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607696947] [2022-02-24 03:41:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:30,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:30,860 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:30,860 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:31,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:31,213 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:31,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607696947] [2022-02-24 03:41:31,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1607696947] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:31,213 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:31,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 03:41:31,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438406940] [2022-02-24 03:41:31,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:31,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 03:41:31,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:31,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 03:41:31,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:41:31,215 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:31,809 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2022-02-24 03:41:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 03:41:31,810 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 03:41:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:31,810 INFO L225 Difference]: With dead ends: 45 [2022-02-24 03:41:31,810 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 03:41:31,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 03:41:31,811 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:31,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 131 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:41:31,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 03:41:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-02-24 03:41:31,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 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) [2022-02-24 03:41:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-02-24 03:41:31,815 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2022-02-24 03:41:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:31,815 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-02-24 03:41:31,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-02-24 03:41:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 03:41:31,816 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:31,816 INFO L514 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:31,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 03:41:31,816 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:31,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:31,816 INFO L85 PathProgramCache]: Analyzing trace with hash 347506142, now seen corresponding path program 23 times [2022-02-24 03:41:31,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:31,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513031578] [2022-02-24 03:41:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:31,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:31,962 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:31,962 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:32,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:32,341 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:32,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513031578] [2022-02-24 03:41:32,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [513031578] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:32,341 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:32,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 03:41:32,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696972133] [2022-02-24 03:41:32,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:32,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 03:41:32,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:32,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 03:41:32,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:41:32,343 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:33,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:33,126 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-02-24 03:41:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 03:41:33,127 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-24 03:41:33,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:33,127 INFO L225 Difference]: With dead ends: 46 [2022-02-24 03:41:33,127 INFO L226 Difference]: Without dead ends: 39 [2022-02-24 03:41:33,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=2357, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 03:41:33,129 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:33,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 135 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:41:33,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-24 03:41:33,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-02-24 03:41:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:33,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-02-24 03:41:33,133 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2022-02-24 03:41:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:33,133 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-02-24 03:41:33,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-02-24 03:41:33,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 03:41:33,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:33,134 INFO L514 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:33,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 03:41:33,134 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:33,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:33,134 INFO L85 PathProgramCache]: Analyzing trace with hash 120187121, now seen corresponding path program 24 times [2022-02-24 03:41:33,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:33,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615245716] [2022-02-24 03:41:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:33,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:33,279 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:33,280 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:33,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:33,693 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:33,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615245716] [2022-02-24 03:41:33,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1615245716] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:33,693 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:33,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 03:41:33,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651546851] [2022-02-24 03:41:33,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:33,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 03:41:33,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:33,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 03:41:33,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2022-02-24 03:41:33,695 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:34,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:34,354 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2022-02-24 03:41:34,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 03:41:34,355 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 03:41:34,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:34,355 INFO L225 Difference]: With dead ends: 47 [2022-02-24 03:41:34,355 INFO L226 Difference]: Without dead ends: 40 [2022-02-24 03:41:34,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 03:41:34,356 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:34,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 141 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:41:34,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-24 03:41:34,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-24 03:41:34,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 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) [2022-02-24 03:41:34,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-02-24 03:41:34,361 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2022-02-24 03:41:34,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:34,361 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-02-24 03:41:34,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:34,361 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-02-24 03:41:34,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 03:41:34,362 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:34,362 INFO L514 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:34,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 03:41:34,362 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:34,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:34,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1663232062, now seen corresponding path program 25 times [2022-02-24 03:41:34,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:34,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535819462] [2022-02-24 03:41:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:34,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:34,525 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:34,526 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:34,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:34,959 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:34,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535819462] [2022-02-24 03:41:34,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [535819462] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:34,960 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:34,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 03:41:34,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619009316] [2022-02-24 03:41:34,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:34,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 03:41:34,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:34,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 03:41:34,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2022-02-24 03:41:34,961 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:35,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:35,724 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-02-24 03:41:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 03:41:35,724 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-24 03:41:35,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:35,725 INFO L225 Difference]: With dead ends: 48 [2022-02-24 03:41:35,725 INFO L226 Difference]: Without dead ends: 41 [2022-02-24 03:41:35,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 03:41:35,726 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:35,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 146 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:41:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-24 03:41:35,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-02-24 03:41:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-02-24 03:41:35,731 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2022-02-24 03:41:35,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:35,731 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-02-24 03:41:35,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:35,731 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-02-24 03:41:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 03:41:35,731 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:35,731 INFO L514 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:35,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 03:41:35,732 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:35,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:35,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2041982319, now seen corresponding path program 26 times [2022-02-24 03:41:35,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:35,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331890] [2022-02-24 03:41:35,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:35,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:35,891 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:35,891 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:36,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:36,330 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:36,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331890] [2022-02-24 03:41:36,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1331890] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:36,330 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:36,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 03:41:36,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089214816] [2022-02-24 03:41:36,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:36,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 03:41:36,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:36,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 03:41:36,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:41:36,331 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:37,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:37,054 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2022-02-24 03:41:37,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 03:41:37,055 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 03:41:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:37,056 INFO L225 Difference]: With dead ends: 49 [2022-02-24 03:41:37,056 INFO L226 Difference]: Without dead ends: 42 [2022-02-24 03:41:37,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 03:41:37,057 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:37,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 151 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:41:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-24 03:41:37,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-02-24 03:41:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 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) [2022-02-24 03:41:37,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2022-02-24 03:41:37,062 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2022-02-24 03:41:37,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:37,062 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2022-02-24 03:41:37,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:37,062 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2022-02-24 03:41:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 03:41:37,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:37,062 INFO L514 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:37,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 03:41:37,063 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:37,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:37,063 INFO L85 PathProgramCache]: Analyzing trace with hash -939511138, now seen corresponding path program 27 times [2022-02-24 03:41:37,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:37,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597028186] [2022-02-24 03:41:37,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:37,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:37,216 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:37,217 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:37,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:37,710 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:37,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597028186] [2022-02-24 03:41:37,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [597028186] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:37,710 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:37,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 03:41:37,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477197885] [2022-02-24 03:41:37,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:37,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 03:41:37,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:37,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 03:41:37,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2022-02-24 03:41:37,711 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:38,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:38,773 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-02-24 03:41:38,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 03:41:38,774 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-24 03:41:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:38,774 INFO L225 Difference]: With dead ends: 50 [2022-02-24 03:41:38,774 INFO L226 Difference]: Without dead ends: 43 [2022-02-24 03:41:38,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=225, Invalid=3197, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 03:41:38,776 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:38,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:41:38,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-24 03:41:38,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-02-24 03:41:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:38,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-02-24 03:41:38,781 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2022-02-24 03:41:38,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:38,781 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-02-24 03:41:38,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-02-24 03:41:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 03:41:38,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:38,782 INFO L514 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:38,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 03:41:38,782 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:38,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:38,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1122642895, now seen corresponding path program 28 times [2022-02-24 03:41:38,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:38,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392382652] [2022-02-24 03:41:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:38,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:38,932 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:38,932 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:39,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:39,405 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:39,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392382652] [2022-02-24 03:41:39,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1392382652] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:39,405 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:39,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 03:41:39,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114350578] [2022-02-24 03:41:39,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:39,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 03:41:39,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:39,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 03:41:39,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2022-02-24 03:41:39,406 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:40,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:40,304 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2022-02-24 03:41:40,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 03:41:40,304 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 03:41:40,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:40,305 INFO L225 Difference]: With dead ends: 51 [2022-02-24 03:41:40,305 INFO L226 Difference]: Without dead ends: 44 [2022-02-24 03:41:40,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 03:41:40,306 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:40,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 161 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:41:40,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-24 03:41:40,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-02-24 03:41:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 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) [2022-02-24 03:41:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2022-02-24 03:41:40,310 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2022-02-24 03:41:40,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:40,311 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2022-02-24 03:41:40,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:40,311 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2022-02-24 03:41:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 03:41:40,311 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:40,311 INFO L514 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:40,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 03:41:40,312 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:40,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1790207230, now seen corresponding path program 29 times [2022-02-24 03:41:40,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:40,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549421572] [2022-02-24 03:41:40,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:40,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:40,467 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:40,467 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:41,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:41,005 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:41,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549421572] [2022-02-24 03:41:41,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [549421572] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:41,005 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:41,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 03:41:41,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928875899] [2022-02-24 03:41:41,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:41,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 03:41:41,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:41,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 03:41:41,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 03:41:41,007 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:41,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:41,912 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-02-24 03:41:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 03:41:41,912 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-02-24 03:41:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:41,913 INFO L225 Difference]: With dead ends: 52 [2022-02-24 03:41:41,913 INFO L226 Difference]: Without dead ends: 45 [2022-02-24 03:41:41,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 03:41:41,914 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:41,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 166 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:41:41,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-24 03:41:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-02-24 03:41:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-02-24 03:41:41,919 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2022-02-24 03:41:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:41,919 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-02-24 03:41:41,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-02-24 03:41:41,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 03:41:41,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:41,920 INFO L514 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:41,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 03:41:41,920 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:41,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1894247889, now seen corresponding path program 30 times [2022-02-24 03:41:41,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:41,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605001173] [2022-02-24 03:41:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:41,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:42,140 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:42,141 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:42,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:42,759 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:42,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605001173] [2022-02-24 03:41:42,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [605001173] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:42,759 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:42,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 03:41:42,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103148563] [2022-02-24 03:41:42,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:42,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 03:41:42,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:42,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 03:41:42,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 03:41:42,760 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:43,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:43,683 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2022-02-24 03:41:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 03:41:43,683 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 03:41:43,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:43,684 INFO L225 Difference]: With dead ends: 53 [2022-02-24 03:41:43,684 INFO L226 Difference]: Without dead ends: 46 [2022-02-24 03:41:43,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 03:41:43,686 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:43,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 171 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:41:43,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-24 03:41:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-02-24 03:41:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 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) [2022-02-24 03:41:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2022-02-24 03:41:43,690 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2022-02-24 03:41:43,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:43,690 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2022-02-24 03:41:43,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:43,690 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2022-02-24 03:41:43,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 03:41:43,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:43,691 INFO L514 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:43,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 03:41:43,691 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:43,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:43,691 INFO L85 PathProgramCache]: Analyzing trace with hash 824541022, now seen corresponding path program 31 times [2022-02-24 03:41:43,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:43,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574115891] [2022-02-24 03:41:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:43,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:43,839 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:43,840 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:44,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:44,425 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:44,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574115891] [2022-02-24 03:41:44,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [574115891] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:44,425 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:44,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 03:41:44,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367358729] [2022-02-24 03:41:44,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:44,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 03:41:44,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:44,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 03:41:44,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 03:41:44,426 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:45,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:45,878 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-02-24 03:41:45,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 03:41:45,879 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-02-24 03:41:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:45,879 INFO L225 Difference]: With dead ends: 54 [2022-02-24 03:41:45,879 INFO L226 Difference]: Without dead ends: 47 [2022-02-24 03:41:45,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=257, Invalid=4165, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 03:41:45,880 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:45,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 175 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:41:45,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-24 03:41:45,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-02-24 03:41:45,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:45,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-02-24 03:41:45,884 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2022-02-24 03:41:45,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:45,885 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-02-24 03:41:45,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:45,885 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-02-24 03:41:45,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 03:41:45,885 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:45,885 INFO L514 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:45,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 03:41:45,886 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:45,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:45,886 INFO L85 PathProgramCache]: Analyzing trace with hash 2023366513, now seen corresponding path program 32 times [2022-02-24 03:41:45,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:45,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383392582] [2022-02-24 03:41:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:45,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:46,042 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:46,042 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:46,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:46,717 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:46,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383392582] [2022-02-24 03:41:46,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1383392582] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:46,717 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:46,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 03:41:46,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176744323] [2022-02-24 03:41:46,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:46,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 03:41:46,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:46,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 03:41:46,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:41:46,718 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:48,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:48,470 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2022-02-24 03:41:48,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 03:41:48,470 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 03:41:48,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:48,470 INFO L225 Difference]: With dead ends: 55 [2022-02-24 03:41:48,470 INFO L226 Difference]: Without dead ends: 48 [2022-02-24 03:41:48,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=265, Invalid=4427, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 03:41:48,472 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:48,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 180 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:41:48,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-24 03:41:48,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-24 03:41:48,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-02-24 03:41:48,475 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2022-02-24 03:41:48,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:48,476 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-02-24 03:41:48,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-02-24 03:41:48,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 03:41:48,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:48,476 INFO L514 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:48,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 03:41:48,477 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:48,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:48,477 INFO L85 PathProgramCache]: Analyzing trace with hash 532251070, now seen corresponding path program 33 times [2022-02-24 03:41:48,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:48,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969444849] [2022-02-24 03:41:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:48,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:48,632 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:48,632 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:49,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:49,316 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:49,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969444849] [2022-02-24 03:41:49,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1969444849] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:49,317 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:49,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 03:41:49,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87139618] [2022-02-24 03:41:49,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:49,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 03:41:49,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:49,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 03:41:49,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 03:41:49,318 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:50,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:50,462 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-02-24 03:41:50,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 03:41:50,463 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-24 03:41:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:50,463 INFO L225 Difference]: With dead ends: 56 [2022-02-24 03:41:50,463 INFO L226 Difference]: Without dead ends: 49 [2022-02-24 03:41:50,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=207, Invalid=4763, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 03:41:50,465 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:50,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 186 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:41:50,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-24 03:41:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-02-24 03:41:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-02-24 03:41:50,468 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2022-02-24 03:41:50,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:50,468 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-02-24 03:41:50,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:50,468 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-02-24 03:41:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 03:41:50,469 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:50,469 INFO L514 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:50,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 03:41:50,469 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:50,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:50,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1552312593, now seen corresponding path program 34 times [2022-02-24 03:41:50,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:50,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364807245] [2022-02-24 03:41:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:50,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:50,619 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:50,620 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:51,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:51,362 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:51,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364807245] [2022-02-24 03:41:51,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [364807245] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:51,362 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:51,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-24 03:41:51,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301134976] [2022-02-24 03:41:51,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:51,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 03:41:51,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:51,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 03:41:51,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:41:51,363 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:53,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:53,460 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2022-02-24 03:41:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 03:41:53,460 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 03:41:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:53,461 INFO L225 Difference]: With dead ends: 57 [2022-02-24 03:41:53,461 INFO L226 Difference]: Without dead ends: 50 [2022-02-24 03:41:53,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=281, Invalid=4975, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 03:41:53,462 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:53,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 190 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:41:53,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-24 03:41:53,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-24 03:41:53,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:53,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2022-02-24 03:41:53,466 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2022-02-24 03:41:53,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:53,466 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2022-02-24 03:41:53,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:53,466 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2022-02-24 03:41:53,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 03:41:53,466 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:53,467 INFO L514 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:53,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 03:41:53,467 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:53,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:53,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1185518562, now seen corresponding path program 35 times [2022-02-24 03:41:53,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:53,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644375041] [2022-02-24 03:41:53,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:53,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:53,621 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:53,621 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:54,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:54,347 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:54,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644375041] [2022-02-24 03:41:54,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [644375041] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:54,348 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:54,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-24 03:41:54,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781396826] [2022-02-24 03:41:54,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:54,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-24 03:41:54,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:54,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-24 03:41:54,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 03:41:54,349 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:56,771 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-02-24 03:41:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 03:41:56,771 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-02-24 03:41:56,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:56,772 INFO L225 Difference]: With dead ends: 58 [2022-02-24 03:41:56,772 INFO L226 Difference]: Without dead ends: 51 [2022-02-24 03:41:56,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=289, Invalid=5261, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 03:41:56,773 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:56,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 195 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:41:56,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-24 03:41:56,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-02-24 03:41:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-02-24 03:41:56,777 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2022-02-24 03:41:56,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:56,777 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-02-24 03:41:56,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:56,777 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-02-24 03:41:56,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 03:41:56,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:56,777 INFO L514 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:56,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 03:41:56,778 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:56,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:56,778 INFO L85 PathProgramCache]: Analyzing trace with hash -158938447, now seen corresponding path program 36 times [2022-02-24 03:41:56,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:56,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086545785] [2022-02-24 03:41:56,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:56,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:56,939 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:41:56,939 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:41:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:57,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:57,751 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:57,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086545785] [2022-02-24 03:41:57,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086545785] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:57,751 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:57,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-24 03:41:57,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704571837] [2022-02-24 03:41:57,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:57,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-24 03:41:57,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:57,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-24 03:41:57,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 03:41:57,753 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:00,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:00,555 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-02-24 03:42:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 03:42:00,556 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 03:42:00,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:00,556 INFO L225 Difference]: With dead ends: 59 [2022-02-24 03:42:00,556 INFO L226 Difference]: Without dead ends: 52 [2022-02-24 03:42:00,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=297, Invalid=5555, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 03:42:00,558 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:00,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 200 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:42:00,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-24 03:42:00,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-02-24 03:42:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2022-02-24 03:42:00,561 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2022-02-24 03:42:00,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:00,562 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2022-02-24 03:42:00,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:00,562 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2022-02-24 03:42:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 03:42:00,562 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:00,562 INFO L514 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:00,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 03:42:00,562 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:00,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:00,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1600274046, now seen corresponding path program 37 times [2022-02-24 03:42:00,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:00,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548424800] [2022-02-24 03:42:00,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:00,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:00,720 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:42:00,721 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:01,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:01,598 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:01,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548424800] [2022-02-24 03:42:01,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [548424800] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:01,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:01,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-24 03:42:01,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209635692] [2022-02-24 03:42:01,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:01,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-24 03:42:01,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:01,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-24 03:42:01,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 03:42:01,599 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:04,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:04,662 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-02-24 03:42:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 03:42:04,663 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-24 03:42:04,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:04,663 INFO L225 Difference]: With dead ends: 60 [2022-02-24 03:42:04,663 INFO L226 Difference]: Without dead ends: 53 [2022-02-24 03:42:04,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=305, Invalid=5857, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 03:42:04,665 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:04,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 205 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:42:04,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-24 03:42:04,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-02-24 03:42:04,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-02-24 03:42:04,669 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2022-02-24 03:42:04,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:04,669 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-02-24 03:42:04,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:04,669 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-02-24 03:42:04,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 03:42:04,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:04,670 INFO L514 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:04,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 03:42:04,670 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:04,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:04,670 INFO L85 PathProgramCache]: Analyzing trace with hash 301286481, now seen corresponding path program 38 times [2022-02-24 03:42:04,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:04,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449760077] [2022-02-24 03:42:04,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:04,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:04,829 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:42:04,829 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:05,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:05,679 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:05,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449760077] [2022-02-24 03:42:05,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1449760077] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:05,679 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:05,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-24 03:42:05,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600531637] [2022-02-24 03:42:05,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:05,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-24 03:42:05,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-24 03:42:05,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 03:42:05,681 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 41 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:07,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:07,114 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2022-02-24 03:42:07,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 03:42:07,114 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 41 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 03:42:07,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:07,116 INFO L225 Difference]: With dead ends: 61 [2022-02-24 03:42:07,116 INFO L226 Difference]: Without dead ends: 54 [2022-02-24 03:42:07,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 03:42:07,120 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 1873 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:07,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 211 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1873 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:42:07,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-24 03:42:07,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-02-24 03:42:07,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:07,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-02-24 03:42:07,125 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2022-02-24 03:42:07,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:07,125 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-02-24 03:42:07,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 41 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-02-24 03:42:07,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 03:42:07,126 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:07,126 INFO L514 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:07,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 03:42:07,126 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:07,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:07,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1312622370, now seen corresponding path program 39 times [2022-02-24 03:42:07,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:07,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101124540] [2022-02-24 03:42:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:07,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:07,286 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:42:07,286 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:08,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:08,222 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:08,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101124540] [2022-02-24 03:42:08,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [101124540] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:08,223 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:08,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-24 03:42:08,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353765407] [2022-02-24 03:42:08,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:08,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-24 03:42:08,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:08,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-24 03:42:08,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 03:42:08,226 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:09,611 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-02-24 03:42:09,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 03:42:09,612 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-24 03:42:09,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:09,612 INFO L225 Difference]: With dead ends: 62 [2022-02-24 03:42:09,612 INFO L226 Difference]: Without dead ends: 55 [2022-02-24 03:42:09,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=243, Invalid=6563, Unknown=0, NotChecked=0, Total=6806 [2022-02-24 03:42:09,613 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:09,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 216 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:42:09,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-24 03:42:09,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-24 03:42:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-02-24 03:42:09,616 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2022-02-24 03:42:09,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:09,616 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-02-24 03:42:09,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-02-24 03:42:09,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 03:42:09,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:09,616 INFO L514 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:09,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 03:42:09,617 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:09,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:09,617 INFO L85 PathProgramCache]: Analyzing trace with hash 195810801, now seen corresponding path program 40 times [2022-02-24 03:42:09,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:09,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401020989] [2022-02-24 03:42:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:09,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:09,777 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:42:09,777 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:10,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:10,649 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:10,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401020989] [2022-02-24 03:42:10,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1401020989] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:10,649 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:10,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-24 03:42:10,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116309202] [2022-02-24 03:42:10,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:10,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-24 03:42:10,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:10,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-24 03:42:10,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 03:42:10,650 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:12,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:12,214 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2022-02-24 03:42:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 03:42:12,215 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 03:42:12,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:12,216 INFO L225 Difference]: With dead ends: 63 [2022-02-24 03:42:12,216 INFO L226 Difference]: Without dead ends: 56 [2022-02-24 03:42:12,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=249, Invalid=6891, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 03:42:12,217 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:12,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 221 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:42:12,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-24 03:42:12,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-02-24 03:42:12,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:12,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-02-24 03:42:12,222 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2022-02-24 03:42:12,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:12,222 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-02-24 03:42:12,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:12,222 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-02-24 03:42:12,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 03:42:12,222 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:12,223 INFO L514 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:12,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 03:42:12,223 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:12,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:12,223 INFO L85 PathProgramCache]: Analyzing trace with hash -287401154, now seen corresponding path program 41 times [2022-02-24 03:42:12,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:12,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713911672] [2022-02-24 03:42:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:12,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:12,382 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:42:12,382 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:13,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:13,306 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:13,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713911672] [2022-02-24 03:42:13,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [713911672] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:13,306 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:13,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-24 03:42:13,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994492028] [2022-02-24 03:42:13,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:13,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-24 03:42:13,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:13,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-24 03:42:13,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 03:42:13,308 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:17,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:17,368 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-02-24 03:42:17,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 03:42:17,370 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-24 03:42:17,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:17,371 INFO L225 Difference]: With dead ends: 64 [2022-02-24 03:42:17,371 INFO L226 Difference]: Without dead ends: 57 [2022-02-24 03:42:17,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=337, Invalid=7145, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 03:42:17,372 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 2145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:17,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 225 Invalid, 2145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:42:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-24 03:42:17,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-02-24 03:42:17,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-02-24 03:42:17,376 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2022-02-24 03:42:17,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:17,377 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-02-24 03:42:17,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:17,377 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-02-24 03:42:17,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 03:42:17,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:17,377 INFO L514 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:17,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 03:42:17,377 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:17,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:17,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1912897425, now seen corresponding path program 42 times [2022-02-24 03:42:17,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:17,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506441392] [2022-02-24 03:42:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:17,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:17,532 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:42:17,532 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:18,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:18,468 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:18,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506441392] [2022-02-24 03:42:18,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1506441392] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:18,468 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:18,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-24 03:42:18,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497283554] [2022-02-24 03:42:18,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:18,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-24 03:42:18,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:18,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-24 03:42:18,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 03:42:18,470 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:20,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:20,127 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2022-02-24 03:42:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 03:42:20,127 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 03:42:20,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:20,127 INFO L225 Difference]: With dead ends: 65 [2022-02-24 03:42:20,128 INFO L226 Difference]: Without dead ends: 58 [2022-02-24 03:42:20,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2022-02-24 03:42:20,129 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:20,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 231 Invalid, 2281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:42:20,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-24 03:42:20,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-02-24 03:42:20,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-02-24 03:42:20,134 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2022-02-24 03:42:20,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:20,134 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-02-24 03:42:20,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:20,134 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-02-24 03:42:20,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 03:42:20,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:20,134 INFO L514 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:20,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 03:42:20,135 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:20,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:20,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1402676638, now seen corresponding path program 43 times [2022-02-24 03:42:20,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:20,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857417749] [2022-02-24 03:42:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:20,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:20,296 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:42:20,297 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:21,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:21,293 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:21,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857417749] [2022-02-24 03:42:21,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1857417749] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:21,293 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:21,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-24 03:42:21,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202539608] [2022-02-24 03:42:21,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:21,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-24 03:42:21,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:21,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-24 03:42:21,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 03:42:21,295 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:22,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:22,963 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-02-24 03:42:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-24 03:42:22,964 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-02-24 03:42:22,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:22,964 INFO L225 Difference]: With dead ends: 66 [2022-02-24 03:42:22,964 INFO L226 Difference]: Without dead ends: 59 [2022-02-24 03:42:22,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=267, Invalid=7923, Unknown=0, NotChecked=0, Total=8190 [2022-02-24 03:42:22,965 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 2333 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 2378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:22,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 236 Invalid, 2378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2333 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:42:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-24 03:42:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-02-24 03:42:22,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-02-24 03:42:22,970 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2022-02-24 03:42:22,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:22,970 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-02-24 03:42:22,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:22,970 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-02-24 03:42:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 03:42:22,970 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:22,971 INFO L514 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:22,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 03:42:22,971 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:22,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:22,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1529265871, now seen corresponding path program 44 times [2022-02-24 03:42:22,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:22,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247667300] [2022-02-24 03:42:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:22,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:23,132 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:42:23,132 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:24,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:24,252 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:24,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247667300] [2022-02-24 03:42:24,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [247667300] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:24,252 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:24,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-24 03:42:24,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627938553] [2022-02-24 03:42:24,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:24,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-24 03:42:24,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:24,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-24 03:42:24,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 03:42:24,254 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:26,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:26,079 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2022-02-24 03:42:26,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 03:42:26,079 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 03:42:26,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:26,080 INFO L225 Difference]: With dead ends: 67 [2022-02-24 03:42:26,080 INFO L226 Difference]: Without dead ends: 60 [2022-02-24 03:42:26,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=273, Invalid=8283, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 03:42:26,082 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 2431 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 2477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:26,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 241 Invalid, 2477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2431 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:42:26,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-24 03:42:26,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-02-24 03:42:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2022-02-24 03:42:26,086 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2022-02-24 03:42:26,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:26,087 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2022-02-24 03:42:26,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2022-02-24 03:42:26,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 03:42:26,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:26,087 INFO L514 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:26,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 03:42:26,088 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:26,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:26,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2069796862, now seen corresponding path program 45 times [2022-02-24 03:42:26,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:26,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334756150] [2022-02-24 03:42:26,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:26,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:26,256 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:42:26,256 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:27,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:27,369 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:27,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334756150] [2022-02-24 03:42:27,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [334756150] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:27,370 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:27,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-24 03:42:27,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078253634] [2022-02-24 03:42:27,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:27,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-24 03:42:27,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:27,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-24 03:42:27,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 03:42:27,371 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:29,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:29,298 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-02-24 03:42:29,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 03:42:29,299 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-24 03:42:29,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:29,299 INFO L225 Difference]: With dead ends: 68 [2022-02-24 03:42:29,299 INFO L226 Difference]: Without dead ends: 61 [2022-02-24 03:42:29,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=279, Invalid=8651, Unknown=0, NotChecked=0, Total=8930 [2022-02-24 03:42:29,300 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 2578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:29,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 246 Invalid, 2578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:42:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-24 03:42:29,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-02-24 03:42:29,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:29,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-02-24 03:42:29,305 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2022-02-24 03:42:29,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:29,305 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-02-24 03:42:29,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:29,305 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-02-24 03:42:29,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 03:42:29,306 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:29,306 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:29,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 03:42:29,306 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:29,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:29,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1971591889, now seen corresponding path program 46 times [2022-02-24 03:42:29,306 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:29,306 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474909187] [2022-02-24 03:42:29,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:29,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:29,462 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:42:29,462 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:30,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:30,652 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:30,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474909187] [2022-02-24 03:42:30,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474909187] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:30,652 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:30,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-24 03:42:30,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018192862] [2022-02-24 03:42:30,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:30,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-24 03:42:30,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:30,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-24 03:42:30,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 03:42:30,653 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:36,142 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2022-02-24 03:42:36,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 03:42:36,142 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 03:42:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:36,142 INFO L225 Difference]: With dead ends: 69 [2022-02-24 03:42:36,142 INFO L226 Difference]: Without dead ends: 62 [2022-02-24 03:42:36,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=377, Invalid=8935, Unknown=0, NotChecked=0, Total=9312 [2022-02-24 03:42:36,144 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 2541 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:36,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 250 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2541 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:42:36,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-24 03:42:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-02-24 03:42:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2022-02-24 03:42:36,149 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2022-02-24 03:42:36,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:36,149 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2022-02-24 03:42:36,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2022-02-24 03:42:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 03:42:36,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:36,150 INFO L514 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:36,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 03:42:36,150 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:36,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:36,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1072762274, now seen corresponding path program 47 times [2022-02-24 03:42:36,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:36,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703632586] [2022-02-24 03:42:36,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:36,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:36,345 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:42:36,345 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:37,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:37,638 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:37,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703632586] [2022-02-24 03:42:37,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1703632586] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:37,639 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:37,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-24 03:42:37,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550265770] [2022-02-24 03:42:37,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:37,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-24 03:42:37,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:37,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-24 03:42:37,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 03:42:37,640 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:43,993 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-02-24 03:42:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 03:42:43,995 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-24 03:42:43,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:43,995 INFO L225 Difference]: With dead ends: 70 [2022-02-24 03:42:43,995 INFO L226 Difference]: Without dead ends: 63 [2022-02-24 03:42:43,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=385, Invalid=9317, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 03:42:43,996 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 2643 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 2739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:43,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 255 Invalid, 2739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2643 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:42:43,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-24 03:42:44,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-02-24 03:42:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 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) [2022-02-24 03:42:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-02-24 03:42:44,000 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2022-02-24 03:42:44,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:44,001 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-02-24 03:42:44,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:44,001 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-02-24 03:42:44,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 03:42:44,001 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:44,001 INFO L514 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:44,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 03:42:44,002 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:44,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:44,002 INFO L85 PathProgramCache]: Analyzing trace with hash -958460815, now seen corresponding path program 48 times [2022-02-24 03:42:44,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:44,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219647408] [2022-02-24 03:42:44,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:44,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:44,166 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:42:44,167 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:45,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:45,256 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:45,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219647408] [2022-02-24 03:42:45,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1219647408] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:45,256 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:45,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-24 03:42:45,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63870153] [2022-02-24 03:42:45,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:45,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-24 03:42:45,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:45,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-24 03:42:45,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 03:42:45,257 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:47,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:47,435 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2022-02-24 03:42:47,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-24 03:42:47,436 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 03:42:47,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:47,436 INFO L225 Difference]: With dead ends: 71 [2022-02-24 03:42:47,436 INFO L226 Difference]: Without dead ends: 64 [2022-02-24 03:42:47,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=297, Invalid=9803, Unknown=0, NotChecked=0, Total=10100 [2022-02-24 03:42:47,437 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 2843 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 2893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:47,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 261 Invalid, 2893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2843 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:42:47,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-24 03:42:47,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-02-24 03:42:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-02-24 03:42:47,440 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2022-02-24 03:42:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:47,441 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-02-24 03:42:47,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-02-24 03:42:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 03:42:47,441 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:47,441 INFO L514 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:47,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 03:42:47,441 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:47,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:47,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1710082882, now seen corresponding path program 49 times [2022-02-24 03:42:47,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:47,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485060906] [2022-02-24 03:42:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:47,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:47,606 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:42:47,606 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:48,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:48,775 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:48,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485060906] [2022-02-24 03:42:48,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [485060906] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:48,775 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:48,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-24 03:42:48,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424567976] [2022-02-24 03:42:48,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:48,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-24 03:42:48,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:48,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-24 03:42:48,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 03:42:48,776 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:50,925 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-02-24 03:42:50,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 03:42:50,926 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-24 03:42:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:50,926 INFO L225 Difference]: With dead ends: 72 [2022-02-24 03:42:50,926 INFO L226 Difference]: Without dead ends: 65 [2022-02-24 03:42:50,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=303, Invalid=10203, Unknown=0, NotChecked=0, Total=10506 [2022-02-24 03:42:50,928 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 2951 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 3002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:50,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 266 Invalid, 3002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2951 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:42:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-24 03:42:50,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-02-24 03:42:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-02-24 03:42:50,933 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2022-02-24 03:42:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:50,933 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-02-24 03:42:50,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:50,933 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-02-24 03:42:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 03:42:50,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:50,934 INFO L514 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:50,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 03:42:50,934 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:50,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:50,934 INFO L85 PathProgramCache]: Analyzing trace with hash 759436817, now seen corresponding path program 50 times [2022-02-24 03:42:50,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:50,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571169166] [2022-02-24 03:42:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:50,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:51,154 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:42:51,155 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:42:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:52,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:42:52,647 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:52,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571169166] [2022-02-24 03:42:52,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1571169166] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:52,647 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:52,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-24 03:42:52,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794771022] [2022-02-24 03:42:52,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:52,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-24 03:42:52,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:52,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-24 03:42:52,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 03:42:52,649 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 54 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 53 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:00,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:00,678 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2022-02-24 03:43:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 03:43:00,678 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 53 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 03:43:00,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:00,679 INFO L225 Difference]: With dead ends: 73 [2022-02-24 03:43:00,679 INFO L226 Difference]: Without dead ends: 66 [2022-02-24 03:43:00,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=409, Invalid=10511, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 03:43:00,680 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 2961 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 3063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:00,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 270 Invalid, 3063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2961 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 03:43:00,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-24 03:43:00,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-02-24 03:43:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2022-02-24 03:43:00,685 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2022-02-24 03:43:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:00,686 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2022-02-24 03:43:00,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 53 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2022-02-24 03:43:00,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 03:43:00,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:00,686 INFO L514 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:00,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 03:43:00,686 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:00,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:00,687 INFO L85 PathProgramCache]: Analyzing trace with hash 5136158, now seen corresponding path program 51 times [2022-02-24 03:43:00,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:00,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62902608] [2022-02-24 03:43:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:00,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:00,859 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:43:00,859 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:43:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:02,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:02,088 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:02,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62902608] [2022-02-24 03:43:02,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [62902608] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:02,088 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:02,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-02-24 03:43:02,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700980974] [2022-02-24 03:43:02,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:02,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-24 03:43:02,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:02,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-24 03:43:02,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 03:43:02,089 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:04,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:04,344 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-02-24 03:43:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-24 03:43:04,344 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-24 03:43:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:04,345 INFO L225 Difference]: With dead ends: 74 [2022-02-24 03:43:04,345 INFO L226 Difference]: Without dead ends: 67 [2022-02-24 03:43:04,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=315, Invalid=11027, Unknown=0, NotChecked=0, Total=11342 [2022-02-24 03:43:04,346 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 3173 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 3226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:04,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 276 Invalid, 3226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 3173 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 03:43:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-24 03:43:04,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-02-24 03:43:04,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-02-24 03:43:04,351 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2022-02-24 03:43:04,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:04,351 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-02-24 03:43:04,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:04,351 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-02-24 03:43:04,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 03:43:04,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:04,352 INFO L514 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:04,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 03:43:04,352 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:04,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:04,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1903347791, now seen corresponding path program 52 times [2022-02-24 03:43:04,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:04,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019616820] [2022-02-24 03:43:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:04,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:04,515 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:43:04,515 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:43:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:05,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:05,756 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:05,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019616820] [2022-02-24 03:43:05,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2019616820] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:05,756 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:05,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-24 03:43:05,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893068824] [2022-02-24 03:43:05,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:05,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-24 03:43:05,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:05,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-24 03:43:05,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 03:43:05,757 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 56 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:08,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:08,162 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2022-02-24 03:43:08,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-24 03:43:08,162 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 03:43:08,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:08,163 INFO L225 Difference]: With dead ends: 75 [2022-02-24 03:43:08,163 INFO L226 Difference]: Without dead ends: 68 [2022-02-24 03:43:08,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=321, Invalid=11451, Unknown=0, NotChecked=0, Total=11772 [2022-02-24 03:43:08,164 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 3287 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:08,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 281 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3287 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 03:43:08,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-24 03:43:08,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-02-24 03:43:08,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2022-02-24 03:43:08,169 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2022-02-24 03:43:08,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:08,169 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2022-02-24 03:43:08,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2022-02-24 03:43:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 03:43:08,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:08,169 INFO L514 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:08,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 03:43:08,170 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:08,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:08,170 INFO L85 PathProgramCache]: Analyzing trace with hash -936808066, now seen corresponding path program 53 times [2022-02-24 03:43:08,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:08,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024500448] [2022-02-24 03:43:08,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:08,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:08,335 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:43:08,335 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:43:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:09,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:09,716 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:09,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024500448] [2022-02-24 03:43:09,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2024500448] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:09,716 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:09,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-24 03:43:09,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114137847] [2022-02-24 03:43:09,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:09,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-24 03:43:09,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:09,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-24 03:43:09,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 03:43:09,718 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:12,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:12,251 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-02-24 03:43:12,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 03:43:12,252 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-02-24 03:43:12,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:12,253 INFO L225 Difference]: With dead ends: 76 [2022-02-24 03:43:12,253 INFO L226 Difference]: Without dead ends: 69 [2022-02-24 03:43:12,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=327, Invalid=11883, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 03:43:12,254 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 3403 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 3458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:12,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 286 Invalid, 3458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 3403 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:43:12,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-24 03:43:12,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-02-24 03:43:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-02-24 03:43:12,258 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2022-02-24 03:43:12,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:12,259 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-02-24 03:43:12,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:12,259 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-02-24 03:43:12,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 03:43:12,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:12,259 INFO L514 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:12,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 03:43:12,259 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:12,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:12,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1038847663, now seen corresponding path program 54 times [2022-02-24 03:43:12,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:12,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795166471] [2022-02-24 03:43:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:12,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:12,435 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:43:12,435 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:43:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:13,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:13,795 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:13,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795166471] [2022-02-24 03:43:13,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [795166471] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:13,795 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:13,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-02-24 03:43:13,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782158513] [2022-02-24 03:43:13,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:13,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-24 03:43:13,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:13,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-24 03:43:13,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 03:43:13,798 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 58 states, 58 states have (on average 1.103448275862069) internal successors, (64), 57 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) [2022-02-24 03:43:16,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:16,425 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2022-02-24 03:43:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-24 03:43:16,426 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.103448275862069) internal successors, (64), 57 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 68 [2022-02-24 03:43:16,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:16,426 INFO L225 Difference]: With dead ends: 77 [2022-02-24 03:43:16,426 INFO L226 Difference]: Without dead ends: 70 [2022-02-24 03:43:16,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=333, Invalid=12323, Unknown=0, NotChecked=0, Total=12656 [2022-02-24 03:43:16,428 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 3521 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 3577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:16,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 291 Invalid, 3577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3521 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:43:16,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-24 03:43:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-02-24 03:43:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:16,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2022-02-24 03:43:16,440 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2022-02-24 03:43:16,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:16,441 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2022-02-24 03:43:16,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.103448275862069) internal successors, (64), 57 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) [2022-02-24 03:43:16,441 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2022-02-24 03:43:16,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 03:43:16,441 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:16,441 INFO L514 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:16,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 03:43:16,442 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:16,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:16,442 INFO L85 PathProgramCache]: Analyzing trace with hash 92892126, now seen corresponding path program 55 times [2022-02-24 03:43:16,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:16,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062494871] [2022-02-24 03:43:16,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:16,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:16,630 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:43:16,630 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:43:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:18,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:18,037 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:18,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062494871] [2022-02-24 03:43:18,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2062494871] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:18,037 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:18,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-24 03:43:18,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68844875] [2022-02-24 03:43:18,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:18,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-24 03:43:18,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:18,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-24 03:43:18,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 03:43:18,038 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:20,727 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-02-24 03:43:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 03:43:20,727 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 03:43:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:20,727 INFO L225 Difference]: With dead ends: 78 [2022-02-24 03:43:20,728 INFO L226 Difference]: Without dead ends: 71 [2022-02-24 03:43:20,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=339, Invalid=12771, Unknown=0, NotChecked=0, Total=13110 [2022-02-24 03:43:20,729 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 3641 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 3698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:20,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 296 Invalid, 3698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3641 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:43:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-24 03:43:20,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-02-24 03:43:20,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:20,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-02-24 03:43:20,734 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2022-02-24 03:43:20,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:20,734 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-02-24 03:43:20,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:20,734 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-02-24 03:43:20,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 03:43:20,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:20,734 INFO L514 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:20,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 03:43:20,735 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:20,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:20,735 INFO L85 PathProgramCache]: Analyzing trace with hash 817087217, now seen corresponding path program 56 times [2022-02-24 03:43:20,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:20,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76119044] [2022-02-24 03:43:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:20,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:20,911 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:43:20,911 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:43:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:22,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:22,674 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:22,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76119044] [2022-02-24 03:43:22,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [76119044] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:22,675 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:22,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-24 03:43:22,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474733100] [2022-02-24 03:43:22,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:22,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-24 03:43:22,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:22,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-24 03:43:22,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 03:43:22,676 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 60 states, 60 states have (on average 1.1) internal successors, (66), 59 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) [2022-02-24 03:43:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:34,249 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2022-02-24 03:43:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-24 03:43:34,250 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.1) internal successors, (66), 59 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 70 [2022-02-24 03:43:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:34,250 INFO L225 Difference]: With dead ends: 79 [2022-02-24 03:43:34,250 INFO L226 Difference]: Without dead ends: 72 [2022-02-24 03:43:34,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=457, Invalid=13115, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 03:43:34,251 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 3651 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 3765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 3651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:34,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 300 Invalid, 3765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3651 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:43:34,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-24 03:43:34,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-02-24 03:43:34,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:34,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2022-02-24 03:43:34,257 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2022-02-24 03:43:34,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:34,257 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2022-02-24 03:43:34,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.1) internal successors, (66), 59 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) [2022-02-24 03:43:34,257 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2022-02-24 03:43:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 03:43:34,258 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:34,258 INFO L514 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:34,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 03:43:34,258 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:34,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:34,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1792298558, now seen corresponding path program 57 times [2022-02-24 03:43:34,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:34,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084148940] [2022-02-24 03:43:34,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:34,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:34,432 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:43:34,432 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:43:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:35,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:35,943 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:35,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084148940] [2022-02-24 03:43:35,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2084148940] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:35,943 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:35,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-02-24 03:43:35,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774935708] [2022-02-24 03:43:35,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:35,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-24 03:43:35,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:35,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-24 03:43:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 03:43:35,944 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:38,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:38,857 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-02-24 03:43:38,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-24 03:43:38,858 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-24 03:43:38,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:38,858 INFO L225 Difference]: With dead ends: 80 [2022-02-24 03:43:38,858 INFO L226 Difference]: Without dead ends: 73 [2022-02-24 03:43:38,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=351, Invalid=13691, Unknown=0, NotChecked=0, Total=14042 [2022-02-24 03:43:38,859 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 3887 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 3946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:38,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 306 Invalid, 3946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3887 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:43:38,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-24 03:43:38,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-02-24 03:43:38,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2022-02-24 03:43:38,865 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2022-02-24 03:43:38,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:38,865 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2022-02-24 03:43:38,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:38,865 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2022-02-24 03:43:38,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 03:43:38,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:38,866 INFO L514 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:38,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 03:43:38,866 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:38,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:38,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1959079057, now seen corresponding path program 58 times [2022-02-24 03:43:38,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:38,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590126996] [2022-02-24 03:43:38,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:38,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:39,079 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:43:39,079 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:43:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:40,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:40,657 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:40,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590126996] [2022-02-24 03:43:40,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [590126996] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:40,657 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:40,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-24 03:43:40,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843552243] [2022-02-24 03:43:40,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:40,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-24 03:43:40,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:40,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-24 03:43:40,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 03:43:40,658 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 62 states, 62 states have (on average 1.096774193548387) internal successors, (68), 61 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:43,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:43,566 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2022-02-24 03:43:43,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-24 03:43:43,566 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.096774193548387) internal successors, (68), 61 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 03:43:43,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:43,567 INFO L225 Difference]: With dead ends: 81 [2022-02-24 03:43:43,567 INFO L226 Difference]: Without dead ends: 74 [2022-02-24 03:43:43,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=357, Invalid=14163, Unknown=0, NotChecked=0, Total=14520 [2022-02-24 03:43:43,568 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 4013 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 4073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 4013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:43,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 311 Invalid, 4073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 4013 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:43:43,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-24 03:43:43,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-02-24 03:43:43,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2022-02-24 03:43:43,572 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2022-02-24 03:43:43,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:43,572 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2022-02-24 03:43:43,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.096774193548387) internal successors, (68), 61 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:43,572 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2022-02-24 03:43:43,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 03:43:43,573 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:43,573 INFO L514 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:43,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 03:43:43,573 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:43,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:43,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1460660066, now seen corresponding path program 59 times [2022-02-24 03:43:43,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:43,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230194567] [2022-02-24 03:43:43,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:43,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:43,761 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:43:43,761 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:43:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:45,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:45,329 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:45,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230194567] [2022-02-24 03:43:45,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [230194567] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:45,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:45,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-24 03:43:45,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931417679] [2022-02-24 03:43:45,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:45,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-24 03:43:45,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:45,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-24 03:43:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 03:43:45,330 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:48,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:48,427 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-02-24 03:43:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-24 03:43:48,428 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have 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 [2022-02-24 03:43:48,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:48,428 INFO L225 Difference]: With dead ends: 82 [2022-02-24 03:43:48,428 INFO L226 Difference]: Without dead ends: 75 [2022-02-24 03:43:48,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=363, Invalid=14643, Unknown=0, NotChecked=0, Total=15006 [2022-02-24 03:43:48,430 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 4141 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 4202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 4141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:48,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 316 Invalid, 4202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 4141 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:43:48,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-24 03:43:48,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-02-24 03:43:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-02-24 03:43:48,436 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2022-02-24 03:43:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:48,436 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-02-24 03:43:48,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-02-24 03:43:48,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 03:43:48,437 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:48,437 INFO L514 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:48,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 03:43:48,437 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:48,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:48,437 INFO L85 PathProgramCache]: Analyzing trace with hash -98390479, now seen corresponding path program 60 times [2022-02-24 03:43:48,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:48,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829638544] [2022-02-24 03:43:48,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:48,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:48,644 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:43:48,645 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:43:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:50,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:50,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:50,824 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:50,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829638544] [2022-02-24 03:43:50,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1829638544] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:50,824 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:50,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-02-24 03:43:50,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543099445] [2022-02-24 03:43:50,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:50,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-24 03:43:50,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:50,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-24 03:43:50,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 03:43:50,826 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 64 states, 64 states have (on average 1.09375) internal successors, (70), 63 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:08,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:08,367 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2022-02-24 03:44:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-24 03:44:08,368 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.09375) internal successors, (70), 63 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 03:44:08,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:08,368 INFO L225 Difference]: With dead ends: 83 [2022-02-24 03:44:08,368 INFO L226 Difference]: Without dead ends: 76 [2022-02-24 03:44:08,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=489, Invalid=15011, Unknown=0, NotChecked=0, Total=15500 [2022-02-24 03:44:08,369 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 4151 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 4273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 4151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:08,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 320 Invalid, 4273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 4151 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 03:44:08,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-24 03:44:08,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-02-24 03:44:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:08,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2022-02-24 03:44:08,374 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2022-02-24 03:44:08,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:08,374 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2022-02-24 03:44:08,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.09375) internal successors, (70), 63 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:08,375 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2022-02-24 03:44:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 03:44:08,375 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:08,375 INFO L514 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:08,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 03:44:08,375 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:08,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:08,375 INFO L85 PathProgramCache]: Analyzing trace with hash -817706242, now seen corresponding path program 61 times [2022-02-24 03:44:08,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:08,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487968813] [2022-02-24 03:44:08,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:08,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:08,553 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:44:08,554 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:44:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:10,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:44:10,245 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:10,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487968813] [2022-02-24 03:44:10,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [487968813] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:10,245 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:10,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-24 03:44:10,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605150799] [2022-02-24 03:44:10,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:10,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-24 03:44:10,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:10,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-24 03:44:10,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 03:44:10,246 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 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) [2022-02-24 03:44:13,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:13,512 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-02-24 03:44:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-24 03:44:13,512 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 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 75 [2022-02-24 03:44:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:13,513 INFO L225 Difference]: With dead ends: 84 [2022-02-24 03:44:13,513 INFO L226 Difference]: Without dead ends: 77 [2022-02-24 03:44:13,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=375, Invalid=15627, Unknown=0, NotChecked=0, Total=16002 [2022-02-24 03:44:13,515 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 4403 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 4466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 4403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:13,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 326 Invalid, 4466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 4403 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 03:44:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-24 03:44:13,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-02-24 03:44:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2022-02-24 03:44:13,521 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2022-02-24 03:44:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:13,521 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2022-02-24 03:44:13,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 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) [2022-02-24 03:44:13,521 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2022-02-24 03:44:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 03:44:13,521 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:13,522 INFO L514 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:13,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 03:44:13,522 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:13,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:13,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1641658415, now seen corresponding path program 62 times [2022-02-24 03:44:13,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:13,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603548032] [2022-02-24 03:44:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:13,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:13,704 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:44:13,704 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:44:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:16,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:44:16,033 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:16,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603548032] [2022-02-24 03:44:16,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [603548032] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:16,034 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:16,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-24 03:44:16,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664132776] [2022-02-24 03:44:16,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:16,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-24 03:44:16,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:16,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-24 03:44:16,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 03:44:16,036 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 66 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 65 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) [2022-02-24 03:44:42,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:42,102 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2022-02-24 03:44:42,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-24 03:44:42,103 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 65 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 76 [2022-02-24 03:44:42,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:42,104 INFO L225 Difference]: With dead ends: 85 [2022-02-24 03:44:42,104 INFO L226 Difference]: Without dead ends: 78 [2022-02-24 03:44:42,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=505, Invalid=16007, Unknown=0, NotChecked=0, Total=16512 [2022-02-24 03:44:42,106 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 4413 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 4539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 4413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:42,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 330 Invalid, 4539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 4413 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 03:44:42,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-24 03:44:42,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-02-24 03:44:42,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:42,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2022-02-24 03:44:42,111 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2022-02-24 03:44:42,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:42,112 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2022-02-24 03:44:42,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 65 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) [2022-02-24 03:44:42,112 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2022-02-24 03:44:42,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 03:44:42,112 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:42,112 INFO L514 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:42,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 03:44:42,113 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:42,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:42,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1414372002, now seen corresponding path program 63 times [2022-02-24 03:44:42,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:42,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393359276] [2022-02-24 03:44:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:42,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:42,295 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:44:42,296 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:44:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:45,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:44:45,202 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:45,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393359276] [2022-02-24 03:44:45,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [393359276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:45,202 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:45,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-24 03:44:45,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293684142] [2022-02-24 03:44:45,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:45,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-24 03:44:45,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:45,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-24 03:44:45,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 03:44:45,203 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 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) [2022-02-24 03:45:19,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:19,999 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-02-24 03:45:19,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-24 03:45:19,999 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 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 77 [2022-02-24 03:45:19,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:20,000 INFO L225 Difference]: With dead ends: 86 [2022-02-24 03:45:20,000 INFO L226 Difference]: Without dead ends: 79 [2022-02-24 03:45:20,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=513, Invalid=16517, Unknown=0, NotChecked=0, Total=17030 [2022-02-24 03:45:20,001 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 4547 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 4675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:20,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 335 Invalid, 4675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4547 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 03:45:20,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-24 03:45:20,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-02-24 03:45:20,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-02-24 03:45:20,006 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2022-02-24 03:45:20,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:20,007 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-02-24 03:45:20,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 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) [2022-02-24 03:45:20,007 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-02-24 03:45:20,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 03:45:20,007 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:20,007 INFO L514 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:20,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 03:45:20,007 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:20,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:20,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1336539505, now seen corresponding path program 64 times [2022-02-24 03:45:20,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:20,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613220620] [2022-02-24 03:45:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:20,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:20,188 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:45:20,188 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:45:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:22,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:22,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:22,169 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:22,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613220620] [2022-02-24 03:45:22,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1613220620] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:22,169 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:22,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-24 03:45:22,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117042589] [2022-02-24 03:45:22,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:22,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-24 03:45:22,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:22,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-24 03:45:22,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 03:45:22,170 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 68 states, 68 states have (on average 1.088235294117647) internal successors, (74), 67 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:25,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:25,832 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2022-02-24 03:45:25,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-24 03:45:25,833 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.088235294117647) internal successors, (74), 67 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-24 03:45:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:25,834 INFO L225 Difference]: With dead ends: 87 [2022-02-24 03:45:25,834 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 03:45:25,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=393, Invalid=17163, Unknown=0, NotChecked=0, Total=17556 [2022-02-24 03:45:25,836 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 4811 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 4877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 4811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:25,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 341 Invalid, 4877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 4811 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 03:45:25,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 03:45:25,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-02-24 03:45:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:25,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2022-02-24 03:45:25,842 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2022-02-24 03:45:25,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:25,843 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2022-02-24 03:45:25,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.088235294117647) internal successors, (74), 67 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:25,843 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2022-02-24 03:45:25,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 03:45:25,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:25,843 INFO L514 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:25,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 03:45:25,844 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:25,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:25,844 INFO L85 PathProgramCache]: Analyzing trace with hash 715450302, now seen corresponding path program 65 times [2022-02-24 03:45:25,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:25,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040228493] [2022-02-24 03:45:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:25,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:26,073 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:45:26,073 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:45:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:28,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:28,050 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:28,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040228493] [2022-02-24 03:45:28,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1040228493] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:28,050 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:28,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-24 03:45:28,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623070153] [2022-02-24 03:45:28,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:28,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-24 03:45:28,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:28,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-24 03:45:28,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 03:45:28,052 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:31,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:31,799 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-02-24 03:45:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-24 03:45:31,800 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have 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 [2022-02-24 03:45:31,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:31,800 INFO L225 Difference]: With dead ends: 88 [2022-02-24 03:45:31,801 INFO L226 Difference]: Without dead ends: 81 [2022-02-24 03:45:31,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=399, Invalid=17691, Unknown=0, NotChecked=0, Total=18090 [2022-02-24 03:45:31,802 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 4951 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 5018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:31,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 346 Invalid, 5018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4951 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 03:45:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-24 03:45:31,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-02-24 03:45:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:31,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2022-02-24 03:45:31,808 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2022-02-24 03:45:31,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:31,809 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2022-02-24 03:45:31,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:31,809 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2022-02-24 03:45:31,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 03:45:31,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:31,809 INFO L514 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:31,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 03:45:31,809 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:31,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:31,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1358445807, now seen corresponding path program 66 times [2022-02-24 03:45:31,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:31,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715920793] [2022-02-24 03:45:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:31,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:32,002 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:45:32,002 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:45:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:34,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:34,101 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:34,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715920793] [2022-02-24 03:45:34,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [715920793] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:34,101 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:34,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-24 03:45:34,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174663933] [2022-02-24 03:45:34,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:34,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-24 03:45:34,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:34,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-24 03:45:34,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 03:45:34,102 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 70 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 69 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:38,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:38,033 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2022-02-24 03:45:38,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-24 03:45:38,033 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 69 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-24 03:45:38,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:38,034 INFO L225 Difference]: With dead ends: 89 [2022-02-24 03:45:38,034 INFO L226 Difference]: Without dead ends: 82 [2022-02-24 03:45:38,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2211 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=405, Invalid=18227, Unknown=0, NotChecked=0, Total=18632 [2022-02-24 03:45:38,035 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 5093 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 5161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 5093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:38,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 351 Invalid, 5161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 5093 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 03:45:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-24 03:45:38,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-02-24 03:45:38,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2022-02-24 03:45:38,041 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2022-02-24 03:45:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:38,041 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2022-02-24 03:45:38,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 69 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:38,041 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2022-02-24 03:45:38,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-24 03:45:38,042 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:38,042 INFO L514 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:38,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 03:45:38,042 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:38,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:38,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1224715746, now seen corresponding path program 67 times [2022-02-24 03:45:38,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:38,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046518190] [2022-02-24 03:45:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:38,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:38,239 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:45:38,240 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:45:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:40,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:40,283 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:40,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046518190] [2022-02-24 03:45:40,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1046518190] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:40,283 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:40,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-24 03:45:40,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854627062] [2022-02-24 03:45:40,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:40,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-24 03:45:40,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:40,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-24 03:45:40,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 03:45:40,284 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:44,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:44,364 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-02-24 03:45:44,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-24 03:45:44,364 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have 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 [2022-02-24 03:45:44,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:44,365 INFO L225 Difference]: With dead ends: 90 [2022-02-24 03:45:44,365 INFO L226 Difference]: Without dead ends: 83 [2022-02-24 03:45:44,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=411, Invalid=18771, Unknown=0, NotChecked=0, Total=19182 [2022-02-24 03:45:44,367 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 5237 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 5306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 5237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:44,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 356 Invalid, 5306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 5237 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 03:45:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-24 03:45:44,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-02-24 03:45:44,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 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) [2022-02-24 03:45:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2022-02-24 03:45:44,373 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2022-02-24 03:45:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:44,374 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2022-02-24 03:45:44,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2022-02-24 03:45:44,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 03:45:44,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:44,374 INFO L514 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:44,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 03:45:44,375 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:44,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:44,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1374051151, now seen corresponding path program 68 times [2022-02-24 03:45:44,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:44,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227524458] [2022-02-24 03:45:44,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:44,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:44,622 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:45:44,622 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:45:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:46,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:46,958 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:46,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227524458] [2022-02-24 03:45:46,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1227524458] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:46,958 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:46,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-24 03:45:46,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671582658] [2022-02-24 03:45:46,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:46,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-24 03:45:46,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:46,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-24 03:45:46,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 03:45:46,959 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 72 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 71 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:51,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:51,575 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2022-02-24 03:45:51,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-24 03:45:51,576 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 71 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-02-24 03:45:51,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:51,577 INFO L225 Difference]: With dead ends: 91 [2022-02-24 03:45:51,577 INFO L226 Difference]: Without dead ends: 84 [2022-02-24 03:45:51,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=417, Invalid=19323, Unknown=0, NotChecked=0, Total=19740 [2022-02-24 03:45:51,579 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 5383 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 5453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 5383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:51,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 361 Invalid, 5453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 5383 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 03:45:51,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-24 03:45:51,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-02-24 03:45:51,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2022-02-24 03:45:51,584 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2022-02-24 03:45:51,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:51,584 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2022-02-24 03:45:51,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 71 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2022-02-24 03:45:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 03:45:51,585 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:51,585 INFO L514 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:51,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 03:45:51,585 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:51,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:51,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1708481410, now seen corresponding path program 69 times [2022-02-24 03:45:51,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:51,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748167703] [2022-02-24 03:45:51,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:51,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:51,780 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:45:51,780 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:45:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:53,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:53,908 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:53,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748167703] [2022-02-24 03:45:53,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1748167703] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:53,908 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:53,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-24 03:45:53,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407262701] [2022-02-24 03:45:53,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:53,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-24 03:45:53,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:53,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-24 03:45:53,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 03:45:53,910 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:58,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:58,140 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-02-24 03:45:58,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-24 03:45:58,141 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have 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 [2022-02-24 03:45:58,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:58,141 INFO L225 Difference]: With dead ends: 92 [2022-02-24 03:45:58,141 INFO L226 Difference]: Without dead ends: 85 [2022-02-24 03:45:58,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=423, Invalid=19883, Unknown=0, NotChecked=0, Total=20306 [2022-02-24 03:45:58,143 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 5531 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 5602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 5531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:58,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 366 Invalid, 5602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 5531 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 03:45:58,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-24 03:45:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-02-24 03:45:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2022-02-24 03:45:58,147 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2022-02-24 03:45:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:58,147 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2022-02-24 03:45:58,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2022-02-24 03:45:58,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-24 03:45:58,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:58,148 INFO L514 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:58,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 03:45:58,148 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:58,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:58,148 INFO L85 PathProgramCache]: Analyzing trace with hash 809082449, now seen corresponding path program 70 times [2022-02-24 03:45:58,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:58,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988790075] [2022-02-24 03:45:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:58,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:58,349 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:45:58,349 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:45:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:02,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:02,197 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:02,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988790075] [2022-02-24 03:46:02,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1988790075] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:02,197 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:02,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-24 03:46:02,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920567266] [2022-02-24 03:46:02,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:02,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-24 03:46:02,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-24 03:46:02,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 03:46:02,199 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 74 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 73 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:03,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:03,033 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2022-02-24 03:47:03,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-24 03:47:03,034 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 73 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-02-24 03:47:03,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:03,034 INFO L225 Difference]: With dead ends: 93 [2022-02-24 03:47:03,034 INFO L226 Difference]: Without dead ends: 86 [2022-02-24 03:47:03,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 62.2s TimeCoverageRelationStatistics Valid=569, Invalid=20311, Unknown=0, NotChecked=0, Total=20880 [2022-02-24 03:47:03,036 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 5541 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 5683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 5541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:03,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 370 Invalid, 5683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 5541 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-24 03:47:03,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-24 03:47:03,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-02-24 03:47:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2022-02-24 03:47:03,042 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2022-02-24 03:47:03,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:03,042 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2022-02-24 03:47:03,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 73 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:03,042 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2022-02-24 03:47:03,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 03:47:03,043 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:03,043 INFO L514 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:03,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 03:47:03,043 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:03,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:03,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1544150750, now seen corresponding path program 71 times [2022-02-24 03:47:03,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:03,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129075309] [2022-02-24 03:47:03,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:03,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:03,273 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:47:03,273 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:47:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:05,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:05,957 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:05,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129075309] [2022-02-24 03:47:05,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [129075309] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:05,958 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:05,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-24 03:47:05,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175293754] [2022-02-24 03:47:05,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:05,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-24 03:47:05,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:05,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-24 03:47:05,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 03:47:05,959 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:11,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:11,100 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-02-24 03:47:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-24 03:47:11,100 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have 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 [2022-02-24 03:47:11,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:11,100 INFO L225 Difference]: With dead ends: 94 [2022-02-24 03:47:11,100 INFO L226 Difference]: Without dead ends: 87 [2022-02-24 03:47:11,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=435, Invalid=21027, Unknown=0, NotChecked=0, Total=21462 [2022-02-24 03:47:11,102 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 5833 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 5906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 5833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:11,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 376 Invalid, 5906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 5833 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-24 03:47:11,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-24 03:47:11,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-02-24 03:47:11,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:11,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2022-02-24 03:47:11,106 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2022-02-24 03:47:11,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:11,106 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2022-02-24 03:47:11,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2022-02-24 03:47:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 03:47:11,106 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:11,106 INFO L514 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:11,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 03:47:11,107 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:11,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:11,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1438535695, now seen corresponding path program 72 times [2022-02-24 03:47:11,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:11,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85397443] [2022-02-24 03:47:11,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:11,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:11,308 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:47:11,308 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:47:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:14,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:14,115 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:14,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85397443] [2022-02-24 03:47:14,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [85397443] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:14,115 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:14,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-24 03:47:14,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601208774] [2022-02-24 03:47:14,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:14,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-24 03:47:14,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:14,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-24 03:47:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 03:47:14,116 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 76 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 75 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:19,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:19,581 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-02-24 03:47:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-24 03:47:19,582 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 75 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-24 03:47:19,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:19,582 INFO L225 Difference]: With dead ends: 95 [2022-02-24 03:47:19,582 INFO L226 Difference]: Without dead ends: 88 [2022-02-24 03:47:19,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=441, Invalid=21611, Unknown=0, NotChecked=0, Total=22052 [2022-02-24 03:47:19,583 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 5987 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 6061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 5987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:19,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 381 Invalid, 6061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 5987 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-24 03:47:19,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-24 03:47:19,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-02-24 03:47:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 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) [2022-02-24 03:47:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2022-02-24 03:47:19,588 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2022-02-24 03:47:19,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:19,588 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2022-02-24 03:47:19,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 75 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:19,588 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2022-02-24 03:47:19,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-24 03:47:19,588 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:19,588 INFO L514 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:19,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 03:47:19,589 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:19,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:19,589 INFO L85 PathProgramCache]: Analyzing trace with hash 587465022, now seen corresponding path program 73 times [2022-02-24 03:47:19,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:19,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081038573] [2022-02-24 03:47:19,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:19,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:19,788 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:47:19,788 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:47:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:22,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:22,159 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:22,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081038573] [2022-02-24 03:47:22,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1081038573] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:22,160 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:22,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-24 03:47:22,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915884952] [2022-02-24 03:47:22,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:22,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-24 03:47:22,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:22,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-24 03:47:22,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 03:47:22,161 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:26,857 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-02-24 03:47:26,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-24 03:47:26,857 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have 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 [2022-02-24 03:47:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:26,858 INFO L225 Difference]: With dead ends: 96 [2022-02-24 03:47:26,858 INFO L226 Difference]: Without dead ends: 89 [2022-02-24 03:47:26,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=447, Invalid=22203, Unknown=0, NotChecked=0, Total=22650 [2022-02-24 03:47:26,860 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 6143 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 6218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 6143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:26,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 386 Invalid, 6218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 6143 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 03:47:26,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-24 03:47:26,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-02-24 03:47:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-02-24 03:47:26,865 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2022-02-24 03:47:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:26,865 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-02-24 03:47:26,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:26,865 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-02-24 03:47:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-24 03:47:26,865 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:26,865 INFO L514 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:26,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 03:47:26,865 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:26,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:26,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1031022191, now seen corresponding path program 74 times [2022-02-24 03:47:26,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:26,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132853843] [2022-02-24 03:47:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:26,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:27,052 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:47:27,052 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:47:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:29,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:29,839 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:29,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132853843] [2022-02-24 03:47:29,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2132853843] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:29,840 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:29,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-02-24 03:47:29,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56686496] [2022-02-24 03:47:29,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:29,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-24 03:47:29,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:29,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-24 03:47:29,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 03:47:29,841 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 78 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 77 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:35,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:35,409 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2022-02-24 03:47:35,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-24 03:47:35,410 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 77 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-02-24 03:47:35,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:35,410 INFO L225 Difference]: With dead ends: 97 [2022-02-24 03:47:35,410 INFO L226 Difference]: Without dead ends: 90 [2022-02-24 03:47:35,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2775 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=453, Invalid=22803, Unknown=0, NotChecked=0, Total=23256 [2022-02-24 03:47:35,411 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 6301 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 6377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 6301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:35,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 391 Invalid, 6377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 6301 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 03:47:35,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-24 03:47:35,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-02-24 03:47:35,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2022-02-24 03:47:35,417 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2022-02-24 03:47:35,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:35,418 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2022-02-24 03:47:35,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 77 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:35,418 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2022-02-24 03:47:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 03:47:35,418 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:35,418 INFO L514 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:35,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 03:47:35,419 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:35,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:35,419 INFO L85 PathProgramCache]: Analyzing trace with hash 335481758, now seen corresponding path program 75 times [2022-02-24 03:47:35,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:35,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474497691] [2022-02-24 03:47:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:35,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:35,618 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:47:35,618 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:47:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:40,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:40,184 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:40,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474497691] [2022-02-24 03:47:40,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [474497691] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:40,185 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:40,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-24 03:47:40,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898955565] [2022-02-24 03:47:40,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:40,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-24 03:47:40,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:40,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-24 03:47:40,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 03:47:40,186 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:14,141 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-02-24 03:49:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-24 03:49:14,141 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have 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 [2022-02-24 03:49:14,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:14,142 INFO L225 Difference]: With dead ends: 98 [2022-02-24 03:49:14,142 INFO L226 Difference]: Without dead ends: 91 [2022-02-24 03:49:14,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 95.8s TimeCoverageRelationStatistics Valid=609, Invalid=23261, Unknown=0, NotChecked=0, Total=23870 [2022-02-24 03:49:14,143 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 6311 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 6463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 6311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:14,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 395 Invalid, 6463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 6311 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 03:49:14,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-24 03:49:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-02-24 03:49:14,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 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) [2022-02-24 03:49:14,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-02-24 03:49:14,150 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2022-02-24 03:49:14,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:14,150 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-02-24 03:49:14,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:14,151 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-02-24 03:49:14,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-24 03:49:14,151 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:14,151 INFO L514 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:14,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 03:49:14,151 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:14,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:14,152 INFO L85 PathProgramCache]: Analyzing trace with hash -252568783, now seen corresponding path program 76 times [2022-02-24 03:49:14,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:14,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282785524] [2022-02-24 03:49:14,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:14,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:14,345 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:49:14,346 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:49:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:19,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:19,606 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:19,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282785524] [2022-02-24 03:49:19,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1282785524] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:19,606 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:19,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-24 03:49:19,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840880383] [2022-02-24 03:49:19,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:19,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-24 03:49:19,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:19,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-24 03:49:19,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2022-02-24 03:49:19,607 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 80 states, 80 states have (on average 1.075) internal successors, (86), 79 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:23,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:23,477 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2022-02-24 03:51:23,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-24 03:51:23,477 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.075) internal successors, (86), 79 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-02-24 03:51:23,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:23,478 INFO L225 Difference]: With dead ends: 99 [2022-02-24 03:51:23,478 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 03:51:23,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 126.2s TimeCoverageRelationStatistics Valid=617, Invalid=23875, Unknown=0, NotChecked=0, Total=24492 [2022-02-24 03:51:23,479 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 6471 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 6625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 6471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:23,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 400 Invalid, 6625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 6471 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-24 03:51:23,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 03:51:23,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-02-24 03:51:23,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2022-02-24 03:51:23,486 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2022-02-24 03:51:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:23,486 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2022-02-24 03:51:23,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.075) internal successors, (86), 79 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:23,486 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2022-02-24 03:51:23,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-24 03:51:23,487 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:23,487 INFO L514 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:23,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 03:51:23,487 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:23,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:23,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1302266370, now seen corresponding path program 77 times [2022-02-24 03:51:23,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:23,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432632381] [2022-02-24 03:51:23,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:23,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:23,748 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:51:23,748 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:51:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:26,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:51:26,401 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:26,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432632381] [2022-02-24 03:51:26,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1432632381] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:26,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:26,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-02-24 03:51:26,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531256221] [2022-02-24 03:51:26,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:26,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-24 03:51:26,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:26,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-24 03:51:26,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 03:51:26,403 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 81 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 80 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:31,682 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-02-24 03:51:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-24 03:51:31,683 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 80 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have 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 [2022-02-24 03:51:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:31,683 INFO L225 Difference]: With dead ends: 100 [2022-02-24 03:51:31,683 INFO L226 Difference]: Without dead ends: 93 [2022-02-24 03:51:31,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=471, Invalid=24651, Unknown=0, NotChecked=0, Total=25122 [2022-02-24 03:51:31,685 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 6787 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 6866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 6787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:31,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 406 Invalid, 6866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 6787 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-24 03:51:31,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-24 03:51:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-02-24 03:51:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-02-24 03:51:31,690 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2022-02-24 03:51:31,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:31,690 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-02-24 03:51:31,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 80 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:31,690 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-02-24 03:51:31,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-24 03:51:31,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:31,691 INFO L514 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:31,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 03:51:31,691 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:31,691 INFO L85 PathProgramCache]: Analyzing trace with hash 516846801, now seen corresponding path program 78 times [2022-02-24 03:51:31,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:31,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279357246] [2022-02-24 03:51:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:31,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:31,912 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:51:31,913 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:51:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:38,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:51:38,226 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:38,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279357246] [2022-02-24 03:51:38,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [279357246] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:38,226 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:38,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-02-24 03:51:38,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008317724] [2022-02-24 03:51:38,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:38,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-24 03:51:38,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:38,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-24 03:51:38,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 03:51:38,227 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 81 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:21,788 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2022-02-24 03:54:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-24 03:54:21,789 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 81 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-24 03:54:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:21,789 INFO L225 Difference]: With dead ends: 101 [2022-02-24 03:54:21,789 INFO L226 Difference]: Without dead ends: 94 [2022-02-24 03:54:21,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 166.8s TimeCoverageRelationStatistics Valid=633, Invalid=25127, Unknown=0, NotChecked=0, Total=25760 [2022-02-24 03:54:21,790 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 6797 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 6955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 6797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:21,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 410 Invalid, 6955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 6797 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-24 03:54:21,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-24 03:54:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-02-24 03:54:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-02-24 03:54:21,795 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2022-02-24 03:54:21,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:21,795 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-02-24 03:54:21,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 81 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-02-24 03:54:21,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 03:54:21,795 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:21,795 INFO L514 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:21,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-24 03:54:21,796 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:21,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:21,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1074780254, now seen corresponding path program 79 times [2022-02-24 03:54:21,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:21,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592294610] [2022-02-24 03:54:21,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:21,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:21,996 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:54:21,996 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:54:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:24,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:54:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:54:24,805 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:24,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592294610] [2022-02-24 03:54:24,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592294610] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:24,805 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:24,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-24 03:54:24,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551143882] [2022-02-24 03:54:24,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:24,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-24 03:54:24,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:24,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-24 03:54:24,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2022-02-24 03:54:24,807 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:30,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:30,396 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-02-24 03:54:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-24 03:54:30,397 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have 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 [2022-02-24 03:54:30,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:30,397 INFO L225 Difference]: With dead ends: 102 [2022-02-24 03:54:30,397 INFO L226 Difference]: Without dead ends: 95 [2022-02-24 03:54:30,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=483, Invalid=25923, Unknown=0, NotChecked=0, Total=26406 [2022-02-24 03:54:30,399 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 7121 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 7202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 7121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:30,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 416 Invalid, 7202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 7121 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 03:54:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-02-24 03:54:30,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-02-24 03:54:30,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:30,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-02-24 03:54:30,405 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2022-02-24 03:54:30,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:30,405 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-02-24 03:54:30,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:30,405 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-02-24 03:54:30,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-24 03:54:30,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:30,406 INFO L514 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:30,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-24 03:54:30,406 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:30,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:30,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1190848113, now seen corresponding path program 80 times [2022-02-24 03:54:30,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:30,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853680859] [2022-02-24 03:54:30,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:30,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:30,609 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-02-24 03:54:30,609 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:54:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat