/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 02:47:09,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 02:47:09,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 02:47:09,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 02:47:09,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 02:47:09,847 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 02:47:09,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 02:47:09,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 02:47:09,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 02:47:09,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 02:47:09,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 02:47:09,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 02:47:09,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 02:47:09,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 02:47:09,849 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 02:47:09,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 02:47:09,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 02:47:09,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 02:47:09,850 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 02:47:09,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 02:47:09,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:47:09,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 02:47:09,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 02:47:09,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 02:47:09,851 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 02:47:09,851 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 02:47:10,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 02:47:10,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 02:47:10,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 02:47:10,079 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 02:47:10,079 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 02:47:10,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-02-24 02:47:10,141 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3af4094e/60132d73a4bd4059ade386e867f51709/FLAG469b746e2 [2022-02-24 02:47:10,507 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 02:47:10,508 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-02-24 02:47:10,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3af4094e/60132d73a4bd4059ade386e867f51709/FLAG469b746e2 [2022-02-24 02:47:10,522 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3af4094e/60132d73a4bd4059ade386e867f51709 [2022-02-24 02:47:10,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 02:47:10,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 02:47:10,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 02:47:10,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 02:47:10,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 02:47:10,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:47:10" (1/1) ... [2022-02-24 02:47:10,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77cf7e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:10, skipping insertion in model container [2022-02-24 02:47:10,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:47:10" (1/1) ... [2022-02-24 02:47:10,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 02:47:10,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 02:47:10,670 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-02-24 02:47:10,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:47:10,698 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 02:47:10,708 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-02-24 02:47:10,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:47:10,725 INFO L208 MainTranslator]: Completed translation [2022-02-24 02:47:10,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:10 WrapperNode [2022-02-24 02:47:10,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 02:47:10,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 02:47:10,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 02:47:10,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 02:47:10,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:10" (1/1) ... [2022-02-24 02:47:10,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:10" (1/1) ... [2022-02-24 02:47:10,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:10" (1/1) ... [2022-02-24 02:47:10,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:10" (1/1) ... [2022-02-24 02:47:10,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:10" (1/1) ... [2022-02-24 02:47:10,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:10" (1/1) ... [2022-02-24 02:47:10,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:10" (1/1) ... [2022-02-24 02:47:10,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 02:47:10,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 02:47:10,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 02:47:10,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 02:47:10,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:10" (1/1) ... [2022-02-24 02:47:10,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:47:10,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 02:47:10,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 02:47:10,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 02:47:10,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 02:47:10,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 02:47:10,804 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 02:47:10,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 02:47:10,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 02:47:10,804 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 02:47:10,804 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 02:47:10,804 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 02:47:10,804 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 02:47:10,804 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 02:47:10,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 02:47:10,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 02:47:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-24 02:47:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 02:47:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-24 02:47:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 02:47:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 02:47:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 02:47:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 02:47:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 02:47:10,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 02:47:10,853 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 02:47:10,854 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 02:47:10,968 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 02:47:10,973 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 02:47:10,973 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-02-24 02:47:10,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:47:10 BoogieIcfgContainer [2022-02-24 02:47:10,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 02:47:10,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 02:47:10,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 02:47:10,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 02:47:10,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 02:47:10" (1/3) ... [2022-02-24 02:47:10,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f3da8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:47:10, skipping insertion in model container [2022-02-24 02:47:10,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:10" (2/3) ... [2022-02-24 02:47:10,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f3da8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:47:10, skipping insertion in model container [2022-02-24 02:47:10,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:47:10" (3/3) ... [2022-02-24 02:47:10,981 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2022-02-24 02:47:11,000 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 02:47:11,000 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 02:47:11,054 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 02:47:11,059 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-24 02:47:11,059 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 02:47:11,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:47:11,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 02:47:11,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:11,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:11,093 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:11,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:11,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 1 times [2022-02-24 02:47:11,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:11,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060331415] [2022-02-24 02:47:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:11,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:11,163 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:47:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:11,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:11,319 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:11,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060331415] [2022-02-24 02:47:11,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2060331415] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:11,322 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:11,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 02:47:11,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834367797] [2022-02-24 02:47:11,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:11,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 02:47:11,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:11,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 02:47:11,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 02:47:11,355 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:11,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:11,408 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2022-02-24 02:47:11,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 02:47:11,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 02:47:11,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:11,420 INFO L225 Difference]: With dead ends: 64 [2022-02-24 02:47:11,421 INFO L226 Difference]: Without dead ends: 29 [2022-02-24 02:47:11,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 02:47:11,427 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:11,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:47:11,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-24 02:47:11,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-24 02:47:11,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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 02:47:11,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-02-24 02:47:11,465 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-02-24 02:47:11,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:11,465 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-02-24 02:47:11,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-02-24 02:47:11,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 02:47:11,467 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:11,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:11,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 02:47:11,468 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:11,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 1 times [2022-02-24 02:47:11,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:11,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202780608] [2022-02-24 02:47:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:11,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:11,475 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:47:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:11,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:11,589 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:11,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202780608] [2022-02-24 02:47:11,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [202780608] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:11,589 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:11,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 02:47:11,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167529104] [2022-02-24 02:47:11,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:11,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 02:47:11,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:11,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 02:47:11,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 02:47:11,591 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 02:47:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:11,694 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-02-24 02:47:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 02:47:11,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 02:47:11,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:11,696 INFO L225 Difference]: With dead ends: 65 [2022-02-24 02:47:11,697 INFO L226 Difference]: Without dead ends: 44 [2022-02-24 02:47:11,697 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 02:47:11,698 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:11,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 34 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:11,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-24 02:47:11,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-02-24 02:47:11,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-02-24 02:47:11,705 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-02-24 02:47:11,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:11,705 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-02-24 02:47:11,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 02:47:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-02-24 02:47:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-24 02:47:11,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:11,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:11,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 02:47:11,706 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:11,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:11,706 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 1 times [2022-02-24 02:47:11,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:11,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667612440] [2022-02-24 02:47:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:11,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:11,718 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:11,719 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:11,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:11,795 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 02:47:11,795 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:11,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667612440] [2022-02-24 02:47:11,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1667612440] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:11,795 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:11,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 02:47:11,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298140153] [2022-02-24 02:47:11,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:11,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 02:47:11,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:11,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 02:47:11,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:47:11,797 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 02:47:11,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:11,939 INFO L93 Difference]: Finished difference Result 80 states and 106 transitions. [2022-02-24 02:47:11,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 02:47:11,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 02:47:11,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:11,941 INFO L225 Difference]: With dead ends: 80 [2022-02-24 02:47:11,941 INFO L226 Difference]: Without dead ends: 59 [2022-02-24 02:47:11,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:47:11,942 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:11,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 39 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:11,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-24 02:47:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2022-02-24 02:47:11,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 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 02:47:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-02-24 02:47:11,950 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 21 [2022-02-24 02:47:11,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:11,950 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-02-24 02:47:11,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 02:47:11,951 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-02-24 02:47:11,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 02:47:11,951 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:11,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:11,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 02:47:11,952 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:11,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:11,952 INFO L85 PathProgramCache]: Analyzing trace with hash -671441351, now seen corresponding path program 2 times [2022-02-24 02:47:11,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:11,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118874541] [2022-02-24 02:47:11,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:11,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:11,960 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:11,960 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:12,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:12,068 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:12,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118874541] [2022-02-24 02:47:12,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2118874541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:12,068 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:12,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 02:47:12,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569111219] [2022-02-24 02:47:12,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:12,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 02:47:12,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:12,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 02:47:12,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 02:47:12,070 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:12,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:12,246 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2022-02-24 02:47:12,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 02:47:12,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-24 02:47:12,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:12,252 INFO L225 Difference]: With dead ends: 95 [2022-02-24 02:47:12,252 INFO L226 Difference]: Without dead ends: 74 [2022-02-24 02:47:12,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:47:12,255 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:12,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 46 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:12,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-24 02:47:12,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 34. [2022-02-24 02:47:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-02-24 02:47:12,268 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2022-02-24 02:47:12,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:12,269 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-02-24 02:47:12,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:12,269 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-02-24 02:47:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 02:47:12,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:12,269 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:12,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 02:47:12,270 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:12,270 INFO L85 PathProgramCache]: Analyzing trace with hash -864301033, now seen corresponding path program 3 times [2022-02-24 02:47:12,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:12,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395190481] [2022-02-24 02:47:12,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:12,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:12,273 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:12,273 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:12,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:12,359 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:12,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395190481] [2022-02-24 02:47:12,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [395190481] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:12,359 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:12,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:47:12,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772063267] [2022-02-24 02:47:12,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:12,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:47:12,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:12,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:47:12,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:47:12,361 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:12,574 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2022-02-24 02:47:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:47:12,574 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 02:47:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:12,575 INFO L225 Difference]: With dead ends: 110 [2022-02-24 02:47:12,575 INFO L226 Difference]: Without dead ends: 89 [2022-02-24 02:47:12,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:47:12,576 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 162 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:12,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 73 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-24 02:47:12,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 36. [2022-02-24 02:47:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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 02:47:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-02-24 02:47:12,585 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2022-02-24 02:47:12,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:12,585 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-02-24 02:47:12,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:12,585 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-02-24 02:47:12,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 02:47:12,586 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:12,586 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:12,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 02:47:12,586 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:12,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:12,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1518861707, now seen corresponding path program 4 times [2022-02-24 02:47:12,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:12,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32124651] [2022-02-24 02:47:12,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:12,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:12,589 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:12,589 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:12,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:12,667 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:12,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32124651] [2022-02-24 02:47:12,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [32124651] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:12,667 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:12,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 02:47:12,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180293382] [2022-02-24 02:47:12,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:12,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 02:47:12,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:12,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 02:47:12,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:47:12,669 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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 02:47:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:12,937 INFO L93 Difference]: Finished difference Result 125 states and 169 transitions. [2022-02-24 02:47:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 02:47:12,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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 02:47:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:12,938 INFO L225 Difference]: With dead ends: 125 [2022-02-24 02:47:12,938 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 02:47:12,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:47:12,939 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 240 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:12,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 75 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:12,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 02:47:12,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 38. [2022-02-24 02:47:12,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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 02:47:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-02-24 02:47:12,947 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 27 [2022-02-24 02:47:12,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:12,948 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-02-24 02:47:12,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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 02:47:12,948 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-02-24 02:47:12,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 02:47:12,948 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:12,948 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:12,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 02:47:12,949 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:12,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:12,949 INFO L85 PathProgramCache]: Analyzing trace with hash 808523091, now seen corresponding path program 5 times [2022-02-24 02:47:12,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:12,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871902108] [2022-02-24 02:47:12,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:12,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:12,952 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:12,952 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:13,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:13,036 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:13,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871902108] [2022-02-24 02:47:13,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [871902108] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:13,036 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:13,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:47:13,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731284735] [2022-02-24 02:47:13,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:13,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:47:13,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:13,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:47:13,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:47:13,037 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 02:47:13,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:13,379 INFO L93 Difference]: Finished difference Result 140 states and 190 transitions. [2022-02-24 02:47:13,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:47:13,379 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 02:47:13,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:13,380 INFO L225 Difference]: With dead ends: 140 [2022-02-24 02:47:13,380 INFO L226 Difference]: Without dead ends: 119 [2022-02-24 02:47:13,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:47:13,381 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 228 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:13,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 107 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:13,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-24 02:47:13,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 40. [2022-02-24 02:47:13,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 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 02:47:13,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-02-24 02:47:13,391 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 29 [2022-02-24 02:47:13,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:13,392 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-02-24 02:47:13,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 02:47:13,392 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-02-24 02:47:13,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 02:47:13,392 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:13,392 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:13,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 02:47:13,393 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:13,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:13,393 INFO L85 PathProgramCache]: Analyzing trace with hash -252647247, now seen corresponding path program 6 times [2022-02-24 02:47:13,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:13,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099777705] [2022-02-24 02:47:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:13,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:13,396 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:13,396 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:13,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:13,506 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:13,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099777705] [2022-02-24 02:47:13,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2099777705] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:13,507 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:13,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:47:13,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491896768] [2022-02-24 02:47:13,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:13,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:47:13,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:13,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:47:13,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:47:13,510 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:13,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:13,939 INFO L93 Difference]: Finished difference Result 155 states and 211 transitions. [2022-02-24 02:47:13,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 02:47:13,940 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 02:47:13,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:13,942 INFO L225 Difference]: With dead ends: 155 [2022-02-24 02:47:13,942 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 02:47:13,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:47:13,958 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 321 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:13,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 104 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:13,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 02:47:13,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2022-02-24 02:47:13,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 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 02:47:13,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-02-24 02:47:13,967 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 31 [2022-02-24 02:47:13,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:13,967 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-02-24 02:47:13,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:13,967 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-02-24 02:47:13,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 02:47:13,967 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:13,968 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:13,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 02:47:13,968 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:13,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:13,968 INFO L85 PathProgramCache]: Analyzing trace with hash -2130092913, now seen corresponding path program 7 times [2022-02-24 02:47:13,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:13,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232514527] [2022-02-24 02:47:13,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:13,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:13,971 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:13,971 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:14,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:14,064 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:14,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232514527] [2022-02-24 02:47:14,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [232514527] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:14,064 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:14,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:47:14,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209088240] [2022-02-24 02:47:14,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:14,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:47:14,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:14,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:47:14,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:47:14,066 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:14,588 INFO L93 Difference]: Finished difference Result 170 states and 232 transitions. [2022-02-24 02:47:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:47:14,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 02:47:14,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:14,589 INFO L225 Difference]: With dead ends: 170 [2022-02-24 02:47:14,589 INFO L226 Difference]: Without dead ends: 149 [2022-02-24 02:47:14,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:47:14,590 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 369 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:14,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 116 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:47:14,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-24 02:47:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 44. [2022-02-24 02:47:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 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 02:47:14,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-02-24 02:47:14,602 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2022-02-24 02:47:14,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:14,603 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-02-24 02:47:14,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:14,605 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-02-24 02:47:14,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 02:47:14,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:14,608 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:14,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 02:47:14,608 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:14,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:14,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1825853677, now seen corresponding path program 8 times [2022-02-24 02:47:14,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:14,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582717948] [2022-02-24 02:47:14,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:14,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:14,614 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:14,614 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:14,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:14,753 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:14,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582717948] [2022-02-24 02:47:14,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [582717948] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:14,753 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:14,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:47:14,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423314707] [2022-02-24 02:47:14,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:14,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:47:14,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:14,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:47:14,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:47:14,754 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:15,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:15,452 INFO L93 Difference]: Finished difference Result 185 states and 253 transitions. [2022-02-24 02:47:15,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:47:15,452 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 02:47:15,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:15,453 INFO L225 Difference]: With dead ends: 185 [2022-02-24 02:47:15,453 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 02:47:15,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:47:15,454 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 327 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:15,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 158 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:47:15,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 02:47:15,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 46. [2022-02-24 02:47:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 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 02:47:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-02-24 02:47:15,463 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 35 [2022-02-24 02:47:15,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:15,463 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-02-24 02:47:15,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:15,463 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-02-24 02:47:15,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 02:47:15,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:15,464 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:15,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 02:47:15,464 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:15,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1850497589, now seen corresponding path program 9 times [2022-02-24 02:47:15,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:15,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539462209] [2022-02-24 02:47:15,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:15,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:15,467 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:15,467 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:15,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:15,580 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:15,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539462209] [2022-02-24 02:47:15,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1539462209] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:15,581 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:15,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:47:15,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226145159] [2022-02-24 02:47:15,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:15,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:47:15,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:15,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:47:15,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:47:15,582 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 02:47:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:16,421 INFO L93 Difference]: Finished difference Result 200 states and 274 transitions. [2022-02-24 02:47:16,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:47:16,422 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 02:47:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:16,423 INFO L225 Difference]: With dead ends: 200 [2022-02-24 02:47:16,423 INFO L226 Difference]: Without dead ends: 179 [2022-02-24 02:47:16,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:47:16,424 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 360 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:16,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 175 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:47:16,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-24 02:47:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 48. [2022-02-24 02:47:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 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 02:47:16,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-02-24 02:47:16,434 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2022-02-24 02:47:16,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:16,434 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-02-24 02:47:16,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 02:47:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-02-24 02:47:16,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 02:47:16,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:16,435 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:16,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 02:47:16,435 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:16,435 INFO L85 PathProgramCache]: Analyzing trace with hash -65979607, now seen corresponding path program 10 times [2022-02-24 02:47:16,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:16,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732590386] [2022-02-24 02:47:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:16,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:16,438 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:16,438 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:16,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:16,494 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:16,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732590386] [2022-02-24 02:47:16,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [732590386] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:16,494 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:16,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:47:16,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162852965] [2022-02-24 02:47:16,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:16,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:47:16,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:16,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:47:16,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:47:16,495 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 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 02:47:16,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:16,603 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2022-02-24 02:47:16,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:47:16,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 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 39 [2022-02-24 02:47:16,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:16,604 INFO L225 Difference]: With dead ends: 72 [2022-02-24 02:47:16,604 INFO L226 Difference]: Without dead ends: 67 [2022-02-24 02:47:16,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:47:16,605 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:16,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 52 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:16,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-24 02:47:16,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-02-24 02:47:16,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 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 02:47:16,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-02-24 02:47:16,623 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 39 [2022-02-24 02:47:16,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:16,624 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-02-24 02:47:16,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 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 02:47:16,624 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-02-24 02:47:16,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 02:47:16,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:16,624 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:16,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 02:47:16,625 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:16,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:16,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2124486910, now seen corresponding path program 1 times [2022-02-24 02:47:16,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:16,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225420490] [2022-02-24 02:47:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:16,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:16,627 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:16,627 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:16,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:16,681 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:16,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225420490] [2022-02-24 02:47:16,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1225420490] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:16,681 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:16,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 02:47:16,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926693630] [2022-02-24 02:47:16,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:16,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 02:47:16,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:16,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 02:47:16,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:47:16,682 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 02:47:16,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:16,771 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2022-02-24 02:47:16,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 02:47:16,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 45 [2022-02-24 02:47:16,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:16,773 INFO L225 Difference]: With dead ends: 113 [2022-02-24 02:47:16,773 INFO L226 Difference]: Without dead ends: 84 [2022-02-24 02:47:16,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:47:16,776 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:16,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 44 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:47:16,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-24 02:47:16,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-02-24 02:47:16,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 71 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 02:47:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-02-24 02:47:16,801 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 45 [2022-02-24 02:47:16,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:16,807 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-02-24 02:47:16,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 02:47:16,807 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-02-24 02:47:16,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 02:47:16,808 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:16,808 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:16,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 02:47:16,808 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:16,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:16,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1273709643, now seen corresponding path program 2 times [2022-02-24 02:47:16,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:16,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372524468] [2022-02-24 02:47:16,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:16,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:16,811 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:16,811 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:16,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:16,855 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:16,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372524468] [2022-02-24 02:47:16,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1372524468] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:16,855 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:16,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 02:47:16,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644844999] [2022-02-24 02:47:16,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:16,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 02:47:16,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:16,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 02:47:16,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 02:47:16,856 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 02:47:16,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:16,964 INFO L93 Difference]: Finished difference Result 141 states and 183 transitions. [2022-02-24 02:47:16,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 02:47:16,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 48 [2022-02-24 02:47:16,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:16,965 INFO L225 Difference]: With dead ends: 141 [2022-02-24 02:47:16,966 INFO L226 Difference]: Without dead ends: 96 [2022-02-24 02:47:16,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:47:16,966 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 70 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:16,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 48 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:47:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-24 02:47:17,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2022-02-24 02:47:17,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 83 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-02-24 02:47:17,002 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 48 [2022-02-24 02:47:17,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:17,003 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-02-24 02:47:17,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 02:47:17,003 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-02-24 02:47:17,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 02:47:17,003 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:17,003 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:17,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 02:47:17,004 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:17,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:17,004 INFO L85 PathProgramCache]: Analyzing trace with hash -370162142, now seen corresponding path program 3 times [2022-02-24 02:47:17,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:17,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948468798] [2022-02-24 02:47:17,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:17,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:17,008 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:17,008 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:17,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:17,105 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:17,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948468798] [2022-02-24 02:47:17,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1948468798] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:17,105 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:17,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:47:17,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489156480] [2022-02-24 02:47:17,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:17,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:47:17,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:17,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:47:17,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:47:17,106 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:17,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:17,257 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2022-02-24 02:47:17,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:47:17,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 51 [2022-02-24 02:47:17,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:17,258 INFO L225 Difference]: With dead ends: 165 [2022-02-24 02:47:17,258 INFO L226 Difference]: Without dead ends: 108 [2022-02-24 02:47:17,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:47:17,259 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:17,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 52 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:17,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-24 02:47:17,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-02-24 02:47:17,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.263157894736842) internal successors, (120), 95 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-02-24 02:47:17,292 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 51 [2022-02-24 02:47:17,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:17,292 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-02-24 02:47:17,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:17,292 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-02-24 02:47:17,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 02:47:17,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:17,293 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:17,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 02:47:17,293 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:17,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:17,293 INFO L85 PathProgramCache]: Analyzing trace with hash 653396117, now seen corresponding path program 4 times [2022-02-24 02:47:17,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:17,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723354707] [2022-02-24 02:47:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:17,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:17,296 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:17,296 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:17,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:17,357 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:17,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723354707] [2022-02-24 02:47:17,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [723354707] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:17,357 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:17,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 02:47:17,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872939566] [2022-02-24 02:47:17,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:17,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 02:47:17,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:17,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 02:47:17,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:47:17,358 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:17,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:17,519 INFO L93 Difference]: Finished difference Result 189 states and 247 transitions. [2022-02-24 02:47:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 02:47:17,519 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 02:47:17,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:17,519 INFO L225 Difference]: With dead ends: 189 [2022-02-24 02:47:17,520 INFO L226 Difference]: Without dead ends: 120 [2022-02-24 02:47:17,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:47:17,520 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 106 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:17,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 51 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-24 02:47:17,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2022-02-24 02:47:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.2710280373831775) internal successors, (136), 107 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 140 transitions. [2022-02-24 02:47:17,556 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 140 transitions. Word has length 54 [2022-02-24 02:47:17,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:17,556 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 140 transitions. [2022-02-24 02:47:17,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:17,556 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 140 transitions. [2022-02-24 02:47:17,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 02:47:17,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:17,557 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:17,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 02:47:17,557 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:17,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:17,557 INFO L85 PathProgramCache]: Analyzing trace with hash -790311614, now seen corresponding path program 5 times [2022-02-24 02:47:17,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:17,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788950773] [2022-02-24 02:47:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:17,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:17,559 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:17,559 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:17,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:17,625 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:17,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788950773] [2022-02-24 02:47:17,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1788950773] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:17,625 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:17,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:47:17,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905074647] [2022-02-24 02:47:17,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:17,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:47:17,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:17,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:47:17,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:47:17,626 INFO L87 Difference]: Start difference. First operand 112 states and 140 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:17,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:17,818 INFO L93 Difference]: Finished difference Result 213 states and 279 transitions. [2022-02-24 02:47:17,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:47:17,818 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-02-24 02:47:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:17,819 INFO L225 Difference]: With dead ends: 213 [2022-02-24 02:47:17,819 INFO L226 Difference]: Without dead ends: 132 [2022-02-24 02:47:17,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:47:17,819 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 118 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:17,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 60 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:17,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-24 02:47:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-02-24 02:47:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.2773109243697478) internal successors, (152), 119 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 156 transitions. [2022-02-24 02:47:17,871 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 156 transitions. Word has length 57 [2022-02-24 02:47:17,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:17,871 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 156 transitions. [2022-02-24 02:47:17,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:17,871 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 156 transitions. [2022-02-24 02:47:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 02:47:17,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:17,872 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:17,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 02:47:17,872 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:17,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:17,872 INFO L85 PathProgramCache]: Analyzing trace with hash -484823691, now seen corresponding path program 6 times [2022-02-24 02:47:17,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:17,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327203665] [2022-02-24 02:47:17,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:17,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:17,875 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:17,875 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:17,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:17,967 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:17,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327203665] [2022-02-24 02:47:17,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [327203665] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:17,967 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:17,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:47:17,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064514787] [2022-02-24 02:47:17,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:17,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:47:17,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:17,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:47:17,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:47:17,968 INFO L87 Difference]: Start difference. First operand 124 states and 156 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:18,274 INFO L93 Difference]: Finished difference Result 237 states and 311 transitions. [2022-02-24 02:47:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 02:47:18,274 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 02:47:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:18,275 INFO L225 Difference]: With dead ends: 237 [2022-02-24 02:47:18,275 INFO L226 Difference]: Without dead ends: 144 [2022-02-24 02:47:18,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:47:18,276 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 122 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:18,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 79 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-24 02:47:18,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2022-02-24 02:47:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.282442748091603) internal successors, (168), 131 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 172 transitions. [2022-02-24 02:47:18,320 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 172 transitions. Word has length 60 [2022-02-24 02:47:18,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:18,321 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 172 transitions. [2022-02-24 02:47:18,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:18,321 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 172 transitions. [2022-02-24 02:47:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 02:47:18,321 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:18,321 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:18,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 02:47:18,321 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:18,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:18,322 INFO L85 PathProgramCache]: Analyzing trace with hash -729809822, now seen corresponding path program 7 times [2022-02-24 02:47:18,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:18,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609802797] [2022-02-24 02:47:18,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:18,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:18,324 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:18,324 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:18,421 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:18,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609802797] [2022-02-24 02:47:18,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [609802797] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:18,421 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:18,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:47:18,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704665083] [2022-02-24 02:47:18,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:18,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:47:18,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:18,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:47:18,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:47:18,422 INFO L87 Difference]: Start difference. First operand 136 states and 172 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:18,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:18,791 INFO L93 Difference]: Finished difference Result 261 states and 343 transitions. [2022-02-24 02:47:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:47:18,791 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-24 02:47:18,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:18,792 INFO L225 Difference]: With dead ends: 261 [2022-02-24 02:47:18,792 INFO L226 Difference]: Without dead ends: 156 [2022-02-24 02:47:18,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:47:18,793 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 126 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:18,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 98 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:18,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-24 02:47:18,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2022-02-24 02:47:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.2867132867132867) internal successors, (184), 143 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 188 transitions. [2022-02-24 02:47:18,843 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 188 transitions. Word has length 63 [2022-02-24 02:47:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:18,844 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 188 transitions. [2022-02-24 02:47:18,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 188 transitions. [2022-02-24 02:47:18,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 02:47:18,844 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:18,844 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:18,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 02:47:18,845 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:18,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:18,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1962202539, now seen corresponding path program 8 times [2022-02-24 02:47:18,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:18,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197451692] [2022-02-24 02:47:18,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:18,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:18,847 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:18,847 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:18,911 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:18,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197451692] [2022-02-24 02:47:18,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1197451692] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:18,911 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:18,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 02:47:18,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175174736] [2022-02-24 02:47:18,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:18,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 02:47:18,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:18,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 02:47:18,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:47:18,912 INFO L87 Difference]: Start difference. First operand 148 states and 188 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 02:47:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:19,089 INFO L93 Difference]: Finished difference Result 379 states and 495 transitions. [2022-02-24 02:47:19,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 02:47:19,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 66 [2022-02-24 02:47:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:19,090 INFO L225 Difference]: With dead ends: 379 [2022-02-24 02:47:19,090 INFO L226 Difference]: Without dead ends: 262 [2022-02-24 02:47:19,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:47:19,091 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 61 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:19,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 42 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:47:19,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-02-24 02:47:19,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 152. [2022-02-24 02:47:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.2857142857142858) internal successors, (189), 147 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:19,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 193 transitions. [2022-02-24 02:47:19,147 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 193 transitions. Word has length 66 [2022-02-24 02:47:19,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:19,147 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 193 transitions. [2022-02-24 02:47:19,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 02:47:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 193 transitions. [2022-02-24 02:47:19,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 02:47:19,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:19,148 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:19,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 02:47:19,148 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:19,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:19,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1992147995, now seen corresponding path program 1 times [2022-02-24 02:47:19,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:19,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396553477] [2022-02-24 02:47:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:19,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:19,150 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:19,151 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:19,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:19,257 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:19,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396553477] [2022-02-24 02:47:19,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1396553477] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:19,258 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:19,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:47:19,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458975175] [2022-02-24 02:47:19,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:19,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:47:19,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:19,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:47:19,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:47:19,258 INFO L87 Difference]: Start difference. First operand 152 states and 193 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 02:47:19,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:19,646 INFO L93 Difference]: Finished difference Result 244 states and 318 transitions. [2022-02-24 02:47:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:47:19,651 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-02-24 02:47:19,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:19,652 INFO L225 Difference]: With dead ends: 244 [2022-02-24 02:47:19,652 INFO L226 Difference]: Without dead ends: 183 [2022-02-24 02:47:19,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:47:19,653 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 175 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:19,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 76 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-24 02:47:19,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-02-24 02:47:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.2875816993464053) internal successors, (197), 153 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 201 transitions. [2022-02-24 02:47:19,729 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 201 transitions. Word has length 67 [2022-02-24 02:47:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:19,729 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 201 transitions. [2022-02-24 02:47:19,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 02:47:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 201 transitions. [2022-02-24 02:47:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:19,729 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:19,730 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:19,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 02:47:19,730 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:19,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 1 times [2022-02-24 02:47:19,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:19,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774691069] [2022-02-24 02:47:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:19,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:19,732 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:19,732 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:20,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:20,068 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:20,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774691069] [2022-02-24 02:47:20,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [774691069] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:20,069 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:20,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:47:20,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748319840] [2022-02-24 02:47:20,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:20,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:47:20,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:20,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:47:20,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:47:20,070 INFO L87 Difference]: Start difference. First operand 158 states and 201 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 02:47:20,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:20,736 INFO L93 Difference]: Finished difference Result 235 states and 302 transitions. [2022-02-24 02:47:20,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:47:20,738 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 02:47:20,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:20,738 INFO L225 Difference]: With dead ends: 235 [2022-02-24 02:47:20,739 INFO L226 Difference]: Without dead ends: 171 [2022-02-24 02:47:20,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:47:20,739 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 122 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:20,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 91 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:20,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-02-24 02:47:20,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-02-24 02:47:20,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.284848484848485) internal successors, (212), 165 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 216 transitions. [2022-02-24 02:47:20,819 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 216 transitions. Word has length 68 [2022-02-24 02:47:20,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:20,819 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 216 transitions. [2022-02-24 02:47:20,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 02:47:20,820 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 216 transitions. [2022-02-24 02:47:20,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:20,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:20,820 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:20,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 02:47:20,820 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:20,821 INFO L85 PathProgramCache]: Analyzing trace with hash -222221800, now seen corresponding path program 1 times [2022-02-24 02:47:20,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:20,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662175453] [2022-02-24 02:47:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:20,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:20,823 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:20,824 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:21,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:21,168 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:21,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662175453] [2022-02-24 02:47:21,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1662175453] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:21,169 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:21,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:47:21,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951554279] [2022-02-24 02:47:21,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:21,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:47:21,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:21,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:47:21,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:47:21,170 INFO L87 Difference]: Start difference. First operand 170 states and 216 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:21,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:21,724 INFO L93 Difference]: Finished difference Result 246 states and 315 transitions. [2022-02-24 02:47:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:47:21,724 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 02:47:21,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:21,725 INFO L225 Difference]: With dead ends: 246 [2022-02-24 02:47:21,725 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 02:47:21,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:47:21,726 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 106 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:21,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 81 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:21,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 02:47:21,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-02-24 02:47:21,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.2787878787878788) internal successors, (211), 165 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 215 transitions. [2022-02-24 02:47:21,796 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 215 transitions. Word has length 68 [2022-02-24 02:47:21,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:21,797 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 215 transitions. [2022-02-24 02:47:21,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 215 transitions. [2022-02-24 02:47:21,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:21,797 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:21,797 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:21,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 02:47:21,797 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:21,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1502085478, now seen corresponding path program 2 times [2022-02-24 02:47:21,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:21,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541682152] [2022-02-24 02:47:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:21,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:21,801 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:21,801 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:22,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:22,144 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:22,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541682152] [2022-02-24 02:47:22,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1541682152] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:22,144 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:22,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:47:22,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300675422] [2022-02-24 02:47:22,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:22,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:47:22,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:22,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:47:22,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:47:22,145 INFO L87 Difference]: Start difference. First operand 170 states and 215 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:22,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:22,590 INFO L93 Difference]: Finished difference Result 246 states and 313 transitions. [2022-02-24 02:47:22,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:47:22,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 02:47:22,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:22,591 INFO L225 Difference]: With dead ends: 246 [2022-02-24 02:47:22,591 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 02:47:22,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:47:22,593 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 96 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:22,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 73 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 02:47:22,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-02-24 02:47:22,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.2727272727272727) internal successors, (210), 165 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:22,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 214 transitions. [2022-02-24 02:47:22,666 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 214 transitions. Word has length 68 [2022-02-24 02:47:22,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:22,666 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 214 transitions. [2022-02-24 02:47:22,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:22,666 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 214 transitions. [2022-02-24 02:47:22,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:22,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:22,666 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:22,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 02:47:22,667 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:22,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1079383652, now seen corresponding path program 3 times [2022-02-24 02:47:22,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:22,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530003684] [2022-02-24 02:47:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:22,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:22,669 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:22,669 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:22,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:22,996 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:22,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530003684] [2022-02-24 02:47:22,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [530003684] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:22,996 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:22,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:47:22,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667923183] [2022-02-24 02:47:22,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:22,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:47:22,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:22,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:47:22,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:47:22,997 INFO L87 Difference]: Start difference. First operand 170 states and 214 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:23,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:23,485 INFO L93 Difference]: Finished difference Result 246 states and 311 transitions. [2022-02-24 02:47:23,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:47:23,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 02:47:23,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:23,486 INFO L225 Difference]: With dead ends: 246 [2022-02-24 02:47:23,486 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 02:47:23,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:47:23,487 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 111 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:23,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 66 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:23,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 02:47:23,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-02-24 02:47:23,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.2666666666666666) internal successors, (209), 165 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:23,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 213 transitions. [2022-02-24 02:47:23,556 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 213 transitions. Word has length 68 [2022-02-24 02:47:23,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:23,556 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 213 transitions. [2022-02-24 02:47:23,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:23,557 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 213 transitions. [2022-02-24 02:47:23,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:23,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:23,557 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:23,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 02:47:23,557 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:23,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:23,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1221438938, now seen corresponding path program 4 times [2022-02-24 02:47:23,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:23,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726698024] [2022-02-24 02:47:23,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:23,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:23,560 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:23,560 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:23,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:23,879 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:23,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726698024] [2022-02-24 02:47:23,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1726698024] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:23,879 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:23,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:47:23,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130928145] [2022-02-24 02:47:23,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:23,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:47:23,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:23,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:47:23,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:47:23,880 INFO L87 Difference]: Start difference. First operand 170 states and 213 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:24,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:24,339 INFO L93 Difference]: Finished difference Result 253 states and 318 transitions. [2022-02-24 02:47:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:47:24,339 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 68 [2022-02-24 02:47:24,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:24,340 INFO L225 Difference]: With dead ends: 253 [2022-02-24 02:47:24,340 INFO L226 Difference]: Without dead ends: 177 [2022-02-24 02:47:24,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:47:24,341 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 114 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:24,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 63 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:24,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-24 02:47:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-02-24 02:47:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.263157894736842) internal successors, (216), 171 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:24,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 220 transitions. [2022-02-24 02:47:24,428 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 220 transitions. Word has length 68 [2022-02-24 02:47:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:24,428 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 220 transitions. [2022-02-24 02:47:24,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 220 transitions. [2022-02-24 02:47:24,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:24,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:24,429 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:24,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 02:47:24,429 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:24,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:24,429 INFO L85 PathProgramCache]: Analyzing trace with hash -614400744, now seen corresponding path program 5 times [2022-02-24 02:47:24,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:24,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911979211] [2022-02-24 02:47:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:24,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:24,431 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:24,432 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:24,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:24,732 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:24,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911979211] [2022-02-24 02:47:24,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1911979211] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:24,732 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:24,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:47:24,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700043572] [2022-02-24 02:47:24,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:24,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:47:24,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:24,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:47:24,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:47:24,734 INFO L87 Difference]: Start difference. First operand 176 states and 220 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 02:47:25,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:25,382 INFO L93 Difference]: Finished difference Result 265 states and 332 transitions. [2022-02-24 02:47:25,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:47:25,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 02:47:25,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:25,383 INFO L225 Difference]: With dead ends: 265 [2022-02-24 02:47:25,383 INFO L226 Difference]: Without dead ends: 183 [2022-02-24 02:47:25,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:47:25,384 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 152 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:25,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 91 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:25,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-24 02:47:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2022-02-24 02:47:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.264367816091954) internal successors, (220), 174 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 224 transitions. [2022-02-24 02:47:25,460 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 224 transitions. Word has length 68 [2022-02-24 02:47:25,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:25,460 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 224 transitions. [2022-02-24 02:47:25,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 02:47:25,460 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 224 transitions. [2022-02-24 02:47:25,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:25,461 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:25,461 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:25,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 02:47:25,461 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:25,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:25,461 INFO L85 PathProgramCache]: Analyzing trace with hash -356235306, now seen corresponding path program 6 times [2022-02-24 02:47:25,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:25,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646716476] [2022-02-24 02:47:25,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:25,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:25,464 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:25,464 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:25,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:25,751 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:25,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646716476] [2022-02-24 02:47:25,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1646716476] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:25,751 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:25,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:47:25,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248958478] [2022-02-24 02:47:25,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:25,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:47:25,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:25,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:47:25,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:47:25,754 INFO L87 Difference]: Start difference. First operand 179 states and 224 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 02:47:26,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:26,246 INFO L93 Difference]: Finished difference Result 268 states and 336 transitions. [2022-02-24 02:47:26,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:47:26,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 02:47:26,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:26,247 INFO L225 Difference]: With dead ends: 268 [2022-02-24 02:47:26,247 INFO L226 Difference]: Without dead ends: 183 [2022-02-24 02:47:26,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:47:26,248 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 131 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:26,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 73 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:26,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-24 02:47:26,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-02-24 02:47:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2598870056497176) internal successors, (223), 177 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 227 transitions. [2022-02-24 02:47:26,332 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 227 transitions. Word has length 68 [2022-02-24 02:47:26,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:26,332 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 227 transitions. [2022-02-24 02:47:26,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 02:47:26,332 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 227 transitions. [2022-02-24 02:47:26,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:26,333 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:26,333 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:26,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 02:47:26,333 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:26,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1686421846, now seen corresponding path program 7 times [2022-02-24 02:47:26,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:26,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470088783] [2022-02-24 02:47:26,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:26,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:26,336 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:26,336 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:26,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:26,624 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:26,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470088783] [2022-02-24 02:47:26,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1470088783] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:26,624 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:26,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:47:26,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459769900] [2022-02-24 02:47:26,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:26,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:47:26,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:26,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:47:26,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:47:26,625 INFO L87 Difference]: Start difference. First operand 182 states and 227 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 02:47:27,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:27,323 INFO L93 Difference]: Finished difference Result 277 states and 345 transitions. [2022-02-24 02:47:27,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:47:27,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 02:47:27,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:27,325 INFO L225 Difference]: With dead ends: 277 [2022-02-24 02:47:27,325 INFO L226 Difference]: Without dead ends: 189 [2022-02-24 02:47:27,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:47:27,330 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 205 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:27,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 89 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:47:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-24 02:47:27,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 182. [2022-02-24 02:47:27,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2598870056497176) internal successors, (223), 177 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:27,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 227 transitions. [2022-02-24 02:47:27,423 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 227 transitions. Word has length 68 [2022-02-24 02:47:27,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:27,424 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 227 transitions. [2022-02-24 02:47:27,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 02:47:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 227 transitions. [2022-02-24 02:47:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:27,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:27,425 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:27,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 02:47:27,425 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:27,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:27,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1944587284, now seen corresponding path program 8 times [2022-02-24 02:47:27,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:27,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731765725] [2022-02-24 02:47:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:27,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:27,427 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:27,427 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:27,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:27,723 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:27,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731765725] [2022-02-24 02:47:27,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [731765725] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:27,724 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:27,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:47:27,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142182485] [2022-02-24 02:47:27,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:27,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:47:27,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:47:27,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:47:27,724 INFO L87 Difference]: Start difference. First operand 182 states and 227 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:28,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:28,280 INFO L93 Difference]: Finished difference Result 274 states and 342 transitions. [2022-02-24 02:47:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:47:28,280 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 02:47:28,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:28,281 INFO L225 Difference]: With dead ends: 274 [2022-02-24 02:47:28,281 INFO L226 Difference]: Without dead ends: 186 [2022-02-24 02:47:28,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:47:28,282 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 133 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:28,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 94 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-02-24 02:47:28,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2022-02-24 02:47:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.2555555555555555) internal successors, (226), 180 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 230 transitions. [2022-02-24 02:47:28,370 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 230 transitions. Word has length 68 [2022-02-24 02:47:28,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:28,370 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 230 transitions. [2022-02-24 02:47:28,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:28,370 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 230 transitions. [2022-02-24 02:47:28,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:28,371 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:28,371 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:28,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 02:47:28,371 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:28,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:28,371 INFO L85 PathProgramCache]: Analyzing trace with hash 406558168, now seen corresponding path program 9 times [2022-02-24 02:47:28,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:28,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888131640] [2022-02-24 02:47:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:28,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:28,373 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:28,373 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:28,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:28,672 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:28,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888131640] [2022-02-24 02:47:28,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1888131640] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:28,673 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:28,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:47:28,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338039337] [2022-02-24 02:47:28,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:28,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:47:28,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:28,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:47:28,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:47:28,673 INFO L87 Difference]: Start difference. First operand 185 states and 230 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 02:47:29,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:29,290 INFO L93 Difference]: Finished difference Result 280 states and 348 transitions. [2022-02-24 02:47:29,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:47:29,291 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 02:47:29,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:29,291 INFO L225 Difference]: With dead ends: 280 [2022-02-24 02:47:29,291 INFO L226 Difference]: Without dead ends: 189 [2022-02-24 02:47:29,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:47:29,292 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 133 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:29,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 99 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:29,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-24 02:47:29,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 179. [2022-02-24 02:47:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.264367816091954) internal successors, (220), 174 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:29,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 224 transitions. [2022-02-24 02:47:29,372 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 224 transitions. Word has length 68 [2022-02-24 02:47:29,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:29,372 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 224 transitions. [2022-02-24 02:47:29,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 02:47:29,372 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 224 transitions. [2022-02-24 02:47:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:29,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:29,373 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:29,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 02:47:29,373 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:29,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:29,373 INFO L85 PathProgramCache]: Analyzing trace with hash 664723606, now seen corresponding path program 10 times [2022-02-24 02:47:29,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:29,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262173687] [2022-02-24 02:47:29,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:29,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:29,377 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:29,377 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:29,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:29,711 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:29,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262173687] [2022-02-24 02:47:29,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [262173687] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:29,712 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:29,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:47:29,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528875126] [2022-02-24 02:47:29,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:29,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:47:29,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:47:29,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:47:29,712 INFO L87 Difference]: Start difference. First operand 179 states and 224 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:30,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:30,198 INFO L93 Difference]: Finished difference Result 268 states and 336 transitions. [2022-02-24 02:47:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:47:30,198 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have 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 02:47:30,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:30,199 INFO L225 Difference]: With dead ends: 268 [2022-02-24 02:47:30,199 INFO L226 Difference]: Without dead ends: 183 [2022-02-24 02:47:30,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:47:30,199 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 73 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:30,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 72 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:30,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-24 02:47:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-02-24 02:47:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2598870056497176) internal successors, (223), 177 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 227 transitions. [2022-02-24 02:47:30,282 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 227 transitions. Word has length 68 [2022-02-24 02:47:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:30,282 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 227 transitions. [2022-02-24 02:47:30,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:30,282 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 227 transitions. [2022-02-24 02:47:30,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:30,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:30,282 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:30,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 02:47:30,283 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:30,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:30,283 INFO L85 PathProgramCache]: Analyzing trace with hash 66466520, now seen corresponding path program 11 times [2022-02-24 02:47:30,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:30,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673952243] [2022-02-24 02:47:30,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:30,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:30,285 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:30,285 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:30,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:30,564 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:30,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673952243] [2022-02-24 02:47:30,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [673952243] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:30,564 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:30,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:47:30,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295138233] [2022-02-24 02:47:30,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:30,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:47:30,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:30,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:47:30,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:47:30,565 INFO L87 Difference]: Start difference. First operand 182 states and 227 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:31,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:31,112 INFO L93 Difference]: Finished difference Result 271 states and 338 transitions. [2022-02-24 02:47:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:47:31,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 02:47:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:31,113 INFO L225 Difference]: With dead ends: 271 [2022-02-24 02:47:31,113 INFO L226 Difference]: Without dead ends: 183 [2022-02-24 02:47:31,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:47:31,114 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 137 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:31,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 73 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-24 02:47:31,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2022-02-24 02:47:31,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.2586206896551724) internal successors, (219), 174 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:31,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 223 transitions. [2022-02-24 02:47:31,195 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 223 transitions. Word has length 68 [2022-02-24 02:47:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:31,195 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 223 transitions. [2022-02-24 02:47:31,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:31,196 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 223 transitions. [2022-02-24 02:47:31,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:31,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:31,196 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:31,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 02:47:31,196 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:31,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:31,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1213397158, now seen corresponding path program 12 times [2022-02-24 02:47:31,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:31,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170481506] [2022-02-24 02:47:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:31,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:31,199 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:31,199 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:31,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:31,627 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:31,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170481506] [2022-02-24 02:47:31,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1170481506] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:31,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:31,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:47:31,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566864754] [2022-02-24 02:47:31,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:31,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:47:31,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:31,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:47:31,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:47:31,628 INFO L87 Difference]: Start difference. First operand 179 states and 223 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:32,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:32,196 INFO L93 Difference]: Finished difference Result 268 states and 334 transitions. [2022-02-24 02:47:32,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:47:32,196 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 02:47:32,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:32,197 INFO L225 Difference]: With dead ends: 268 [2022-02-24 02:47:32,197 INFO L226 Difference]: Without dead ends: 183 [2022-02-24 02:47:32,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:47:32,198 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 88 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:32,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 73 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:32,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-24 02:47:32,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-02-24 02:47:32,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2542372881355932) internal successors, (222), 177 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:32,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 226 transitions. [2022-02-24 02:47:32,282 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 226 transitions. Word has length 68 [2022-02-24 02:47:32,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:32,282 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 226 transitions. [2022-02-24 02:47:32,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:32,282 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 226 transitions. [2022-02-24 02:47:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:32,283 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:32,283 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:32,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 02:47:32,283 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:32,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:32,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1927678186, now seen corresponding path program 13 times [2022-02-24 02:47:32,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:32,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105203471] [2022-02-24 02:47:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:32,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:32,286 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:32,286 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:32,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:32,719 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:32,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105203471] [2022-02-24 02:47:32,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2105203471] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:32,719 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:32,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:47:32,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567581719] [2022-02-24 02:47:32,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:32,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:47:32,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:32,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:47:32,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:47:32,720 INFO L87 Difference]: Start difference. First operand 182 states and 226 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:33,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:33,310 INFO L93 Difference]: Finished difference Result 274 states and 340 transitions. [2022-02-24 02:47:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:47:33,311 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 02:47:33,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:33,312 INFO L225 Difference]: With dead ends: 274 [2022-02-24 02:47:33,312 INFO L226 Difference]: Without dead ends: 186 [2022-02-24 02:47:33,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:47:33,312 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 82 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:33,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 74 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:33,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-02-24 02:47:33,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2022-02-24 02:47:33,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.25) internal successors, (225), 180 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:33,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 229 transitions. [2022-02-24 02:47:33,398 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 229 transitions. Word has length 68 [2022-02-24 02:47:33,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:33,399 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 229 transitions. [2022-02-24 02:47:33,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:33,399 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 229 transitions. [2022-02-24 02:47:33,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:33,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:33,399 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:33,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 02:47:33,399 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:33,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:33,400 INFO L85 PathProgramCache]: Analyzing trace with hash 829259994, now seen corresponding path program 14 times [2022-02-24 02:47:33,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:33,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574585485] [2022-02-24 02:47:33,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:33,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:33,402 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:33,402 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:33,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:33,851 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:33,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574585485] [2022-02-24 02:47:33,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1574585485] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:33,851 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:33,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:47:33,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360789639] [2022-02-24 02:47:33,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:33,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:47:33,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:33,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:47:33,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:47:33,852 INFO L87 Difference]: Start difference. First operand 185 states and 229 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 02:47:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:34,680 INFO L93 Difference]: Finished difference Result 316 states and 386 transitions. [2022-02-24 02:47:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:47:34,683 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 02:47:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:34,684 INFO L225 Difference]: With dead ends: 316 [2022-02-24 02:47:34,684 INFO L226 Difference]: Without dead ends: 225 [2022-02-24 02:47:34,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:47:34,685 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 107 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:34,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 93 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-02-24 02:47:34,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 200. [2022-02-24 02:47:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.2512820512820513) internal successors, (244), 195 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:34,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 248 transitions. [2022-02-24 02:47:34,784 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 248 transitions. Word has length 68 [2022-02-24 02:47:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:34,784 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 248 transitions. [2022-02-24 02:47:34,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 02:47:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 248 transitions. [2022-02-24 02:47:34,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:34,785 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:34,785 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:34,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 02:47:34,785 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:34,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:34,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1087425432, now seen corresponding path program 15 times [2022-02-24 02:47:34,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:34,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310877892] [2022-02-24 02:47:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:34,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:34,787 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:34,787 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:35,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:35,057 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:35,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310877892] [2022-02-24 02:47:35,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [310877892] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:35,057 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:35,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:47:35,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534089663] [2022-02-24 02:47:35,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:35,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:47:35,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:35,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:47:35,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:47:35,058 INFO L87 Difference]: Start difference. First operand 200 states and 248 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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 02:47:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:35,323 INFO L93 Difference]: Finished difference Result 310 states and 384 transitions. [2022-02-24 02:47:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:47:35,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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 68 [2022-02-24 02:47:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:35,324 INFO L225 Difference]: With dead ends: 310 [2022-02-24 02:47:35,324 INFO L226 Difference]: Without dead ends: 204 [2022-02-24 02:47:35,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:47:35,324 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 56 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:35,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 53 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-02-24 02:47:35,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2022-02-24 02:47:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.2474747474747474) internal successors, (247), 198 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:35,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 251 transitions. [2022-02-24 02:47:35,424 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 251 transitions. Word has length 68 [2022-02-24 02:47:35,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:35,425 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 251 transitions. [2022-02-24 02:47:35,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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 02:47:35,425 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 251 transitions. [2022-02-24 02:47:35,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:35,425 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:35,425 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:35,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 02:47:35,426 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:35,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:35,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1244071192, now seen corresponding path program 16 times [2022-02-24 02:47:35,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:35,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040372593] [2022-02-24 02:47:35,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:35,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:35,428 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:35,428 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:35,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:35,699 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:35,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040372593] [2022-02-24 02:47:35,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2040372593] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:35,699 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:35,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:47:35,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624885797] [2022-02-24 02:47:35,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:35,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:47:35,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:35,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:47:35,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:47:35,700 INFO L87 Difference]: Start difference. First operand 203 states and 251 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:36,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:36,108 INFO L93 Difference]: Finished difference Result 323 states and 399 transitions. [2022-02-24 02:47:36,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:47:36,108 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 68 [2022-02-24 02:47:36,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:36,109 INFO L225 Difference]: With dead ends: 323 [2022-02-24 02:47:36,109 INFO L226 Difference]: Without dead ends: 214 [2022-02-24 02:47:36,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:47:36,110 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:36,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 68 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:36,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-24 02:47:36,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2022-02-24 02:47:36,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.2415458937198067) internal successors, (257), 207 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:36,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 261 transitions. [2022-02-24 02:47:36,215 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 261 transitions. Word has length 68 [2022-02-24 02:47:36,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:36,216 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 261 transitions. [2022-02-24 02:47:36,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:36,216 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 261 transitions. [2022-02-24 02:47:36,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:36,217 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:36,217 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:36,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 02:47:36,217 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:36,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:36,217 INFO L85 PathProgramCache]: Analyzing trace with hash 687355860, now seen corresponding path program 17 times [2022-02-24 02:47:36,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:36,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90530844] [2022-02-24 02:47:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:36,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:36,220 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:36,220 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:36,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:36,553 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:36,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90530844] [2022-02-24 02:47:36,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [90530844] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:36,553 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:36,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:47:36,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380903085] [2022-02-24 02:47:36,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:36,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:47:36,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:36,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:47:36,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:47:36,554 INFO L87 Difference]: Start difference. First operand 212 states and 261 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:36,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:36,996 INFO L93 Difference]: Finished difference Result 338 states and 415 transitions. [2022-02-24 02:47:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:47:36,996 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have 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 02:47:36,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:36,997 INFO L225 Difference]: With dead ends: 338 [2022-02-24 02:47:36,997 INFO L226 Difference]: Without dead ends: 220 [2022-02-24 02:47:36,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:47:36,998 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:36,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 69 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:36,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-24 02:47:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2022-02-24 02:47:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.2347417840375587) internal successors, (263), 213 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 267 transitions. [2022-02-24 02:47:37,107 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 267 transitions. Word has length 68 [2022-02-24 02:47:37,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:37,108 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 267 transitions. [2022-02-24 02:47:37,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:37,108 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 267 transitions. [2022-02-24 02:47:37,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:37,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:37,108 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:37,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 02:47:37,108 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:37,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:37,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1190764904, now seen corresponding path program 18 times [2022-02-24 02:47:37,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:37,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056159107] [2022-02-24 02:47:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:37,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:37,111 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:37,111 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:37,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:37,483 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:37,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056159107] [2022-02-24 02:47:37,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2056159107] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:37,483 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:37,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:47:37,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083771760] [2022-02-24 02:47:37,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:37,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:47:37,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:37,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:47:37,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:47:37,484 INFO L87 Difference]: Start difference. First operand 218 states and 267 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:37,965 INFO L93 Difference]: Finished difference Result 350 states and 427 transitions. [2022-02-24 02:47:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:47:37,965 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 02:47:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:37,966 INFO L225 Difference]: With dead ends: 350 [2022-02-24 02:47:37,966 INFO L226 Difference]: Without dead ends: 226 [2022-02-24 02:47:37,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:47:37,967 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:37,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 74 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:37,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-02-24 02:47:38,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2022-02-24 02:47:38,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.2283105022831051) internal successors, (269), 219 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 273 transitions. [2022-02-24 02:47:38,083 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 273 transitions. Word has length 68 [2022-02-24 02:47:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:38,083 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 273 transitions. [2022-02-24 02:47:38,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 273 transitions. [2022-02-24 02:47:38,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:38,084 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:38,084 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:38,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 02:47:38,084 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:38,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:38,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1905045932, now seen corresponding path program 19 times [2022-02-24 02:47:38,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:38,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703524500] [2022-02-24 02:47:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:38,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:38,087 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:38,087 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:38,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:38,471 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:38,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703524500] [2022-02-24 02:47:38,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1703524500] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:38,471 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:38,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:47:38,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452185854] [2022-02-24 02:47:38,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:38,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:47:38,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:38,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:47:38,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:47:38,472 INFO L87 Difference]: Start difference. First operand 224 states and 273 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:39,006 INFO L93 Difference]: Finished difference Result 362 states and 439 transitions. [2022-02-24 02:47:39,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:47:39,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 02:47:39,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:39,020 INFO L225 Difference]: With dead ends: 362 [2022-02-24 02:47:39,020 INFO L226 Difference]: Without dead ends: 232 [2022-02-24 02:47:39,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:47:39,021 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 59 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:39,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 79 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-24 02:47:39,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 203. [2022-02-24 02:47:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.2474747474747474) internal successors, (247), 198 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 251 transitions. [2022-02-24 02:47:39,124 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 251 transitions. Word has length 68 [2022-02-24 02:47:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:39,124 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 251 transitions. [2022-02-24 02:47:39,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:39,125 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 251 transitions. [2022-02-24 02:47:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 02:47:39,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:39,125 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:39,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 02:47:39,125 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:39,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1110057686, now seen corresponding path program 20 times [2022-02-24 02:47:39,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:39,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546816098] [2022-02-24 02:47:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:39,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:39,128 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:39,128 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:39,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:39,247 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:39,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546816098] [2022-02-24 02:47:39,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [546816098] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:39,247 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:39,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:47:39,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120221353] [2022-02-24 02:47:39,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:39,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:47:39,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:39,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:47:39,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:47:39,248 INFO L87 Difference]: Start difference. First operand 203 states and 251 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 02:47:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:39,624 INFO L93 Difference]: Finished difference Result 413 states and 519 transitions. [2022-02-24 02:47:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:47:39,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 68 [2022-02-24 02:47:39,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:39,625 INFO L225 Difference]: With dead ends: 413 [2022-02-24 02:47:39,625 INFO L226 Difference]: Without dead ends: 408 [2022-02-24 02:47:39,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:47:39,626 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 120 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:39,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 56 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:39,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-02-24 02:47:39,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 205. [2022-02-24 02:47:39,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.245) internal successors, (249), 200 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 253 transitions. [2022-02-24 02:47:39,742 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 253 transitions. Word has length 68 [2022-02-24 02:47:39,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:39,742 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 253 transitions. [2022-02-24 02:47:39,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 02:47:39,742 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 253 transitions. [2022-02-24 02:47:39,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 02:47:39,743 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:39,743 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:39,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 02:47:39,744 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:39,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1762866155, now seen corresponding path program 2 times [2022-02-24 02:47:39,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:39,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845376913] [2022-02-24 02:47:39,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:39,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:39,747 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:39,747 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:39,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:39,862 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:39,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845376913] [2022-02-24 02:47:39,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [845376913] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:39,863 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:39,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:47:39,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546842458] [2022-02-24 02:47:39,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:39,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:47:39,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:39,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:47:39,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:47:39,864 INFO L87 Difference]: Start difference. First operand 205 states and 253 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:40,372 INFO L93 Difference]: Finished difference Result 389 states and 489 transitions. [2022-02-24 02:47:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:47:40,383 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 70 [2022-02-24 02:47:40,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:40,384 INFO L225 Difference]: With dead ends: 389 [2022-02-24 02:47:40,384 INFO L226 Difference]: Without dead ends: 219 [2022-02-24 02:47:40,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:47:40,385 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 161 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:40,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 93 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:40,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-02-24 02:47:40,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 211. [2022-02-24 02:47:40,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.2378640776699028) internal successors, (255), 206 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 259 transitions. [2022-02-24 02:47:40,509 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 259 transitions. Word has length 70 [2022-02-24 02:47:40,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:40,509 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 259 transitions. [2022-02-24 02:47:40,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:40,510 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 259 transitions. [2022-02-24 02:47:40,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:40,510 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:40,510 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:40,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 02:47:40,510 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:40,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:40,511 INFO L85 PathProgramCache]: Analyzing trace with hash 225571355, now seen corresponding path program 3 times [2022-02-24 02:47:40,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:40,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330693853] [2022-02-24 02:47:40,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:40,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:40,513 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:40,513 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:40,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:40,835 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:40,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330693853] [2022-02-24 02:47:40,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1330693853] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:40,835 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:40,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:47:40,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328046613] [2022-02-24 02:47:40,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:40,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:47:40,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:40,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:47:40,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:47:40,836 INFO L87 Difference]: Start difference. First operand 211 states and 259 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:41,652 INFO L93 Difference]: Finished difference Result 269 states and 334 transitions. [2022-02-24 02:47:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:47:41,653 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 02:47:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:41,653 INFO L225 Difference]: With dead ends: 269 [2022-02-24 02:47:41,653 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 02:47:41,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:47:41,654 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 124 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:41,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 103 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:47:41,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 02:47:41,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2022-02-24 02:47:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2410714285714286) internal successors, (278), 224 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 282 transitions. [2022-02-24 02:47:41,797 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 282 transitions. Word has length 73 [2022-02-24 02:47:41,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:41,797 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 282 transitions. [2022-02-24 02:47:41,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:41,797 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 282 transitions. [2022-02-24 02:47:41,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:41,798 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:41,798 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:41,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 02:47:41,798 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:41,798 INFO L85 PathProgramCache]: Analyzing trace with hash -167455655, now seen corresponding path program 1 times [2022-02-24 02:47:41,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:41,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018990794] [2022-02-24 02:47:41,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:41,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:41,800 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:41,800 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:42,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:42,064 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:42,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018990794] [2022-02-24 02:47:42,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1018990794] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:42,064 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:42,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:47:42,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019765721] [2022-02-24 02:47:42,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:42,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:47:42,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:42,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:47:42,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:47:42,065 INFO L87 Difference]: Start difference. First operand 229 states and 282 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 02:47:42,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:42,585 INFO L93 Difference]: Finished difference Result 286 states and 355 transitions. [2022-02-24 02:47:42,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:47:42,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 73 [2022-02-24 02:47:42,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:42,586 INFO L225 Difference]: With dead ends: 286 [2022-02-24 02:47:42,586 INFO L226 Difference]: Without dead ends: 229 [2022-02-24 02:47:42,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:47:42,587 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 161 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:42,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 67 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:42,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-24 02:47:42,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-02-24 02:47:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2366071428571428) internal successors, (277), 224 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:42,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 281 transitions. [2022-02-24 02:47:42,736 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 281 transitions. Word has length 73 [2022-02-24 02:47:42,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:42,737 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 281 transitions. [2022-02-24 02:47:42,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 02:47:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 281 transitions. [2022-02-24 02:47:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:42,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:42,737 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:42,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 02:47:42,738 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:42,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:42,738 INFO L85 PathProgramCache]: Analyzing trace with hash 51399063, now seen corresponding path program 2 times [2022-02-24 02:47:42,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:42,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699015632] [2022-02-24 02:47:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:42,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:42,740 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:42,740 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:42,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:43,002 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:43,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699015632] [2022-02-24 02:47:43,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1699015632] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:43,002 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:43,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:47:43,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137197678] [2022-02-24 02:47:43,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:43,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:47:43,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:43,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:47:43,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:47:43,003 INFO L87 Difference]: Start difference. First operand 229 states and 281 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:43,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:43,586 INFO L93 Difference]: Finished difference Result 286 states and 353 transitions. [2022-02-24 02:47:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:47:43,586 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 02:47:43,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:43,587 INFO L225 Difference]: With dead ends: 286 [2022-02-24 02:47:43,587 INFO L226 Difference]: Without dead ends: 229 [2022-02-24 02:47:43,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:47:43,588 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 120 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:43,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 92 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:43,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-24 02:47:43,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-02-24 02:47:43,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2321428571428572) internal successors, (276), 224 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:43,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 280 transitions. [2022-02-24 02:47:43,743 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 280 transitions. Word has length 73 [2022-02-24 02:47:43,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:43,743 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 280 transitions. [2022-02-24 02:47:43,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:43,744 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 280 transitions. [2022-02-24 02:47:43,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:43,744 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:43,744 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:43,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 02:47:43,744 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:43,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1637544679, now seen corresponding path program 3 times [2022-02-24 02:47:43,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:43,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337035899] [2022-02-24 02:47:43,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:43,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:43,747 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:43,747 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:44,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:44,078 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:44,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337035899] [2022-02-24 02:47:44,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1337035899] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:44,078 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:44,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:47:44,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982332261] [2022-02-24 02:47:44,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:44,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:47:44,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:44,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:47:44,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:47:44,079 INFO L87 Difference]: Start difference. First operand 229 states and 280 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:44,836 INFO L93 Difference]: Finished difference Result 286 states and 351 transitions. [2022-02-24 02:47:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:47:44,836 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 73 [2022-02-24 02:47:44,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:44,837 INFO L225 Difference]: With dead ends: 286 [2022-02-24 02:47:44,837 INFO L226 Difference]: Without dead ends: 229 [2022-02-24 02:47:44,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:47:44,838 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 145 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:44,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 99 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:47:44,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-24 02:47:44,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-02-24 02:47:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2276785714285714) internal successors, (275), 224 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:44,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 279 transitions. [2022-02-24 02:47:44,992 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 279 transitions. Word has length 73 [2022-02-24 02:47:44,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:44,992 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 279 transitions. [2022-02-24 02:47:44,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:44,993 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 279 transitions. [2022-02-24 02:47:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:44,993 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:44,993 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:44,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 02:47:44,993 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:44,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2070616603, now seen corresponding path program 4 times [2022-02-24 02:47:44,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:44,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910897880] [2022-02-24 02:47:44,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:44,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:44,996 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:44,996 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:45,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:45,297 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:45,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910897880] [2022-02-24 02:47:45,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [910897880] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:45,297 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:45,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:47:45,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173062979] [2022-02-24 02:47:45,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:45,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:47:45,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:45,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:47:45,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:47:45,298 INFO L87 Difference]: Start difference. First operand 229 states and 279 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:45,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:45,952 INFO L93 Difference]: Finished difference Result 286 states and 349 transitions. [2022-02-24 02:47:45,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:47:45,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 02:47:45,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:45,953 INFO L225 Difference]: With dead ends: 286 [2022-02-24 02:47:45,953 INFO L226 Difference]: Without dead ends: 229 [2022-02-24 02:47:45,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:47:45,954 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 120 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:45,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 97 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:45,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-24 02:47:46,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-02-24 02:47:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2232142857142858) internal successors, (274), 224 states have internal predecessors, (274), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:46,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 278 transitions. [2022-02-24 02:47:46,096 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 278 transitions. Word has length 73 [2022-02-24 02:47:46,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:46,096 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 278 transitions. [2022-02-24 02:47:46,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:46,096 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 278 transitions. [2022-02-24 02:47:46,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:46,097 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:46,097 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:46,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 02:47:46,097 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:46,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:46,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1049548249, now seen corresponding path program 5 times [2022-02-24 02:47:46,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:46,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566613331] [2022-02-24 02:47:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:46,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:46,100 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:46,100 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:46,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:46,343 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:46,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566613331] [2022-02-24 02:47:46,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [566613331] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:46,343 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:46,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:47:46,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354338132] [2022-02-24 02:47:46,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:46,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:47:46,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:46,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:47:46,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:47:46,344 INFO L87 Difference]: Start difference. First operand 229 states and 278 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:46,816 INFO L93 Difference]: Finished difference Result 286 states and 347 transitions. [2022-02-24 02:47:46,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:47:46,817 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 73 [2022-02-24 02:47:46,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:46,817 INFO L225 Difference]: With dead ends: 286 [2022-02-24 02:47:46,817 INFO L226 Difference]: Without dead ends: 229 [2022-02-24 02:47:46,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:47:46,818 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 154 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:46,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 61 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:46,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-24 02:47:46,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-02-24 02:47:46,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.21875) internal successors, (273), 224 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:46,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 277 transitions. [2022-02-24 02:47:46,959 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 277 transitions. Word has length 73 [2022-02-24 02:47:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:46,959 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 277 transitions. [2022-02-24 02:47:46,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 277 transitions. [2022-02-24 02:47:46,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:46,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:46,960 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:46,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 02:47:46,960 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:46,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:46,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1190096859, now seen corresponding path program 6 times [2022-02-24 02:47:46,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:46,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901046870] [2022-02-24 02:47:46,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:46,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:46,963 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:46,963 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:47,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:47,247 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:47,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901046870] [2022-02-24 02:47:47,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1901046870] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:47,247 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:47,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:47:47,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707349186] [2022-02-24 02:47:47,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:47,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:47:47,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:47,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:47:47,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:47:47,248 INFO L87 Difference]: Start difference. First operand 229 states and 277 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:47,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:47,721 INFO L93 Difference]: Finished difference Result 293 states and 354 transitions. [2022-02-24 02:47:47,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:47:47,721 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 73 [2022-02-24 02:47:47,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:47,722 INFO L225 Difference]: With dead ends: 293 [2022-02-24 02:47:47,722 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 02:47:47,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:47:47,723 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 88 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:47,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 71 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 02:47:47,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2022-02-24 02:47:47,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.2173913043478262) internal successors, (280), 230 states have internal predecessors, (280), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:47,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 284 transitions. [2022-02-24 02:47:47,871 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 284 transitions. Word has length 73 [2022-02-24 02:47:47,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:47,871 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 284 transitions. [2022-02-24 02:47:47,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:47,871 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 284 transitions. [2022-02-24 02:47:47,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:47,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:47,872 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:47,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 02:47:47,872 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:47,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:47,872 INFO L85 PathProgramCache]: Analyzing trace with hash -283901735, now seen corresponding path program 7 times [2022-02-24 02:47:47,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:47,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488682595] [2022-02-24 02:47:47,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:47,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:47,875 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:47,875 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:48,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:48,177 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:48,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488682595] [2022-02-24 02:47:48,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1488682595] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:48,177 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:48,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:47:48,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301588900] [2022-02-24 02:47:48,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:48,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:47:48,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:48,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:47:48,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:47:48,178 INFO L87 Difference]: Start difference. First operand 235 states and 284 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:49,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:49,078 INFO L93 Difference]: Finished difference Result 305 states and 368 transitions. [2022-02-24 02:47:49,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:47:49,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 02:47:49,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:49,080 INFO L225 Difference]: With dead ends: 305 [2022-02-24 02:47:49,080 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 02:47:49,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:47:49,083 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 213 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:49,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 107 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:47:49,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 02:47:49,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 238. [2022-02-24 02:47:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.2188841201716738) internal successors, (284), 233 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 288 transitions. [2022-02-24 02:47:49,226 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 288 transitions. Word has length 73 [2022-02-24 02:47:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:49,227 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 288 transitions. [2022-02-24 02:47:49,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 288 transitions. [2022-02-24 02:47:49,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:49,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:49,227 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:49,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 02:47:49,228 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash -676928745, now seen corresponding path program 8 times [2022-02-24 02:47:49,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:49,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752773586] [2022-02-24 02:47:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:49,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:49,230 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:49,230 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:49,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:49,516 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:49,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752773586] [2022-02-24 02:47:49,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1752773586] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:49,516 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:49,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:47:49,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317895802] [2022-02-24 02:47:49,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:49,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:47:49,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:49,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:47:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:47:49,517 INFO L87 Difference]: Start difference. First operand 238 states and 288 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:50,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:50,284 INFO L93 Difference]: Finished difference Result 318 states and 385 transitions. [2022-02-24 02:47:50,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:47:50,285 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 73 [2022-02-24 02:47:50,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:50,286 INFO L225 Difference]: With dead ends: 318 [2022-02-24 02:47:50,286 INFO L226 Difference]: Without dead ends: 252 [2022-02-24 02:47:50,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:47:50,287 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 153 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:50,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 105 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:47:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-02-24 02:47:50,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 247. [2022-02-24 02:47:50,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.21900826446281) internal successors, (295), 242 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:50,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 299 transitions. [2022-02-24 02:47:50,436 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 299 transitions. Word has length 73 [2022-02-24 02:47:50,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:50,436 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 299 transitions. [2022-02-24 02:47:50,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:50,437 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 299 transitions. [2022-02-24 02:47:50,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:50,437 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:50,437 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:50,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 02:47:50,437 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:50,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:50,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1263734759, now seen corresponding path program 9 times [2022-02-24 02:47:50,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:50,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674305072] [2022-02-24 02:47:50,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:50,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:50,440 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:50,440 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:50,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:50,720 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:50,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674305072] [2022-02-24 02:47:50,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1674305072] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:50,720 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:50,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:47:50,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531975292] [2022-02-24 02:47:50,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:50,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:47:50,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:50,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:47:50,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:47:50,721 INFO L87 Difference]: Start difference. First operand 247 states and 299 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 02:47:51,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:51,386 INFO L93 Difference]: Finished difference Result 333 states and 403 transitions. [2022-02-24 02:47:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:47:51,386 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 73 [2022-02-24 02:47:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:51,387 INFO L225 Difference]: With dead ends: 333 [2022-02-24 02:47:51,387 INFO L226 Difference]: Without dead ends: 258 [2022-02-24 02:47:51,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:47:51,388 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 107 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:51,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 91 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:51,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-24 02:47:51,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2022-02-24 02:47:51,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.2151394422310757) internal successors, (305), 251 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 309 transitions. [2022-02-24 02:47:51,545 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 309 transitions. Word has length 73 [2022-02-24 02:47:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:51,545 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 309 transitions. [2022-02-24 02:47:51,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 02:47:51,545 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 309 transitions. [2022-02-24 02:47:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:51,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:51,546 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:51,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 02:47:51,546 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:51,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:51,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1342288795, now seen corresponding path program 10 times [2022-02-24 02:47:51,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:51,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337127985] [2022-02-24 02:47:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:51,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:51,549 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:51,549 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:51,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:51,812 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:51,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337127985] [2022-02-24 02:47:51,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1337127985] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:51,812 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:51,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:47:51,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247105180] [2022-02-24 02:47:51,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:51,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:47:51,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:51,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:47:51,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:47:51,813 INFO L87 Difference]: Start difference. First operand 256 states and 309 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:52,509 INFO L93 Difference]: Finished difference Result 340 states and 409 transitions. [2022-02-24 02:47:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:47:52,509 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 02:47:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:52,510 INFO L225 Difference]: With dead ends: 340 [2022-02-24 02:47:52,510 INFO L226 Difference]: Without dead ends: 256 [2022-02-24 02:47:52,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:47:52,511 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 152 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:52,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 87 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-24 02:47:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-02-24 02:47:52,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.2111553784860558) internal successors, (304), 251 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:52,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 308 transitions. [2022-02-24 02:47:52,668 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 308 transitions. Word has length 73 [2022-02-24 02:47:52,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:52,668 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 308 transitions. [2022-02-24 02:47:52,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:52,668 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 308 transitions. [2022-02-24 02:47:52,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:52,669 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:52,669 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:52,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 02:47:52,669 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:52,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:52,669 INFO L85 PathProgramCache]: Analyzing trace with hash 714247451, now seen corresponding path program 11 times [2022-02-24 02:47:52,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:52,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16516952] [2022-02-24 02:47:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:52,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:52,672 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:52,672 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:52,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:52,989 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:52,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16516952] [2022-02-24 02:47:52,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [16516952] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:52,989 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:52,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:47:52,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012570947] [2022-02-24 02:47:52,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:52,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:47:52,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:52,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:47:52,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:47:52,990 INFO L87 Difference]: Start difference. First operand 256 states and 308 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:53,854 INFO L93 Difference]: Finished difference Result 362 states and 433 transitions. [2022-02-24 02:47:53,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:47:53,854 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 02:47:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:53,855 INFO L225 Difference]: With dead ends: 362 [2022-02-24 02:47:53,855 INFO L226 Difference]: Without dead ends: 278 [2022-02-24 02:47:53,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:47:53,856 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 185 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:53,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 88 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:47:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-24 02:47:54,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 256. [2022-02-24 02:47:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.2151394422310757) internal successors, (305), 251 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 309 transitions. [2022-02-24 02:47:54,020 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 309 transitions. Word has length 73 [2022-02-24 02:47:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:54,020 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 309 transitions. [2022-02-24 02:47:54,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:54,021 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 309 transitions. [2022-02-24 02:47:54,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:54,021 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:54,021 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:54,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 02:47:54,021 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:54,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:54,021 INFO L85 PathProgramCache]: Analyzing trace with hash 321220441, now seen corresponding path program 12 times [2022-02-24 02:47:54,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:54,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562381483] [2022-02-24 02:47:54,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:54,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:54,024 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:54,024 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:54,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:54,275 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:54,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562381483] [2022-02-24 02:47:54,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [562381483] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:54,275 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:54,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:47:54,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130623337] [2022-02-24 02:47:54,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:54,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:47:54,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:54,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:47:54,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:47:54,276 INFO L87 Difference]: Start difference. First operand 256 states and 309 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:54,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:54,829 INFO L93 Difference]: Finished difference Result 340 states and 409 transitions. [2022-02-24 02:47:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:47:54,829 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 73 [2022-02-24 02:47:54,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:54,830 INFO L225 Difference]: With dead ends: 340 [2022-02-24 02:47:54,830 INFO L226 Difference]: Without dead ends: 256 [2022-02-24 02:47:54,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:47:54,831 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 131 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:54,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 85 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:54,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-24 02:47:54,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-02-24 02:47:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.2111553784860558) internal successors, (304), 251 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:54,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 308 transitions. [2022-02-24 02:47:54,997 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 308 transitions. Word has length 73 [2022-02-24 02:47:54,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:54,997 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 308 transitions. [2022-02-24 02:47:54,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 308 transitions. [2022-02-24 02:47:54,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:54,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:54,998 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:54,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 02:47:54,998 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:54,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:54,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2147017769, now seen corresponding path program 13 times [2022-02-24 02:47:54,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:54,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009288833] [2022-02-24 02:47:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:54,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:55,000 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:55,000 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:55,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:55,298 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:55,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009288833] [2022-02-24 02:47:55,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2009288833] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:55,298 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:55,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:47:55,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734290064] [2022-02-24 02:47:55,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:55,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:47:55,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:55,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:47:55,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:47:55,299 INFO L87 Difference]: Start difference. First operand 256 states and 308 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:56,161 INFO L93 Difference]: Finished difference Result 344 states and 412 transitions. [2022-02-24 02:47:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:47:56,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 73 [2022-02-24 02:47:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:56,162 INFO L225 Difference]: With dead ends: 344 [2022-02-24 02:47:56,162 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 02:47:56,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:47:56,162 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 230 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:56,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 77 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:47:56,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 02:47:56,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 256. [2022-02-24 02:47:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.2111553784860558) internal successors, (304), 251 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 308 transitions. [2022-02-24 02:47:56,321 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 308 transitions. Word has length 73 [2022-02-24 02:47:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:56,321 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 308 transitions. [2022-02-24 02:47:56,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 308 transitions. [2022-02-24 02:47:56,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:56,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:56,322 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:56,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 02:47:56,322 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:56,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:56,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1561143513, now seen corresponding path program 14 times [2022-02-24 02:47:56,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:56,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007074351] [2022-02-24 02:47:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:56,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:56,325 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:56,325 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:56,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:56,595 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:56,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007074351] [2022-02-24 02:47:56,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2007074351] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:56,596 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:56,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:47:56,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812987982] [2022-02-24 02:47:56,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:56,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:47:56,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:56,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:47:56,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:47:56,596 INFO L87 Difference]: Start difference. First operand 256 states and 308 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:57,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:57,286 INFO L93 Difference]: Finished difference Result 340 states and 407 transitions. [2022-02-24 02:47:57,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:47:57,286 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 02:47:57,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:57,287 INFO L225 Difference]: With dead ends: 340 [2022-02-24 02:47:57,287 INFO L226 Difference]: Without dead ends: 256 [2022-02-24 02:47:57,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:47:57,288 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 170 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:57,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 83 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:57,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-24 02:47:57,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-02-24 02:47:57,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.207171314741036) internal successors, (303), 251 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 307 transitions. [2022-02-24 02:47:57,447 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 307 transitions. Word has length 73 [2022-02-24 02:47:57,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:57,447 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 307 transitions. [2022-02-24 02:47:57,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:57,448 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 307 transitions. [2022-02-24 02:47:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:57,448 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:57,448 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:57,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 02:47:57,448 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:57,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1126881173, now seen corresponding path program 15 times [2022-02-24 02:47:57,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:57,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427432262] [2022-02-24 02:47:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:57,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:57,451 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:57,451 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:57,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:57,724 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:57,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427432262] [2022-02-24 02:47:57,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1427432262] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:57,724 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:57,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:47:57,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656496056] [2022-02-24 02:47:57,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:57,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:47:57,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:57,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:47:57,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:47:57,725 INFO L87 Difference]: Start difference. First operand 256 states and 307 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:58,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:58,459 INFO L93 Difference]: Finished difference Result 341 states and 406 transitions. [2022-02-24 02:47:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:47:58,460 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 73 [2022-02-24 02:47:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:58,460 INFO L225 Difference]: With dead ends: 341 [2022-02-24 02:47:58,461 INFO L226 Difference]: Without dead ends: 257 [2022-02-24 02:47:58,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:47:58,461 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 175 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:58,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 84 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:47:58,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-24 02:47:58,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 244. [2022-02-24 02:47:58,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.213389121338912) internal successors, (290), 239 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:58,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 294 transitions. [2022-02-24 02:47:58,616 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 294 transitions. Word has length 73 [2022-02-24 02:47:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:58,616 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 294 transitions. [2022-02-24 02:47:58,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:58,616 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 294 transitions. [2022-02-24 02:47:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:58,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:58,616 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:58,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 02:47:58,616 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:58,617 INFO L85 PathProgramCache]: Analyzing trace with hash 540075159, now seen corresponding path program 16 times [2022-02-24 02:47:58,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:58,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833940820] [2022-02-24 02:47:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:58,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:58,619 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:58,619 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:58,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:58,909 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:58,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833940820] [2022-02-24 02:47:58,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [833940820] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:58,909 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:58,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:47:58,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728757960] [2022-02-24 02:47:58,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:58,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:47:58,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:58,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:47:58,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:47:58,910 INFO L87 Difference]: Start difference. First operand 244 states and 294 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:59,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:59,435 INFO L93 Difference]: Finished difference Result 320 states and 384 transitions. [2022-02-24 02:47:59,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:47:59,436 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 73 [2022-02-24 02:47:59,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:59,437 INFO L225 Difference]: With dead ends: 320 [2022-02-24 02:47:59,437 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 02:47:59,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:47:59,437 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 88 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:59,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 76 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 02:47:59,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-02-24 02:47:59,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.2107438016528926) internal successors, (293), 242 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 297 transitions. [2022-02-24 02:47:59,590 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 297 transitions. Word has length 73 [2022-02-24 02:47:59,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:59,591 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 297 transitions. [2022-02-24 02:47:59,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:59,591 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 297 transitions. [2022-02-24 02:47:59,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:47:59,591 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:59,591 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:59,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 02:47:59,591 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:59,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1751227493, now seen corresponding path program 17 times [2022-02-24 02:47:59,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:59,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031608871] [2022-02-24 02:47:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:59,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:59,594 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:59,594 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:59,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:59,914 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:59,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031608871] [2022-02-24 02:47:59,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1031608871] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:59,914 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:59,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:47:59,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899770326] [2022-02-24 02:47:59,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:59,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:47:59,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:59,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:47:59,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:47:59,915 INFO L87 Difference]: Start difference. First operand 247 states and 297 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:00,806 INFO L93 Difference]: Finished difference Result 344 states and 410 transitions. [2022-02-24 02:48:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:48:00,806 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 02:48:00,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:00,807 INFO L225 Difference]: With dead ends: 344 [2022-02-24 02:48:00,807 INFO L226 Difference]: Without dead ends: 269 [2022-02-24 02:48:00,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:48:00,807 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 169 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:00,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 105 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:48:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-24 02:48:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 253. [2022-02-24 02:48:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.2137096774193548) internal successors, (301), 248 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 305 transitions. [2022-02-24 02:48:00,980 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 305 transitions. Word has length 73 [2022-02-24 02:48:00,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:00,980 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 305 transitions. [2022-02-24 02:48:00,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:00,980 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 305 transitions. [2022-02-24 02:48:00,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:48:00,980 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:00,981 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:00,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 02:48:00,981 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:00,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:00,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2144254503, now seen corresponding path program 18 times [2022-02-24 02:48:00,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:00,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398414450] [2022-02-24 02:48:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:00,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:00,984 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:00,984 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:01,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:01,240 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:01,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398414450] [2022-02-24 02:48:01,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [398414450] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:01,240 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:01,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:48:01,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380378234] [2022-02-24 02:48:01,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:01,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:48:01,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:01,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:48:01,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:48:01,241 INFO L87 Difference]: Start difference. First operand 253 states and 305 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:01,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:01,873 INFO L93 Difference]: Finished difference Result 334 states and 401 transitions. [2022-02-24 02:48:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:48:01,873 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 73 [2022-02-24 02:48:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:01,874 INFO L225 Difference]: With dead ends: 334 [2022-02-24 02:48:01,874 INFO L226 Difference]: Without dead ends: 253 [2022-02-24 02:48:01,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:48:01,875 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 147 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:01,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 89 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:48:01,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-02-24 02:48:02,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-02-24 02:48:02,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.2096774193548387) internal successors, (300), 248 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 304 transitions. [2022-02-24 02:48:02,049 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 304 transitions. Word has length 73 [2022-02-24 02:48:02,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:02,050 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 304 transitions. [2022-02-24 02:48:02,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:02,050 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 304 transitions. [2022-02-24 02:48:02,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:48:02,050 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:02,050 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:02,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 02:48:02,050 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:02,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:02,051 INFO L85 PathProgramCache]: Analyzing trace with hash 854796061, now seen corresponding path program 19 times [2022-02-24 02:48:02,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:02,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312239881] [2022-02-24 02:48:02,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:02,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:02,053 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:02,053 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:02,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:02,364 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:02,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312239881] [2022-02-24 02:48:02,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [312239881] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:02,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:02,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:48:02,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86077704] [2022-02-24 02:48:02,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:02,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:48:02,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:02,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:48:02,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:48:02,365 INFO L87 Difference]: Start difference. First operand 253 states and 304 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:03,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:03,202 INFO L93 Difference]: Finished difference Result 338 states and 404 transitions. [2022-02-24 02:48:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:48:03,203 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 02:48:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:03,203 INFO L225 Difference]: With dead ends: 338 [2022-02-24 02:48:03,203 INFO L226 Difference]: Without dead ends: 257 [2022-02-24 02:48:03,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:48:03,204 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 201 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:03,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 84 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:48:03,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-24 02:48:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 244. [2022-02-24 02:48:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.217573221757322) internal successors, (291), 239 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 295 transitions. [2022-02-24 02:48:03,358 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 295 transitions. Word has length 73 [2022-02-24 02:48:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:03,358 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 295 transitions. [2022-02-24 02:48:03,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 295 transitions. [2022-02-24 02:48:03,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:48:03,359 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:03,360 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:03,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 02:48:03,360 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:03,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:03,360 INFO L85 PathProgramCache]: Analyzing trace with hash 461769051, now seen corresponding path program 20 times [2022-02-24 02:48:03,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:03,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767030555] [2022-02-24 02:48:03,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:03,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:03,364 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:03,364 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:03,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:03,673 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:03,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767030555] [2022-02-24 02:48:03,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1767030555] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:03,673 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:03,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:48:03,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743726527] [2022-02-24 02:48:03,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:03,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:48:03,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:03,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:48:03,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:48:03,674 INFO L87 Difference]: Start difference. First operand 244 states and 295 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:04,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:04,310 INFO L93 Difference]: Finished difference Result 320 states and 386 transitions. [2022-02-24 02:48:04,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:48:04,310 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 73 [2022-02-24 02:48:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:04,311 INFO L225 Difference]: With dead ends: 320 [2022-02-24 02:48:04,311 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 02:48:04,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:48:04,312 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 117 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:04,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 69 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:48:04,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 02:48:04,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-02-24 02:48:04,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.2148760330578512) internal successors, (294), 242 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:04,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 298 transitions. [2022-02-24 02:48:04,468 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 298 transitions. Word has length 73 [2022-02-24 02:48:04,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:04,469 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 298 transitions. [2022-02-24 02:48:04,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:04,469 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 298 transitions. [2022-02-24 02:48:04,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:48:04,469 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:04,469 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:04,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 02:48:04,469 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:04,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:04,470 INFO L85 PathProgramCache]: Analyzing trace with hash -904331431, now seen corresponding path program 21 times [2022-02-24 02:48:04,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:04,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154307114] [2022-02-24 02:48:04,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:04,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:04,472 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:04,472 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:04,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:04,828 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:04,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154307114] [2022-02-24 02:48:04,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1154307114] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:04,828 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:04,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:48:04,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861645393] [2022-02-24 02:48:04,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:04,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:48:04,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:04,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:48:04,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:48:04,829 INFO L87 Difference]: Start difference. First operand 247 states and 298 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:05,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:05,510 INFO L93 Difference]: Finished difference Result 322 states and 387 transitions. [2022-02-24 02:48:05,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:48:05,510 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 73 [2022-02-24 02:48:05,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:05,511 INFO L225 Difference]: With dead ends: 322 [2022-02-24 02:48:05,511 INFO L226 Difference]: Without dead ends: 247 [2022-02-24 02:48:05,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-02-24 02:48:05,512 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 151 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:05,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 77 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:48:05,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-02-24 02:48:05,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2022-02-24 02:48:05,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.2107438016528926) internal successors, (293), 242 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:05,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 297 transitions. [2022-02-24 02:48:05,669 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 297 transitions. Word has length 73 [2022-02-24 02:48:05,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:05,669 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 297 transitions. [2022-02-24 02:48:05,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 297 transitions. [2022-02-24 02:48:05,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:48:05,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:05,670 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:05,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 02:48:05,670 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:05,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:05,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1338593771, now seen corresponding path program 22 times [2022-02-24 02:48:05,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:05,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056077180] [2022-02-24 02:48:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:05,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:05,673 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:05,673 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:05,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:05,991 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:05,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056077180] [2022-02-24 02:48:05,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2056077180] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:05,991 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:05,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:48:05,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732556731] [2022-02-24 02:48:05,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:05,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:48:05,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:05,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:48:05,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:48:05,992 INFO L87 Difference]: Start difference. First operand 247 states and 297 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:06,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:06,747 INFO L93 Difference]: Finished difference Result 323 states and 386 transitions. [2022-02-24 02:48:06,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:48:06,747 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 73 [2022-02-24 02:48:06,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:06,748 INFO L225 Difference]: With dead ends: 323 [2022-02-24 02:48:06,748 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 02:48:06,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:48:06,749 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 165 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:06,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 98 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:48:06,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 02:48:06,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 241. [2022-02-24 02:48:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.2118644067796611) internal successors, (286), 236 states have internal predecessors, (286), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 290 transitions. [2022-02-24 02:48:06,905 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 290 transitions. Word has length 73 [2022-02-24 02:48:06,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:06,906 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 290 transitions. [2022-02-24 02:48:06,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:06,906 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 290 transitions. [2022-02-24 02:48:06,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:48:06,906 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:06,906 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:06,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 02:48:06,906 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:06,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:06,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1925399785, now seen corresponding path program 23 times [2022-02-24 02:48:06,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:06,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48851666] [2022-02-24 02:48:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:06,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:06,909 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:06,909 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:07,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:07,262 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:07,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48851666] [2022-02-24 02:48:07,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [48851666] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:07,262 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:07,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:48:07,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526440558] [2022-02-24 02:48:07,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:07,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:48:07,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:07,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:48:07,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:48:07,263 INFO L87 Difference]: Start difference. First operand 241 states and 290 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:07,906 INFO L93 Difference]: Finished difference Result 314 states and 376 transitions. [2022-02-24 02:48:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:48:07,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 73 [2022-02-24 02:48:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:07,907 INFO L225 Difference]: With dead ends: 314 [2022-02-24 02:48:07,907 INFO L226 Difference]: Without dead ends: 245 [2022-02-24 02:48:07,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:48:07,908 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 117 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:07,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 74 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:48:07,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-24 02:48:08,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2022-02-24 02:48:08,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.209205020920502) internal successors, (289), 239 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:08,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 293 transitions. [2022-02-24 02:48:08,077 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 293 transitions. Word has length 73 [2022-02-24 02:48:08,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:08,077 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 293 transitions. [2022-02-24 02:48:08,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 293 transitions. [2022-02-24 02:48:08,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:48:08,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:08,078 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:08,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 02:48:08,078 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:08,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:08,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1701692123, now seen corresponding path program 24 times [2022-02-24 02:48:08,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:08,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36433167] [2022-02-24 02:48:08,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:08,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:08,081 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:08,081 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:08,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:08,423 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:08,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36433167] [2022-02-24 02:48:08,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [36433167] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:08,423 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:08,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:48:08,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39794504] [2022-02-24 02:48:08,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:08,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:48:08,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:08,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:48:08,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:48:08,424 INFO L87 Difference]: Start difference. First operand 244 states and 293 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:09,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:09,147 INFO L93 Difference]: Finished difference Result 320 states and 382 transitions. [2022-02-24 02:48:09,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:48:09,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 02:48:09,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:09,148 INFO L225 Difference]: With dead ends: 320 [2022-02-24 02:48:09,148 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 02:48:09,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:48:09,149 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 88 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:09,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 91 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:48:09,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 02:48:09,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-02-24 02:48:09,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.2066115702479339) internal successors, (292), 242 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:09,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 296 transitions. [2022-02-24 02:48:09,321 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 296 transitions. Word has length 73 [2022-02-24 02:48:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:09,321 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 296 transitions. [2022-02-24 02:48:09,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 296 transitions. [2022-02-24 02:48:09,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:48:09,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:09,322 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:09,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 02:48:09,322 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:09,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:09,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1660456793, now seen corresponding path program 25 times [2022-02-24 02:48:09,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:09,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811671830] [2022-02-24 02:48:09,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:09,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:09,324 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:09,324 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:09,598 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:09,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811671830] [2022-02-24 02:48:09,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [811671830] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:09,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:09,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:48:09,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083950307] [2022-02-24 02:48:09,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:09,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:48:09,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:09,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:48:09,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:48:09,599 INFO L87 Difference]: Start difference. First operand 247 states and 296 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:10,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:10,510 INFO L93 Difference]: Finished difference Result 330 states and 393 transitions. [2022-02-24 02:48:10,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:48:10,510 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 02:48:10,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:10,511 INFO L225 Difference]: With dead ends: 330 [2022-02-24 02:48:10,511 INFO L226 Difference]: Without dead ends: 255 [2022-02-24 02:48:10,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:48:10,512 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 183 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:10,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 102 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:48:10,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-24 02:48:10,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 247. [2022-02-24 02:48:10,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.2066115702479339) internal successors, (292), 242 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:10,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 296 transitions. [2022-02-24 02:48:10,671 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 296 transitions. Word has length 73 [2022-02-24 02:48:10,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:10,671 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 296 transitions. [2022-02-24 02:48:10,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:10,671 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 296 transitions. [2022-02-24 02:48:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:48:10,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:10,672 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:10,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 02:48:10,672 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:10,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1267429783, now seen corresponding path program 26 times [2022-02-24 02:48:10,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:10,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082119300] [2022-02-24 02:48:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:10,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:10,674 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:10,674 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:11,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:11,052 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:11,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082119300] [2022-02-24 02:48:11,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1082119300] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:11,052 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:11,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:48:11,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798642138] [2022-02-24 02:48:11,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:11,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:48:11,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:11,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:48:11,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:48:11,053 INFO L87 Difference]: Start difference. First operand 247 states and 296 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:11,858 INFO L93 Difference]: Finished difference Result 326 states and 388 transitions. [2022-02-24 02:48:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:48:11,858 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 73 [2022-02-24 02:48:11,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:11,859 INFO L225 Difference]: With dead ends: 326 [2022-02-24 02:48:11,859 INFO L226 Difference]: Without dead ends: 251 [2022-02-24 02:48:11,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:48:11,860 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 117 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:11,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 84 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:48:11,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-02-24 02:48:12,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2022-02-24 02:48:12,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.2040816326530612) internal successors, (295), 245 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:12,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 299 transitions. [2022-02-24 02:48:12,024 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 299 transitions. Word has length 73 [2022-02-24 02:48:12,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:12,024 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 299 transitions. [2022-02-24 02:48:12,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 299 transitions. [2022-02-24 02:48:12,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:48:12,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:12,025 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:12,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 02:48:12,025 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:12,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:12,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1073650779, now seen corresponding path program 27 times [2022-02-24 02:48:12,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:12,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274046758] [2022-02-24 02:48:12,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:12,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:12,028 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:12,028 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:12,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:12,450 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:12,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274046758] [2022-02-24 02:48:12,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1274046758] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:12,450 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:12,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:48:12,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077636949] [2022-02-24 02:48:12,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:12,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:48:12,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:12,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:48:12,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:48:12,450 INFO L87 Difference]: Start difference. First operand 250 states and 299 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:13,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:13,484 INFO L93 Difference]: Finished difference Result 386 states and 454 transitions. [2022-02-24 02:48:13,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:48:13,484 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 02:48:13,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:13,485 INFO L225 Difference]: With dead ends: 386 [2022-02-24 02:48:13,485 INFO L226 Difference]: Without dead ends: 308 [2022-02-24 02:48:13,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:48:13,486 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 109 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:13,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 105 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:48:13,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-24 02:48:13,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 271. [2022-02-24 02:48:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.2105263157894737) internal successors, (322), 266 states have internal predecessors, (322), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 326 transitions. [2022-02-24 02:48:13,674 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 326 transitions. Word has length 73 [2022-02-24 02:48:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:13,674 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 326 transitions. [2022-02-24 02:48:13,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:13,674 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 326 transitions. [2022-02-24 02:48:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:48:13,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:13,674 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:13,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 02:48:13,675 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:13,675 INFO L85 PathProgramCache]: Analyzing trace with hash 680623769, now seen corresponding path program 28 times [2022-02-24 02:48:13,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:13,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151909541] [2022-02-24 02:48:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:13,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:13,677 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:13,677 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:13,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:13,821 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:13,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151909541] [2022-02-24 02:48:13,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1151909541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:13,821 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:13,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:48:13,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915801386] [2022-02-24 02:48:13,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:13,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:48:13,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:13,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:48:13,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:48:13,822 INFO L87 Difference]: Start difference. First operand 271 states and 326 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 02:48:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:14,165 INFO L93 Difference]: Finished difference Result 407 states and 491 transitions. [2022-02-24 02:48:14,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:48:14,165 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 73 [2022-02-24 02:48:14,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:14,166 INFO L225 Difference]: With dead ends: 407 [2022-02-24 02:48:14,166 INFO L226 Difference]: Without dead ends: 269 [2022-02-24 02:48:14,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:48:14,167 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 66 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:14,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 55 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:48:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-24 02:48:14,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2022-02-24 02:48:14,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.2083333333333333) internal successors, (319), 264 states have internal predecessors, (319), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 323 transitions. [2022-02-24 02:48:14,346 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 323 transitions. Word has length 73 [2022-02-24 02:48:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:14,347 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 323 transitions. [2022-02-24 02:48:14,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 02:48:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 323 transitions. [2022-02-24 02:48:14,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 02:48:14,347 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:14,347 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:14,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 02:48:14,347 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:14,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:14,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1813973492, now seen corresponding path program 1 times [2022-02-24 02:48:14,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:14,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941128133] [2022-02-24 02:48:14,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:14,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:14,350 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:14,350 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:14,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:14,399 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:14,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941128133] [2022-02-24 02:48:14,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [941128133] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:14,400 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:14,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:48:14,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190754228] [2022-02-24 02:48:14,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:14,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:48:14,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:14,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:48:14,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:48:14,400 INFO L87 Difference]: Start difference. First operand 269 states and 323 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 02:48:15,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:15,385 INFO L93 Difference]: Finished difference Result 1281 states and 1560 transitions. [2022-02-24 02:48:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 02:48:15,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 75 [2022-02-24 02:48:15,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:15,388 INFO L225 Difference]: With dead ends: 1281 [2022-02-24 02:48:15,388 INFO L226 Difference]: Without dead ends: 1147 [2022-02-24 02:48:15,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:48:15,389 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 142 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:15,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 56 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:48:15,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-02-24 02:48:15,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 275. [2022-02-24 02:48:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.211111111111111) internal successors, (327), 270 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:15,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 331 transitions. [2022-02-24 02:48:15,614 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 331 transitions. Word has length 75 [2022-02-24 02:48:15,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:15,614 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 331 transitions. [2022-02-24 02:48:15,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 02:48:15,614 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 331 transitions. [2022-02-24 02:48:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 02:48:15,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:15,615 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:15,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 02:48:15,615 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:15,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1665765482, now seen corresponding path program 2 times [2022-02-24 02:48:15,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:15,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297301888] [2022-02-24 02:48:15,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:15,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:15,617 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:15,617 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:15,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:15,683 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:15,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297301888] [2022-02-24 02:48:15,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1297301888] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:15,683 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:15,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 02:48:15,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535965067] [2022-02-24 02:48:15,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:15,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 02:48:15,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:15,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 02:48:15,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:48:15,684 INFO L87 Difference]: Start difference. First operand 275 states and 331 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 02:48:16,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:16,930 INFO L93 Difference]: Finished difference Result 1314 states and 1603 transitions. [2022-02-24 02:48:16,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 02:48:16,930 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 79 [2022-02-24 02:48:16,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:16,933 INFO L225 Difference]: With dead ends: 1314 [2022-02-24 02:48:16,933 INFO L226 Difference]: Without dead ends: 1180 [2022-02-24 02:48:16,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:48:16,933 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 131 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:16,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 104 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:48:16,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-02-24 02:48:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 277. [2022-02-24 02:48:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.213235294117647) internal successors, (330), 272 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:17,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 334 transitions. [2022-02-24 02:48:17,161 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 334 transitions. Word has length 79 [2022-02-24 02:48:17,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:17,161 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 334 transitions. [2022-02-24 02:48:17,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 02:48:17,161 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 334 transitions. [2022-02-24 02:48:17,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-24 02:48:17,162 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:17,162 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:17,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 02:48:17,162 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:17,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:17,162 INFO L85 PathProgramCache]: Analyzing trace with hash -652612731, now seen corresponding path program 3 times [2022-02-24 02:48:17,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:17,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622090099] [2022-02-24 02:48:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:17,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:17,164 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:17,164 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:17,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:17,236 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:17,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622090099] [2022-02-24 02:48:17,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1622090099] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:17,236 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:17,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:48:17,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435072848] [2022-02-24 02:48:17,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:17,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:48:17,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:17,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:48:17,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:48:17,236 INFO L87 Difference]: Start difference. First operand 277 states and 334 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:18,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:18,801 INFO L93 Difference]: Finished difference Result 1550 states and 1893 transitions. [2022-02-24 02:48:18,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:48:18,801 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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 81 [2022-02-24 02:48:18,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:18,804 INFO L225 Difference]: With dead ends: 1550 [2022-02-24 02:48:18,804 INFO L226 Difference]: Without dead ends: 1416 [2022-02-24 02:48:18,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:48:18,805 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 175 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:18,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 123 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:48:18,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-02-24 02:48:19,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 279. [2022-02-24 02:48:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.2153284671532847) internal successors, (333), 274 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 337 transitions. [2022-02-24 02:48:19,046 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 337 transitions. Word has length 81 [2022-02-24 02:48:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:19,046 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 337 transitions. [2022-02-24 02:48:19,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 337 transitions. [2022-02-24 02:48:19,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 02:48:19,046 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:19,046 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:19,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 02:48:19,047 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:19,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:19,047 INFO L85 PathProgramCache]: Analyzing trace with hash 473951200, now seen corresponding path program 4 times [2022-02-24 02:48:19,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:19,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565840155] [2022-02-24 02:48:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:19,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:19,049 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:19,049 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:19,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:19,125 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:19,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565840155] [2022-02-24 02:48:19,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1565840155] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:19,126 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:19,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:48:19,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487477050] [2022-02-24 02:48:19,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:19,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:48:19,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:19,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:48:19,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:48:19,126 INFO L87 Difference]: Start difference. First operand 279 states and 337 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 02:48:21,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:21,054 INFO L93 Difference]: Finished difference Result 1786 states and 2183 transitions. [2022-02-24 02:48:21,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 02:48:21,054 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 83 [2022-02-24 02:48:21,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:21,058 INFO L225 Difference]: With dead ends: 1786 [2022-02-24 02:48:21,058 INFO L226 Difference]: Without dead ends: 1652 [2022-02-24 02:48:21,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:48:21,059 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 205 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:21,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 147 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:48:21,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2022-02-24 02:48:21,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 281. [2022-02-24 02:48:21,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.2173913043478262) internal successors, (336), 276 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 340 transitions. [2022-02-24 02:48:21,324 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 340 transitions. Word has length 83 [2022-02-24 02:48:21,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:21,324 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 340 transitions. [2022-02-24 02:48:21,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 02:48:21,324 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 340 transitions. [2022-02-24 02:48:21,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 02:48:21,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:21,324 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 7, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:21,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 02:48:21,324 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:21,325 INFO L85 PathProgramCache]: Analyzing trace with hash 770130299, now seen corresponding path program 5 times [2022-02-24 02:48:21,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:21,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155943697] [2022-02-24 02:48:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:21,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:21,327 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:21,327 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:21,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:21,436 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:21,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155943697] [2022-02-24 02:48:21,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1155943697] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:21,436 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:21,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:48:21,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610820065] [2022-02-24 02:48:21,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:21,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:48:21,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:21,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:48:21,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:48:21,437 INFO L87 Difference]: Start difference. First operand 281 states and 340 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 02:48:23,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:23,795 INFO L93 Difference]: Finished difference Result 2022 states and 2473 transitions. [2022-02-24 02:48:23,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:48:23,795 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 85 [2022-02-24 02:48:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:23,799 INFO L225 Difference]: With dead ends: 2022 [2022-02-24 02:48:23,799 INFO L226 Difference]: Without dead ends: 1888 [2022-02-24 02:48:23,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:48:23,800 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 235 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:23,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 171 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:48:23,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2022-02-24 02:48:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 283. [2022-02-24 02:48:24,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.2194244604316546) internal successors, (339), 278 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:24,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 343 transitions. [2022-02-24 02:48:24,071 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 343 transitions. Word has length 85 [2022-02-24 02:48:24,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:24,071 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 343 transitions. [2022-02-24 02:48:24,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 02:48:24,071 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 343 transitions. [2022-02-24 02:48:24,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-24 02:48:24,071 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:24,071 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 7, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:24,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 02:48:24,072 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:24,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:24,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1930402902, now seen corresponding path program 6 times [2022-02-24 02:48:24,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:24,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621134441] [2022-02-24 02:48:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:24,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:24,074 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:24,074 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:24,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:24,190 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:24,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621134441] [2022-02-24 02:48:24,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1621134441] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:24,190 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:24,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:48:24,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172235099] [2022-02-24 02:48:24,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:24,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:48:24,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:24,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:48:24,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:48:24,190 INFO L87 Difference]: Start difference. First operand 283 states and 343 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:26,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:26,998 INFO L93 Difference]: Finished difference Result 2258 states and 2763 transitions. [2022-02-24 02:48:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:48:26,999 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have 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 02:48:26,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:27,003 INFO L225 Difference]: With dead ends: 2258 [2022-02-24 02:48:27,003 INFO L226 Difference]: Without dead ends: 2124 [2022-02-24 02:48:27,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:48:27,004 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 265 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:27,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 195 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:48:27,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2022-02-24 02:48:27,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 285. [2022-02-24 02:48:27,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.2214285714285715) internal successors, (342), 280 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:27,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 346 transitions. [2022-02-24 02:48:27,280 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 346 transitions. Word has length 87 [2022-02-24 02:48:27,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:27,280 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 346 transitions. [2022-02-24 02:48:27,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 346 transitions. [2022-02-24 02:48:27,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 02:48:27,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:27,281 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:27,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 02:48:27,281 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:27,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:27,282 INFO L85 PathProgramCache]: Analyzing trace with hash 260877425, now seen corresponding path program 7 times [2022-02-24 02:48:27,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:27,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76347973] [2022-02-24 02:48:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:27,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:27,284 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:27,284 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:27,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:27,401 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:27,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76347973] [2022-02-24 02:48:27,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [76347973] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:27,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:27,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:48:27,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570578862] [2022-02-24 02:48:27,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:27,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:48:27,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:27,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:48:27,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:48:27,401 INFO L87 Difference]: Start difference. First operand 285 states and 346 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:30,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:30,761 INFO L93 Difference]: Finished difference Result 2494 states and 3053 transitions. [2022-02-24 02:48:30,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:48:30,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 89 [2022-02-24 02:48:30,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:30,767 INFO L225 Difference]: With dead ends: 2494 [2022-02-24 02:48:30,767 INFO L226 Difference]: Without dead ends: 2360 [2022-02-24 02:48:30,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:48:30,768 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 281 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:30,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 224 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:48:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2022-02-24 02:48:31,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 287. [2022-02-24 02:48:31,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.2234042553191489) internal successors, (345), 282 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:31,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 349 transitions. [2022-02-24 02:48:31,068 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 349 transitions. Word has length 89 [2022-02-24 02:48:31,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:31,068 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 349 transitions. [2022-02-24 02:48:31,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:31,069 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 349 transitions. [2022-02-24 02:48:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-24 02:48:31,069 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:31,069 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:31,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 02:48:31,069 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:31,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:31,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2130304564, now seen corresponding path program 8 times [2022-02-24 02:48:31,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:31,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965423145] [2022-02-24 02:48:31,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:31,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:31,072 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:31,072 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:31,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:31,188 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:31,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965423145] [2022-02-24 02:48:31,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1965423145] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:31,188 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:31,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:48:31,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902372651] [2022-02-24 02:48:31,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:31,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:48:31,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:31,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:48:31,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:48:31,189 INFO L87 Difference]: Start difference. First operand 287 states and 349 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 02:48:35,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:35,079 INFO L93 Difference]: Finished difference Result 2730 states and 3343 transitions. [2022-02-24 02:48:35,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:48:35,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 91 [2022-02-24 02:48:35,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:35,086 INFO L225 Difference]: With dead ends: 2730 [2022-02-24 02:48:35,086 INFO L226 Difference]: Without dead ends: 2596 [2022-02-24 02:48:35,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:48:35,087 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 325 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2154 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:35,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 243 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2154 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:48:35,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2022-02-24 02:48:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 289. [2022-02-24 02:48:35,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.2253521126760563) internal successors, (348), 284 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:35,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 352 transitions. [2022-02-24 02:48:35,405 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 352 transitions. Word has length 91 [2022-02-24 02:48:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:35,406 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 352 transitions. [2022-02-24 02:48:35,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 02:48:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 352 transitions. [2022-02-24 02:48:35,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 02:48:35,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:35,406 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:35,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-24 02:48:35,406 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:35,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:35,407 INFO L85 PathProgramCache]: Analyzing trace with hash 2046274663, now seen corresponding path program 9 times [2022-02-24 02:48:35,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:35,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924840101] [2022-02-24 02:48:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:35,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:35,409 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:35,409 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:35,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:35,563 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:35,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924840101] [2022-02-24 02:48:35,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [924840101] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:35,563 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:35,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:48:35,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826893174] [2022-02-24 02:48:35,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:35,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:48:35,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:35,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:48:35,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:48:35,564 INFO L87 Difference]: Start difference. First operand 289 states and 352 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:40,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:40,096 INFO L93 Difference]: Finished difference Result 2966 states and 3633 transitions. [2022-02-24 02:48:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:48:40,096 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 93 [2022-02-24 02:48:40,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:40,106 INFO L225 Difference]: With dead ends: 2966 [2022-02-24 02:48:40,106 INFO L226 Difference]: Without dead ends: 2832 [2022-02-24 02:48:40,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-24 02:48:40,106 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 355 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2618 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:40,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 267 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2618 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:48:40,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2022-02-24 02:48:40,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 291. [2022-02-24 02:48:40,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.2272727272727273) internal successors, (351), 286 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:40,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 355 transitions. [2022-02-24 02:48:40,444 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 355 transitions. Word has length 93 [2022-02-24 02:48:40,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:40,444 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 355 transitions. [2022-02-24 02:48:40,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:40,444 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 355 transitions. [2022-02-24 02:48:40,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-24 02:48:40,444 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:40,445 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 10, 10, 10, 10, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:40,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-24 02:48:40,445 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:40,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:40,445 INFO L85 PathProgramCache]: Analyzing trace with hash -55509950, now seen corresponding path program 10 times [2022-02-24 02:48:40,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:40,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543518884] [2022-02-24 02:48:40,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:40,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:40,447 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:40,448 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:40,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:40,589 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:40,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543518884] [2022-02-24 02:48:40,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [543518884] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:40,589 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:40,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:48:40,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020558282] [2022-02-24 02:48:40,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:40,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:48:40,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:40,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:48:40,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:48:40,590 INFO L87 Difference]: Start difference. First operand 291 states and 355 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:45,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:45,887 INFO L93 Difference]: Finished difference Result 3202 states and 3923 transitions. [2022-02-24 02:48:45,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:48:45,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 95 [2022-02-24 02:48:45,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:45,892 INFO L225 Difference]: With dead ends: 3202 [2022-02-24 02:48:45,892 INFO L226 Difference]: Without dead ends: 3068 [2022-02-24 02:48:45,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:48:45,893 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 371 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3381 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 3399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:45,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 296 Invalid, 3399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3381 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:48:45,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3068 states. [2022-02-24 02:48:46,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3068 to 293. [2022-02-24 02:48:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.2291666666666667) internal successors, (354), 288 states have internal predecessors, (354), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:46,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 358 transitions. [2022-02-24 02:48:46,256 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 358 transitions. Word has length 95 [2022-02-24 02:48:46,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:46,256 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 358 transitions. [2022-02-24 02:48:46,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:46,256 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 358 transitions. [2022-02-24 02:48:46,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-24 02:48:46,257 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:46,257 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 10, 10, 10, 10, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:46,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-24 02:48:46,257 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:46,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:46,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1235893923, now seen corresponding path program 11 times [2022-02-24 02:48:46,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:46,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499832687] [2022-02-24 02:48:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:46,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:46,260 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:46,260 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:46,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:46,417 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:46,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499832687] [2022-02-24 02:48:46,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1499832687] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:46,417 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:46,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:48:46,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939586397] [2022-02-24 02:48:46,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:46,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:48:46,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:46,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:48:46,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:48:46,417 INFO L87 Difference]: Start difference. First operand 293 states and 358 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:52,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:52,452 INFO L93 Difference]: Finished difference Result 3438 states and 4213 transitions. [2022-02-24 02:48:52,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:48:52,452 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 97 [2022-02-24 02:48:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:52,457 INFO L225 Difference]: With dead ends: 3438 [2022-02-24 02:48:52,457 INFO L226 Difference]: Without dead ends: 3304 [2022-02-24 02:48:52,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:48:52,458 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 415 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3684 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 3703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:52,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 315 Invalid, 3703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3684 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 02:48:52,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2022-02-24 02:48:52,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 295. [2022-02-24 02:48:52,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.2310344827586206) internal successors, (357), 290 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 361 transitions. [2022-02-24 02:48:52,846 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 361 transitions. Word has length 97 [2022-02-24 02:48:52,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:52,846 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 361 transitions. [2022-02-24 02:48:52,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:52,846 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 361 transitions. [2022-02-24 02:48:52,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-24 02:48:52,846 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:52,846 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 10, 10, 10, 10, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:48:52,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-24 02:48:52,847 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:52,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:52,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1713525832, now seen corresponding path program 12 times [2022-02-24 02:48:52,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:52,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363441259] [2022-02-24 02:48:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:52,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:52,849 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:52,849 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:53,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:53,017 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:53,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363441259] [2022-02-24 02:48:53,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [363441259] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:53,017 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:53,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:48:53,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180275816] [2022-02-24 02:48:53,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:53,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:48:53,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:53,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:48:53,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:48:53,018 INFO L87 Difference]: Start difference. First operand 295 states and 361 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:59,946 INFO L93 Difference]: Finished difference Result 3674 states and 4503 transitions. [2022-02-24 02:48:59,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 02:48:59,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 99 [2022-02-24 02:48:59,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:59,951 INFO L225 Difference]: With dead ends: 3674 [2022-02-24 02:48:59,951 INFO L226 Difference]: Without dead ends: 3540 [2022-02-24 02:48:59,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 02:48:59,952 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 445 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 4286 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 4306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 4286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:59,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 339 Invalid, 4306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 4286 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 02:48:59,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3540 states. [2022-02-24 02:49:00,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3540 to 297. [2022-02-24 02:49:00,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.2328767123287672) internal successors, (360), 292 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:00,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 364 transitions. [2022-02-24 02:49:00,366 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 364 transitions. Word has length 99 [2022-02-24 02:49:00,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:00,366 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 364 transitions. [2022-02-24 02:49:00,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:00,366 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 364 transitions. [2022-02-24 02:49:00,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-24 02:49:00,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:00,366 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 10, 10, 10, 10, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:00,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-24 02:49:00,367 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:00,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:00,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1156289709, now seen corresponding path program 13 times [2022-02-24 02:49:00,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:00,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877536358] [2022-02-24 02:49:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:00,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:00,369 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:00,369 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:00,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:00,559 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:00,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877536358] [2022-02-24 02:49:00,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1877536358] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:00,559 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:00,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:49:00,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832347109] [2022-02-24 02:49:00,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:00,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:49:00,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:00,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:49:00,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:49:00,560 INFO L87 Difference]: Start difference. First operand 297 states and 364 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:08,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:08,442 INFO L93 Difference]: Finished difference Result 3910 states and 4793 transitions. [2022-02-24 02:49:08,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 02:49:08,444 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 101 [2022-02-24 02:49:08,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:08,449 INFO L225 Difference]: With dead ends: 3910 [2022-02-24 02:49:08,449 INFO L226 Difference]: Without dead ends: 3776 [2022-02-24 02:49:08,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 02:49:08,450 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 486 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4765 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 4787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:08,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 351 Invalid, 4787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4765 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 02:49:08,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2022-02-24 02:49:08,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 299. [2022-02-24 02:49:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.2346938775510203) internal successors, (363), 294 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 367 transitions. [2022-02-24 02:49:08,904 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 367 transitions. Word has length 101 [2022-02-24 02:49:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:08,904 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 367 transitions. [2022-02-24 02:49:08,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 367 transitions. [2022-02-24 02:49:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:49:08,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:08,905 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:08,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-24 02:49:08,905 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:08,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:08,905 INFO L85 PathProgramCache]: Analyzing trace with hash -30786810, now seen corresponding path program 1 times [2022-02-24 02:49:08,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:08,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709401849] [2022-02-24 02:49:08,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:08,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:08,914 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:08,914 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:09,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:09,476 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:09,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709401849] [2022-02-24 02:49:09,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [709401849] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:09,476 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:09,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:49:09,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779699310] [2022-02-24 02:49:09,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:09,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:49:09,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:09,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:49:09,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:49:09,478 INFO L87 Difference]: Start difference. First operand 299 states and 367 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:11,166 INFO L93 Difference]: Finished difference Result 877 states and 1059 transitions. [2022-02-24 02:49:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:49:11,166 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 02:49:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:11,167 INFO L225 Difference]: With dead ends: 877 [2022-02-24 02:49:11,167 INFO L226 Difference]: Without dead ends: 778 [2022-02-24 02:49:11,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:49:11,168 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 205 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:11,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 61 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:49:11,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-02-24 02:49:11,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 382. [2022-02-24 02:49:11,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 377 states have (on average 1.2281167108753315) internal successors, (463), 377 states have internal predecessors, (463), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:11,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 467 transitions. [2022-02-24 02:49:11,754 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 467 transitions. Word has length 102 [2022-02-24 02:49:11,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:11,754 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 467 transitions. [2022-02-24 02:49:11,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:11,754 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 467 transitions. [2022-02-24 02:49:11,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:49:11,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:11,755 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:11,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-24 02:49:11,755 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:11,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:11,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1765297018, now seen corresponding path program 2 times [2022-02-24 02:49:11,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:11,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687301207] [2022-02-24 02:49:11,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:11,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:11,758 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:11,758 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:12,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:12,230 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:12,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687301207] [2022-02-24 02:49:12,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1687301207] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:12,230 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:12,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 02:49:12,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784243921] [2022-02-24 02:49:12,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:12,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 02:49:12,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:12,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 02:49:12,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:49:12,231 INFO L87 Difference]: Start difference. First operand 382 states and 467 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:14,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:14,037 INFO L93 Difference]: Finished difference Result 722 states and 867 transitions. [2022-02-24 02:49:14,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 02:49:14,038 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 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 102 [2022-02-24 02:49:14,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:14,039 INFO L225 Difference]: With dead ends: 722 [2022-02-24 02:49:14,039 INFO L226 Difference]: Without dead ends: 623 [2022-02-24 02:49:14,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 02:49:14,040 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 124 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:14,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 67 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:49:14,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-02-24 02:49:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 563. [2022-02-24 02:49:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 558 states have (on average 1.2168458781362008) internal successors, (679), 558 states have internal predecessors, (679), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 683 transitions. [2022-02-24 02:49:14,949 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 683 transitions. Word has length 102 [2022-02-24 02:49:14,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:14,949 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 683 transitions. [2022-02-24 02:49:14,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 683 transitions. [2022-02-24 02:49:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:49:14,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:14,950 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:14,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-24 02:49:14,950 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:14,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:14,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1879648578, now seen corresponding path program 3 times [2022-02-24 02:49:14,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:14,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093829135] [2022-02-24 02:49:14,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:14,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:14,953 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:14,953 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:15,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:15,599 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:15,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093829135] [2022-02-24 02:49:15,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2093829135] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:15,599 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:15,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:49:15,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719166024] [2022-02-24 02:49:15,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:15,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:49:15,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:15,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:49:15,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:49:15,600 INFO L87 Difference]: Start difference. First operand 563 states and 683 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 02:49:17,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:17,951 INFO L93 Difference]: Finished difference Result 1195 states and 1436 transitions. [2022-02-24 02:49:17,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:49:17,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 102 [2022-02-24 02:49:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:17,953 INFO L225 Difference]: With dead ends: 1195 [2022-02-24 02:49:17,953 INFO L226 Difference]: Without dead ends: 1084 [2022-02-24 02:49:17,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:49:17,954 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 250 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:17,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 61 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:49:17,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-02-24 02:49:18,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 587. [2022-02-24 02:49:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 582 states have (on average 1.2147766323024054) internal successors, (707), 582 states have internal predecessors, (707), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:18,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 711 transitions. [2022-02-24 02:49:18,915 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 711 transitions. Word has length 102 [2022-02-24 02:49:18,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:18,915 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 711 transitions. [2022-02-24 02:49:18,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 02:49:18,915 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 711 transitions. [2022-02-24 02:49:18,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:49:18,916 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:18,916 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:18,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-24 02:49:18,916 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:18,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:18,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1801342470, now seen corresponding path program 4 times [2022-02-24 02:49:18,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:18,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479245016] [2022-02-24 02:49:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:18,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:18,919 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:18,919 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:19,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:19,508 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:19,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479245016] [2022-02-24 02:49:19,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479245016] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:19,508 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:19,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 02:49:19,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030325719] [2022-02-24 02:49:19,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:19,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 02:49:19,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:19,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 02:49:19,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:49:19,509 INFO L87 Difference]: Start difference. First operand 587 states and 711 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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 02:49:21,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:21,954 INFO L93 Difference]: Finished difference Result 836 states and 989 transitions. [2022-02-24 02:49:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 02:49:21,954 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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 102 [2022-02-24 02:49:21,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:21,955 INFO L225 Difference]: With dead ends: 836 [2022-02-24 02:49:21,955 INFO L226 Difference]: Without dead ends: 725 [2022-02-24 02:49:21,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=2331, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 02:49:21,956 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 126 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:21,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 90 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:49:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-02-24 02:49:22,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 605. [2022-02-24 02:49:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 600 states have (on average 1.2116666666666667) internal successors, (727), 600 states have internal predecessors, (727), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 731 transitions. [2022-02-24 02:49:22,957 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 731 transitions. Word has length 102 [2022-02-24 02:49:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:22,957 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 731 transitions. [2022-02-24 02:49:22,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 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 02:49:22,957 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 731 transitions. [2022-02-24 02:49:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:49:22,958 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:22,958 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:22,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-24 02:49:22,958 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:22,959 INFO L85 PathProgramCache]: Analyzing trace with hash -585826366, now seen corresponding path program 5 times [2022-02-24 02:49:22,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:22,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757902547] [2022-02-24 02:49:22,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:22,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:22,965 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:22,965 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:23,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:23,575 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:23,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757902547] [2022-02-24 02:49:23,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [757902547] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:23,575 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:23,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 02:49:23,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462383077] [2022-02-24 02:49:23,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:23,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 02:49:23,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:23,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 02:49:23,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:49:23,576 INFO L87 Difference]: Start difference. First operand 605 states and 731 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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 02:49:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:26,376 INFO L93 Difference]: Finished difference Result 884 states and 1039 transitions. [2022-02-24 02:49:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 02:49:26,377 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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 102 [2022-02-24 02:49:26,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:26,378 INFO L225 Difference]: With dead ends: 884 [2022-02-24 02:49:26,378 INFO L226 Difference]: Without dead ends: 761 [2022-02-24 02:49:26,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=351, Invalid=2841, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 02:49:26,379 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 128 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:26,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 89 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:49:26,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-02-24 02:49:27,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 611. [2022-02-24 02:49:27,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 606 states have (on average 1.2095709570957096) internal successors, (733), 606 states have internal predecessors, (733), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:27,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 737 transitions. [2022-02-24 02:49:27,386 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 737 transitions. Word has length 102 [2022-02-24 02:49:27,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:27,387 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 737 transitions. [2022-02-24 02:49:27,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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 02:49:27,387 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 737 transitions. [2022-02-24 02:49:27,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:49:27,387 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:27,388 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:27,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-24 02:49:27,388 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:27,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:27,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1253701754, now seen corresponding path program 6 times [2022-02-24 02:49:27,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:27,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931053732] [2022-02-24 02:49:27,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:27,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:27,391 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:27,391 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:28,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:28,058 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:28,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931053732] [2022-02-24 02:49:28,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1931053732] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:28,058 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:28,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 02:49:28,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482663590] [2022-02-24 02:49:28,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:28,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 02:49:28,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:28,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 02:49:28,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:49:28,059 INFO L87 Difference]: Start difference. First operand 611 states and 737 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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 02:49:31,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:31,798 INFO L93 Difference]: Finished difference Result 1420 states and 1668 transitions. [2022-02-24 02:49:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 02:49:31,798 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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 102 [2022-02-24 02:49:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:31,809 INFO L225 Difference]: With dead ends: 1420 [2022-02-24 02:49:31,809 INFO L226 Difference]: Without dead ends: 1103 [2022-02-24 02:49:31,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=381, Invalid=3401, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 02:49:31,810 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 134 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 2340 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:31,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 118 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2340 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:49:31,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-02-24 02:49:33,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 971. [2022-02-24 02:49:33,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 966 states have (on average 1.1956521739130435) internal successors, (1155), 966 states have internal predecessors, (1155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1159 transitions. [2022-02-24 02:49:33,532 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1159 transitions. Word has length 102 [2022-02-24 02:49:33,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:33,532 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1159 transitions. [2022-02-24 02:49:33,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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 02:49:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1159 transitions. [2022-02-24 02:49:33,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:49:33,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:33,534 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:33,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-24 02:49:33,534 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:33,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:33,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1687964094, now seen corresponding path program 7 times [2022-02-24 02:49:33,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:33,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525074984] [2022-02-24 02:49:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:33,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:33,537 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:33,537 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:33,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:33,988 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:33,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525074984] [2022-02-24 02:49:33,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [525074984] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:33,988 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:33,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:49:33,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22758257] [2022-02-24 02:49:33,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:33,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:49:33,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:33,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:49:33,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:49:33,989 INFO L87 Difference]: Start difference. First operand 971 states and 1159 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 02:49:36,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:36,577 INFO L93 Difference]: Finished difference Result 1507 states and 1782 transitions. [2022-02-24 02:49:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:49:36,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 102 [2022-02-24 02:49:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:36,579 INFO L225 Difference]: With dead ends: 1507 [2022-02-24 02:49:36,579 INFO L226 Difference]: Without dead ends: 1154 [2022-02-24 02:49:36,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:49:36,580 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 58 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:36,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 95 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:49:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-02-24 02:49:38,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 980. [2022-02-24 02:49:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 975 states have (on average 1.2071794871794872) internal successors, (1177), 975 states have internal predecessors, (1177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1181 transitions. [2022-02-24 02:49:38,375 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1181 transitions. Word has length 102 [2022-02-24 02:49:38,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:38,375 INFO L470 AbstractCegarLoop]: Abstraction has 980 states and 1181 transitions. [2022-02-24 02:49:38,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 02:49:38,375 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1181 transitions. [2022-02-24 02:49:38,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:49:38,376 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:38,376 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:38,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-24 02:49:38,376 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:38,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:38,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2020197188, now seen corresponding path program 8 times [2022-02-24 02:49:38,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:38,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795076264] [2022-02-24 02:49:38,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:38,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:38,379 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:38,379 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:38,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:38,480 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:38,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795076264] [2022-02-24 02:49:38,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1795076264] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:38,481 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:38,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:49:38,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493599514] [2022-02-24 02:49:38,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:38,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:49:38,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:38,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:49:38,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:49:38,481 INFO L87 Difference]: Start difference. First operand 980 states and 1181 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:45,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:45,273 INFO L93 Difference]: Finished difference Result 3384 states and 4119 transitions. [2022-02-24 02:49:45,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:49:45,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 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 102 [2022-02-24 02:49:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:45,278 INFO L225 Difference]: With dead ends: 3384 [2022-02-24 02:49:45,278 INFO L226 Difference]: Without dead ends: 3378 [2022-02-24 02:49:45,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:49:45,279 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 197 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:45,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 143 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:49:45,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3378 states. [2022-02-24 02:49:49,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3378 to 2311. [2022-02-24 02:49:49,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2306 states have (on average 1.2111882046834346) internal successors, (2793), 2306 states have internal predecessors, (2793), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 2797 transitions. [2022-02-24 02:49:49,759 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 2797 transitions. Word has length 102 [2022-02-24 02:49:49,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:49,759 INFO L470 AbstractCegarLoop]: Abstraction has 2311 states and 2797 transitions. [2022-02-24 02:49:49,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:49,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 2797 transitions. [2022-02-24 02:49:49,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:49:49,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:49,762 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:49,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-24 02:49:49,762 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:49,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:49,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1573170234, now seen corresponding path program 9 times [2022-02-24 02:49:49,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:49,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932350429] [2022-02-24 02:49:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:49,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:49,765 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:49,765 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:50,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:50,099 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:50,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932350429] [2022-02-24 02:49:50,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1932350429] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:50,100 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:50,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:49:50,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944268087] [2022-02-24 02:49:50,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:50,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:49:50,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:50,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:49:50,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:49:50,100 INFO L87 Difference]: Start difference. First operand 2311 states and 2797 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 02:49:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:54,805 INFO L93 Difference]: Finished difference Result 2971 states and 3591 transitions. [2022-02-24 02:49:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 02:49:54,805 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 102 [2022-02-24 02:49:54,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:54,808 INFO L225 Difference]: With dead ends: 2971 [2022-02-24 02:49:54,808 INFO L226 Difference]: Without dead ends: 2313 [2022-02-24 02:49:54,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:49:54,809 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:54,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 54 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:49:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-02-24 02:49:59,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2311. [2022-02-24 02:49:59,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2306 states have (on average 1.207285342584562) internal successors, (2784), 2306 states have internal predecessors, (2784), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 2788 transitions. [2022-02-24 02:49:59,337 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 2788 transitions. Word has length 102 [2022-02-24 02:49:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:59,337 INFO L470 AbstractCegarLoop]: Abstraction has 2311 states and 2788 transitions. [2022-02-24 02:49:59,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 02:49:59,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 2788 transitions. [2022-02-24 02:49:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:49:59,339 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:59,339 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:59,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-24 02:49:59,339 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:59,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1220399798, now seen corresponding path program 10 times [2022-02-24 02:49:59,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:59,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748345766] [2022-02-24 02:49:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:59,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:59,342 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:59,342 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:59,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:59,743 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:59,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748345766] [2022-02-24 02:49:59,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [748345766] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:59,743 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:59,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:49:59,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449812130] [2022-02-24 02:49:59,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:59,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:49:59,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:59,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:49:59,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:49:59,744 INFO L87 Difference]: Start difference. First operand 2311 states and 2788 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:03,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:03,582 INFO L93 Difference]: Finished difference Result 2688 states and 3220 transitions. [2022-02-24 02:50:03,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:50:03,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 02:50:03,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:03,584 INFO L225 Difference]: With dead ends: 2688 [2022-02-24 02:50:03,584 INFO L226 Difference]: Without dead ends: 1664 [2022-02-24 02:50:03,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:50:03,591 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 93 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:03,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 79 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:50:03,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2022-02-24 02:50:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1562. [2022-02-24 02:50:06,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1557 states have (on average 1.2138728323699421) internal successors, (1890), 1557 states have internal predecessors, (1890), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 1894 transitions. [2022-02-24 02:50:06,669 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 1894 transitions. Word has length 102 [2022-02-24 02:50:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:06,669 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 1894 transitions. [2022-02-24 02:50:06,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:06,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 1894 transitions. [2022-02-24 02:50:06,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:50:06,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:06,670 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:06,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-24 02:50:06,671 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:06,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:06,671 INFO L85 PathProgramCache]: Analyzing trace with hash -313195450, now seen corresponding path program 11 times [2022-02-24 02:50:06,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:06,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307403028] [2022-02-24 02:50:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:06,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:06,689 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:06,689 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:07,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:07,150 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:07,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307403028] [2022-02-24 02:50:07,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1307403028] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:07,150 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:07,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:50:07,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420174057] [2022-02-24 02:50:07,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:07,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:50:07,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:07,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:50:07,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:50:07,151 INFO L87 Difference]: Start difference. First operand 1562 states and 1894 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:14,976 INFO L93 Difference]: Finished difference Result 3822 states and 4624 transitions. [2022-02-24 02:50:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 02:50:14,978 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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 102 [2022-02-24 02:50:14,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:14,981 INFO L225 Difference]: With dead ends: 3822 [2022-02-24 02:50:14,981 INFO L226 Difference]: Without dead ends: 3459 [2022-02-24 02:50:14,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 02:50:14,982 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 220 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:14,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 62 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:50:14,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3459 states. [2022-02-24 02:50:18,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 1535. [2022-02-24 02:50:18,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1530 states have (on average 1.2058823529411764) internal successors, (1845), 1530 states have internal predecessors, (1845), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:18,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 1849 transitions. [2022-02-24 02:50:18,036 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 1849 transitions. Word has length 102 [2022-02-24 02:50:18,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:18,036 INFO L470 AbstractCegarLoop]: Abstraction has 1535 states and 1849 transitions. [2022-02-24 02:50:18,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:18,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 1849 transitions. [2022-02-24 02:50:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:50:18,037 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:18,037 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:18,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-24 02:50:18,038 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:18,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:18,038 INFO L85 PathProgramCache]: Analyzing trace with hash 781431434, now seen corresponding path program 12 times [2022-02-24 02:50:18,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:18,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765523392] [2022-02-24 02:50:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:18,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:18,040 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:18,040 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:18,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:18,438 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:18,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765523392] [2022-02-24 02:50:18,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [765523392] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:18,438 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:18,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:50:18,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479667896] [2022-02-24 02:50:18,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:18,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:50:18,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:18,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:50:18,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:50:18,439 INFO L87 Difference]: Start difference. First operand 1535 states and 1849 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:22,627 INFO L93 Difference]: Finished difference Result 2018 states and 2405 transitions. [2022-02-24 02:50:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:50:22,628 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 102 [2022-02-24 02:50:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:22,630 INFO L225 Difference]: With dead ends: 2018 [2022-02-24 02:50:22,630 INFO L226 Difference]: Without dead ends: 1718 [2022-02-24 02:50:22,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:50:22,631 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 77 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:22,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 103 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:50:22,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-02-24 02:50:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1538. [2022-02-24 02:50:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1533 states have (on average 1.2054794520547945) internal successors, (1848), 1533 states have internal predecessors, (1848), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:25,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 1852 transitions. [2022-02-24 02:50:25,927 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 1852 transitions. Word has length 102 [2022-02-24 02:50:25,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:25,927 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 1852 transitions. [2022-02-24 02:50:25,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:25,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 1852 transitions. [2022-02-24 02:50:25,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:50:25,929 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:25,929 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:25,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-24 02:50:25,929 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:25,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:25,929 INFO L85 PathProgramCache]: Analyzing trace with hash 855809162, now seen corresponding path program 13 times [2022-02-24 02:50:25,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:25,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180075693] [2022-02-24 02:50:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:25,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:25,932 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:25,932 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:26,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:26,378 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:26,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180075693] [2022-02-24 02:50:26,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1180075693] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:26,379 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:26,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:50:26,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357943296] [2022-02-24 02:50:26,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:26,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:50:26,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:26,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:50:26,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:50:26,379 INFO L87 Difference]: Start difference. First operand 1538 states and 1852 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:35,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:35,887 INFO L93 Difference]: Finished difference Result 4557 states and 5489 transitions. [2022-02-24 02:50:35,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:50:35,887 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 02:50:35,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:35,892 INFO L225 Difference]: With dead ends: 4557 [2022-02-24 02:50:35,892 INFO L226 Difference]: Without dead ends: 4006 [2022-02-24 02:50:35,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:50:35,893 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 241 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:35,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 67 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:50:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4006 states. [2022-02-24 02:50:40,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4006 to 1987. [2022-02-24 02:50:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1982 states have (on average 1.200302724520686) internal successors, (2379), 1982 states have internal predecessors, (2379), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 2383 transitions. [2022-02-24 02:50:40,117 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 2383 transitions. Word has length 102 [2022-02-24 02:50:40,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:40,117 INFO L470 AbstractCegarLoop]: Abstraction has 1987 states and 2383 transitions. [2022-02-24 02:50:40,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:40,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 2383 transitions. [2022-02-24 02:50:40,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:50:40,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:40,119 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:50:40,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-24 02:50:40,119 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:40,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:40,120 INFO L85 PathProgramCache]: Analyzing trace with hash 127481354, now seen corresponding path program 14 times [2022-02-24 02:50:40,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:40,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236471033] [2022-02-24 02:50:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:40,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:40,123 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:40,123 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:40,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:40,954 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:40,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236471033] [2022-02-24 02:50:40,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [236471033] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:40,955 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:40,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 02:50:40,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695392807] [2022-02-24 02:50:40,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:40,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 02:50:40,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:40,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 02:50:40,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:50:40,955 INFO L87 Difference]: Start difference. First operand 1987 states and 2383 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:53,870 INFO L93 Difference]: Finished difference Result 6739 states and 8084 transitions. [2022-02-24 02:50:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 02:50:53,871 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 02:50:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:53,877 INFO L225 Difference]: With dead ends: 6739 [2022-02-24 02:50:53,877 INFO L226 Difference]: Without dead ends: 5242 [2022-02-24 02:50:53,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=472, Invalid=2284, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 02:50:53,879 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 288 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:53,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 66 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:50:53,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2022-02-24 02:51:00,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 3458. [2022-02-24 02:51:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3458 states, 3453 states have (on average 1.1940341731827397) internal successors, (4123), 3453 states have internal predecessors, (4123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3458 states to 3458 states and 4127 transitions. [2022-02-24 02:51:00,981 INFO L78 Accepts]: Start accepts. Automaton has 3458 states and 4127 transitions. Word has length 102 [2022-02-24 02:51:00,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:00,981 INFO L470 AbstractCegarLoop]: Abstraction has 3458 states and 4127 transitions. [2022-02-24 02:51:00,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:00,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3458 states and 4127 transitions. [2022-02-24 02:51:00,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:51:00,985 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:00,985 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:51:00,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-24 02:51:00,985 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:00,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2035279814, now seen corresponding path program 15 times [2022-02-24 02:51:00,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:00,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640907218] [2022-02-24 02:51:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:00,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:00,988 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:51:00,988 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:51:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:01,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:51:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:51:01,838 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:51:01,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640907218] [2022-02-24 02:51:01,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1640907218] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:51:01,838 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:51:01,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 02:51:01,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937624199] [2022-02-24 02:51:01,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:51:01,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 02:51:01,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:51:01,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 02:51:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-02-24 02:51:01,839 INFO L87 Difference]: Start difference. First operand 3458 states and 4127 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 02:51:21,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:51:21,774 INFO L93 Difference]: Finished difference Result 9632 states and 11502 transitions. [2022-02-24 02:51:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 02:51:21,775 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 102 [2022-02-24 02:51:21,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:51:21,785 INFO L225 Difference]: With dead ends: 9632 [2022-02-24 02:51:21,785 INFO L226 Difference]: Without dead ends: 8006 [2022-02-24 02:51:21,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=887, Invalid=5119, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 02:51:21,790 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 523 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:51:21,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 72 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:51:21,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8006 states. [2022-02-24 02:51:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8006 to 4240. [2022-02-24 02:51:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4240 states, 4235 states have (on average 1.1988193624557262) internal successors, (5077), 4235 states have internal predecessors, (5077), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:30,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4240 states to 4240 states and 5081 transitions. [2022-02-24 02:51:30,897 INFO L78 Accepts]: Start accepts. Automaton has 4240 states and 5081 transitions. Word has length 102 [2022-02-24 02:51:30,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:30,897 INFO L470 AbstractCegarLoop]: Abstraction has 4240 states and 5081 transitions. [2022-02-24 02:51:30,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 02:51:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4240 states and 5081 transitions. [2022-02-24 02:51:30,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:51:30,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:30,901 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:51:30,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-24 02:51:30,901 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:30,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:30,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1367404426, now seen corresponding path program 16 times [2022-02-24 02:51:30,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:30,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735365524] [2022-02-24 02:51:30,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:30,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:30,904 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:51:30,905 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:51:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:31,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:51:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:31,959 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 02:51:31,959 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:51:31,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735365524] [2022-02-24 02:51:31,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [735365524] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:51:31,959 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:51:31,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 02:51:31,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648437493] [2022-02-24 02:51:31,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:51:31,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 02:51:31,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:51:31,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 02:51:31,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:51:31,960 INFO L87 Difference]: Start difference. First operand 4240 states and 5081 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 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 02:51:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:51:50,236 INFO L93 Difference]: Finished difference Result 7601 states and 8980 transitions. [2022-02-24 02:51:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 02:51:50,236 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 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 102 [2022-02-24 02:51:50,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:51:50,245 INFO L225 Difference]: With dead ends: 7601 [2022-02-24 02:51:50,245 INFO L226 Difference]: Without dead ends: 7289 [2022-02-24 02:51:50,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 02:51:50,247 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 598 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:51:50,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 117 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:51:50,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7289 states. [2022-02-24 02:51:59,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7289 to 4240. [2022-02-24 02:51:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4240 states, 4235 states have (on average 1.1974025974025975) internal successors, (5071), 4235 states have internal predecessors, (5071), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:59,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4240 states to 4240 states and 5075 transitions. [2022-02-24 02:51:59,373 INFO L78 Accepts]: Start accepts. Automaton has 4240 states and 5075 transitions. Word has length 102 [2022-02-24 02:51:59,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:59,373 INFO L470 AbstractCegarLoop]: Abstraction has 4240 states and 5075 transitions. [2022-02-24 02:51:59,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 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 02:51:59,373 INFO L276 IsEmpty]: Start isEmpty. Operand 4240 states and 5075 transitions. [2022-02-24 02:51:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:51:59,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:59,377 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:51:59,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-24 02:51:59,377 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:59,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:59,377 INFO L85 PathProgramCache]: Analyzing trace with hash 933142086, now seen corresponding path program 17 times [2022-02-24 02:51:59,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:59,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488863522] [2022-02-24 02:51:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:59,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:59,380 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:51:59,380 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:51:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:00,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:52:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:52:00,122 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:52:00,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488863522] [2022-02-24 02:52:00,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1488863522] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:52:00,122 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:52:00,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:52:00,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128734423] [2022-02-24 02:52:00,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:52:00,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:52:00,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:52:00,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:52:00,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:52:00,122 INFO L87 Difference]: Start difference. First operand 4240 states and 5075 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:18,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:52:18,581 INFO L93 Difference]: Finished difference Result 7637 states and 8996 transitions. [2022-02-24 02:52:18,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 02:52:18,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 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 102 [2022-02-24 02:52:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:52:18,591 INFO L225 Difference]: With dead ends: 7637 [2022-02-24 02:52:18,591 INFO L226 Difference]: Without dead ends: 7331 [2022-02-24 02:52:18,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=410, Invalid=2896, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 02:52:18,593 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 330 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:52:18,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 120 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:52:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7331 states. [2022-02-24 02:52:27,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7331 to 4132. [2022-02-24 02:52:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4132 states, 4127 states have (on average 1.2003876908165738) internal successors, (4954), 4127 states have internal predecessors, (4954), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:27,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4132 states to 4132 states and 4958 transitions. [2022-02-24 02:52:27,531 INFO L78 Accepts]: Start accepts. Automaton has 4132 states and 4958 transitions. Word has length 102 [2022-02-24 02:52:27,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:52:27,531 INFO L470 AbstractCegarLoop]: Abstraction has 4132 states and 4958 transitions. [2022-02-24 02:52:27,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:27,531 INFO L276 IsEmpty]: Start isEmpty. Operand 4132 states and 4958 transitions. [2022-02-24 02:52:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:52:27,535 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:52:27,535 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:52:27,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-24 02:52:27,535 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:52:27,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:52:27,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1047935946, now seen corresponding path program 1 times [2022-02-24 02:52:27,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:52:27,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329713136] [2022-02-24 02:52:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:52:27,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:52:27,538 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:52:27,539 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:52:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:27,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:52:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:27,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:52:27,906 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:52:27,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329713136] [2022-02-24 02:52:27,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [329713136] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:52:27,907 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:52:27,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:52:27,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258696636] [2022-02-24 02:52:27,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:52:27,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:52:27,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:52:27,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:52:27,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:52:27,907 INFO L87 Difference]: Start difference. First operand 4132 states and 4958 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 02:52:39,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:52:39,775 INFO L93 Difference]: Finished difference Result 5544 states and 6598 transitions. [2022-02-24 02:52:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:52:39,776 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 102 [2022-02-24 02:52:39,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:52:39,781 INFO L225 Difference]: With dead ends: 5544 [2022-02-24 02:52:39,782 INFO L226 Difference]: Without dead ends: 5073 [2022-02-24 02:52:39,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:52:39,783 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 174 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:52:39,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 48 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:52:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5073 states. [2022-02-24 02:52:48,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5073 to 4027. [2022-02-24 02:52:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4027 states, 4022 states have (on average 1.2026355047240178) internal successors, (4837), 4022 states have internal predecessors, (4837), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:48,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 4841 transitions. [2022-02-24 02:52:48,536 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 4841 transitions. Word has length 102 [2022-02-24 02:52:48,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:52:48,536 INFO L470 AbstractCegarLoop]: Abstraction has 4027 states and 4841 transitions. [2022-02-24 02:52:48,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 02:52:48,536 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 4841 transitions. [2022-02-24 02:52:48,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:52:48,539 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:52:48,539 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:52:48,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-24 02:52:48,539 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:52:48,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:52:48,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1560036234, now seen corresponding path program 18 times [2022-02-24 02:52:48,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:52:48,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094929979] [2022-02-24 02:52:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:52:48,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:52:48,542 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:52:48,542 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:52:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:48,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:52:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:52:48,944 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:52:48,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094929979] [2022-02-24 02:52:48,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1094929979] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:52:48,944 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:52:48,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:52:48,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596213961] [2022-02-24 02:52:48,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:52:48,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:52:48,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:52:48,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:52:48,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:52:48,945 INFO L87 Difference]: Start difference. First operand 4027 states and 4841 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:53:03,269 INFO L93 Difference]: Finished difference Result 7120 states and 8483 transitions. [2022-02-24 02:53:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:53:03,270 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 02:53:03,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:53:03,277 INFO L225 Difference]: With dead ends: 7120 [2022-02-24 02:53:03,277 INFO L226 Difference]: Without dead ends: 6135 [2022-02-24 02:53:03,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:53:03,279 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 174 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:53:03,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 51 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:53:03,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6135 states. [2022-02-24 02:53:13,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6135 to 4643. [2022-02-24 02:53:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4638 states have (on average 1.1996550237171195) internal successors, (5564), 4638 states have internal predecessors, (5564), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:13,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 5568 transitions. [2022-02-24 02:53:13,270 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 5568 transitions. Word has length 102 [2022-02-24 02:53:13,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:53:13,270 INFO L470 AbstractCegarLoop]: Abstraction has 4643 states and 5568 transitions. [2022-02-24 02:53:13,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:13,270 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 5568 transitions. [2022-02-24 02:53:13,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:53:13,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:53:13,273 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:53:13,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-24 02:53:13,274 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:53:13,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:53:13,274 INFO L85 PathProgramCache]: Analyzing trace with hash 168583758, now seen corresponding path program 19 times [2022-02-24 02:53:13,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:53:13,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717507624] [2022-02-24 02:53:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:53:13,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:53:13,277 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:53:13,277 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:53:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:13,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:53:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:13,610 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 02:53:13,610 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:53:13,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717507624] [2022-02-24 02:53:13,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1717507624] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:53:13,610 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:53:13,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:53:13,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379487227] [2022-02-24 02:53:13,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:53:13,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:53:13,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:53:13,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:53:13,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:53:13,611 INFO L87 Difference]: Start difference. First operand 4643 states and 5568 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 02:53:23,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:53:23,671 INFO L93 Difference]: Finished difference Result 6728 states and 8058 transitions. [2022-02-24 02:53:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 02:53:23,671 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 102 [2022-02-24 02:53:23,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:53:23,676 INFO L225 Difference]: With dead ends: 6728 [2022-02-24 02:53:23,676 INFO L226 Difference]: Without dead ends: 4610 [2022-02-24 02:53:23,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:53:23,679 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 75 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:53:23,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 53 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:53:23,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2022-02-24 02:53:33,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2022-02-24 02:53:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4605 states have (on average 1.1943539630836049) internal successors, (5500), 4605 states have internal predecessors, (5500), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:33,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 5504 transitions. [2022-02-24 02:53:33,751 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 5504 transitions. Word has length 102 [2022-02-24 02:53:33,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:53:33,751 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 5504 transitions. [2022-02-24 02:53:33,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 02:53:33,751 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 5504 transitions. [2022-02-24 02:53:33,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:53:33,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:53:33,755 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:53:33,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-24 02:53:33,755 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:53:33,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:53:33,755 INFO L85 PathProgramCache]: Analyzing trace with hash 201885714, now seen corresponding path program 20 times [2022-02-24 02:53:33,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:53:33,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710936098] [2022-02-24 02:53:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:53:33,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:53:33,758 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:53:33,758 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:53:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:34,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:53:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:53:34,189 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:53:34,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710936098] [2022-02-24 02:53:34,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [710936098] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:53:34,189 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:53:34,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:53:34,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555586320] [2022-02-24 02:53:34,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:53:34,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:53:34,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:53:34,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:53:34,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:53:34,190 INFO L87 Difference]: Start difference. First operand 4610 states and 5504 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:45,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:53:45,111 INFO L93 Difference]: Finished difference Result 6855 states and 8169 transitions. [2022-02-24 02:53:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:53:45,112 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 02:53:45,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:53:45,117 INFO L225 Difference]: With dead ends: 6855 [2022-02-24 02:53:45,117 INFO L226 Difference]: Without dead ends: 4818 [2022-02-24 02:53:45,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:53:45,120 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:53:45,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 86 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:53:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4818 states. [2022-02-24 02:53:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4818 to 4361. [2022-02-24 02:53:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4361 states, 4356 states have (on average 1.205463728191001) internal successors, (5251), 4356 states have internal predecessors, (5251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:54,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4361 states to 4361 states and 5255 transitions. [2022-02-24 02:53:54,939 INFO L78 Accepts]: Start accepts. Automaton has 4361 states and 5255 transitions. Word has length 102 [2022-02-24 02:53:54,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:53:54,939 INFO L470 AbstractCegarLoop]: Abstraction has 4361 states and 5255 transitions. [2022-02-24 02:53:54,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:54,940 INFO L276 IsEmpty]: Start isEmpty. Operand 4361 states and 5255 transitions. [2022-02-24 02:53:54,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:53:54,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:53:54,942 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:53:54,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-24 02:53:54,943 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:53:54,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:53:54,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1470626894, now seen corresponding path program 21 times [2022-02-24 02:53:54,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:53:54,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182035248] [2022-02-24 02:53:54,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:53:54,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:53:54,946 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:53:54,946 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:53:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:55,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:53:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:53:55,218 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:53:55,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182035248] [2022-02-24 02:53:55,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1182035248] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:53:55,218 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:53:55,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:53:55,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098609247] [2022-02-24 02:53:55,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:53:55,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:53:55,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:53:55,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:53:55,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:53:55,219 INFO L87 Difference]: Start difference. First operand 4361 states and 5255 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:05,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:54:05,109 INFO L93 Difference]: Finished difference Result 4691 states and 5648 transitions. [2022-02-24 02:54:05,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:54:05,110 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 02:54:05,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:54:05,115 INFO L225 Difference]: With dead ends: 4691 [2022-02-24 02:54:05,115 INFO L226 Difference]: Without dead ends: 4343 [2022-02-24 02:54:05,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:54:05,116 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 77 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:54:05,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 49 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:54:05,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4343 states. [2022-02-24 02:54:14,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4343 to 4343. [2022-02-24 02:54:14,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4343 states, 4338 states have (on average 1.1996311664361456) internal successors, (5204), 4338 states have internal predecessors, (5204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:14,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4343 states to 4343 states and 5208 transitions. [2022-02-24 02:54:14,996 INFO L78 Accepts]: Start accepts. Automaton has 4343 states and 5208 transitions. Word has length 102 [2022-02-24 02:54:14,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:54:14,996 INFO L470 AbstractCegarLoop]: Abstraction has 4343 states and 5208 transitions. [2022-02-24 02:54:14,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:14,996 INFO L276 IsEmpty]: Start isEmpty. Operand 4343 states and 5208 transitions. [2022-02-24 02:54:14,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:54:14,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:54:14,999 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:54:14,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-24 02:54:14,999 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:54:14,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:54:14,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1428558542, now seen corresponding path program 22 times [2022-02-24 02:54:14,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:54:14,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394974658] [2022-02-24 02:54:14,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:54:15,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:54:15,002 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:54:15,002 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:54:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:15,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:54:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:54:15,319 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:54:15,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394974658] [2022-02-24 02:54:15,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [394974658] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:54:15,319 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:54:15,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:54:15,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709863456] [2022-02-24 02:54:15,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:54:15,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:54:15,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:54:15,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:54:15,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:54:15,320 INFO L87 Difference]: Start difference. First operand 4343 states and 5208 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:25,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:54:25,187 INFO L93 Difference]: Finished difference Result 4661 states and 5587 transitions. [2022-02-24 02:54:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 02:54:25,188 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 102 [2022-02-24 02:54:25,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:54:25,193 INFO L225 Difference]: With dead ends: 4661 [2022-02-24 02:54:25,193 INFO L226 Difference]: Without dead ends: 4337 [2022-02-24 02:54:25,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:54:25,194 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 81 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:54:25,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 65 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:54:25,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4337 states. [2022-02-24 02:54:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4337 to 4337. [2022-02-24 02:54:35,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4337 states, 4332 states have (on average 1.1985226223453371) internal successors, (5192), 4332 states have internal predecessors, (5192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4337 states to 4337 states and 5196 transitions. [2022-02-24 02:54:35,064 INFO L78 Accepts]: Start accepts. Automaton has 4337 states and 5196 transitions. Word has length 102 [2022-02-24 02:54:35,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:54:35,064 INFO L470 AbstractCegarLoop]: Abstraction has 4337 states and 5196 transitions. [2022-02-24 02:54:35,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4337 states and 5196 transitions. [2022-02-24 02:54:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:54:35,067 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:54:35,068 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:54:35,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-02-24 02:54:35,068 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:54:35,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:54:35,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1771781870, now seen corresponding path program 23 times [2022-02-24 02:54:35,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:54:35,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540424247] [2022-02-24 02:54:35,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:54:35,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:54:35,071 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:54:35,071 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:54:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:35,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:54:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:54:35,521 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:54:35,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540424247] [2022-02-24 02:54:35,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [540424247] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:54:35,521 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:54:35,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:54:35,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134288555] [2022-02-24 02:54:35,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:54:35,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:54:35,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:54:35,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:54:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:54:35,522 INFO L87 Difference]: Start difference. First operand 4337 states and 5196 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:54:45,950 INFO L93 Difference]: Finished difference Result 4637 states and 5561 transitions. [2022-02-24 02:54:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:54:45,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 102 [2022-02-24 02:54:45,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:54:45,955 INFO L225 Difference]: With dead ends: 4637 [2022-02-24 02:54:45,955 INFO L226 Difference]: Without dead ends: 4361 [2022-02-24 02:54:45,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:54:45,956 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 81 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:54:45,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 92 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:54:45,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2022-02-24 02:54:55,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 4229. [2022-02-24 02:54:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4229 states, 4224 states have (on average 1.2035984848484849) internal successors, (5084), 4224 states have internal predecessors, (5084), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:55,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4229 states to 4229 states and 5088 transitions. [2022-02-24 02:54:55,479 INFO L78 Accepts]: Start accepts. Automaton has 4229 states and 5088 transitions. Word has length 102 [2022-02-24 02:54:55,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:54:55,479 INFO L470 AbstractCegarLoop]: Abstraction has 4229 states and 5088 transitions. [2022-02-24 02:54:55,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:55,480 INFO L276 IsEmpty]: Start isEmpty. Operand 4229 states and 5088 transitions. [2022-02-24 02:54:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:54:55,482 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:54:55,483 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:54:55,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-02-24 02:54:55,483 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:54:55,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:54:55,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1071914250, now seen corresponding path program 24 times [2022-02-24 02:54:55,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:54:55,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140737403] [2022-02-24 02:54:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:54:55,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:54:55,486 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:54:55,486 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:54:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:55,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:54:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:54:55,982 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:54:55,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140737403] [2022-02-24 02:54:55,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1140737403] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:54:55,982 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:54:55,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:54:55,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148200219] [2022-02-24 02:54:55,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:54:55,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:54:55,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:54:55,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:54:55,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:54:55,983 INFO L87 Difference]: Start difference. First operand 4229 states and 5088 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:09,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:55:09,476 INFO L93 Difference]: Finished difference Result 6135 states and 7362 transitions. [2022-02-24 02:55:09,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:55:09,476 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 02:55:09,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:55:09,482 INFO L225 Difference]: With dead ends: 6135 [2022-02-24 02:55:09,482 INFO L226 Difference]: Without dead ends: 5336 [2022-02-24 02:55:09,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:55:09,483 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 187 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:55:09,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 86 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:55:09,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2022-02-24 02:55:18,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 4090. [2022-02-24 02:55:18,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4090 states, 4085 states have (on average 1.1987760097919216) internal successors, (4897), 4085 states have internal predecessors, (4897), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:18,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4090 states to 4090 states and 4901 transitions. [2022-02-24 02:55:18,664 INFO L78 Accepts]: Start accepts. Automaton has 4090 states and 4901 transitions. Word has length 102 [2022-02-24 02:55:18,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:55:18,664 INFO L470 AbstractCegarLoop]: Abstraction has 4090 states and 4901 transitions. [2022-02-24 02:55:18,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:18,665 INFO L276 IsEmpty]: Start isEmpty. Operand 4090 states and 4901 transitions. [2022-02-24 02:55:18,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:55:18,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:55:18,668 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:55:18,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-02-24 02:55:18,668 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:55:18,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:55:18,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2054048434, now seen corresponding path program 25 times [2022-02-24 02:55:18,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:55:18,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591656058] [2022-02-24 02:55:18,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:55:18,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:55:18,674 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:55:18,674 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:55:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:19,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:55:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:55:19,064 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:55:19,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591656058] [2022-02-24 02:55:19,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1591656058] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:55:19,064 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:55:19,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:55:19,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713000078] [2022-02-24 02:55:19,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:55:19,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:55:19,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:55:19,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:55:19,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:55:19,065 INFO L87 Difference]: Start difference. First operand 4090 states and 4901 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 02:55:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:55:28,657 INFO L93 Difference]: Finished difference Result 5895 states and 7060 transitions. [2022-02-24 02:55:28,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:55:28,657 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 102 [2022-02-24 02:55:28,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:55:28,662 INFO L225 Difference]: With dead ends: 5895 [2022-02-24 02:55:28,662 INFO L226 Difference]: Without dead ends: 4090 [2022-02-24 02:55:28,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:55:28,664 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 131 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:55:28,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 57 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:55:28,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2022-02-24 02:55:38,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 4090. [2022-02-24 02:55:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4090 states, 4085 states have (on average 1.1902080783353732) internal successors, (4862), 4085 states have internal predecessors, (4862), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4090 states to 4090 states and 4866 transitions. [2022-02-24 02:55:38,067 INFO L78 Accepts]: Start accepts. Automaton has 4090 states and 4866 transitions. Word has length 102 [2022-02-24 02:55:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:55:38,067 INFO L470 AbstractCegarLoop]: Abstraction has 4090 states and 4866 transitions. [2022-02-24 02:55:38,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 02:55:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 4090 states and 4866 transitions. [2022-02-24 02:55:38,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:55:38,070 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:55:38,071 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:55:38,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-02-24 02:55:38,071 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:55:38,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:55:38,071 INFO L85 PathProgramCache]: Analyzing trace with hash 118857926, now seen corresponding path program 26 times [2022-02-24 02:55:38,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:55:38,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105238558] [2022-02-24 02:55:38,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:55:38,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:55:38,074 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:55:38,074 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:55:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:38,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:55:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:55:38,620 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:55:38,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105238558] [2022-02-24 02:55:38,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [105238558] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:55:38,620 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:55:38,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:55:38,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221630618] [2022-02-24 02:55:38,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:55:38,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:55:38,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:55:38,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:55:38,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:55:38,621 INFO L87 Difference]: Start difference. First operand 4090 states and 4866 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:53,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:55:53,836 INFO L93 Difference]: Finished difference Result 6691 states and 7959 transitions. [2022-02-24 02:55:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 02:55:53,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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 102 [2022-02-24 02:55:53,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:55:53,843 INFO L225 Difference]: With dead ends: 6691 [2022-02-24 02:55:53,843 INFO L226 Difference]: Without dead ends: 5967 [2022-02-24 02:55:53,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 02:55:53,845 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 259 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:55:53,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 67 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:55:53,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5967 states. [2022-02-24 02:56:04,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5967 to 4703. [2022-02-24 02:56:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4698 states have (on average 1.1871008939974457) internal successors, (5577), 4698 states have internal predecessors, (5577), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:56:04,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 5581 transitions. [2022-02-24 02:56:04,717 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 5581 transitions. Word has length 102 [2022-02-24 02:56:04,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:56:04,718 INFO L470 AbstractCegarLoop]: Abstraction has 4703 states and 5581 transitions. [2022-02-24 02:56:04,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:56:04,718 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 5581 transitions. [2022-02-24 02:56:04,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:56:04,721 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:56:04,721 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:56:04,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-02-24 02:56:04,721 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:56:04,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:56:04,721 INFO L85 PathProgramCache]: Analyzing trace with hash 637840838, now seen corresponding path program 27 times [2022-02-24 02:56:04,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:56:04,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384018442] [2022-02-24 02:56:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:56:04,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:56:04,725 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:56:04,725 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:56:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:05,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:56:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:56:05,086 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:56:05,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384018442] [2022-02-24 02:56:05,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1384018442] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:56:05,086 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:56:05,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:56:05,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460878308] [2022-02-24 02:56:05,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:56:05,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:56:05,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:56:05,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:56:05,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:56:05,087 INFO L87 Difference]: Start difference. First operand 4703 states and 5581 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 02:56:16,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:56:16,291 INFO L93 Difference]: Finished difference Result 6786 states and 8046 transitions. [2022-02-24 02:56:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:56:16,292 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 102 [2022-02-24 02:56:16,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:56:16,297 INFO L225 Difference]: With dead ends: 6786 [2022-02-24 02:56:16,297 INFO L226 Difference]: Without dead ends: 4719 [2022-02-24 02:56:16,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:56:16,299 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 131 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:56:16,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 62 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:56:16,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4719 states. [2022-02-24 02:56:27,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4719 to 4607. [2022-02-24 02:56:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4602 states have (on average 1.1820947414167753) internal successors, (5440), 4602 states have internal predecessors, (5440), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:56:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 5444 transitions. [2022-02-24 02:56:27,136 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 5444 transitions. Word has length 102 [2022-02-24 02:56:27,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:56:27,136 INFO L470 AbstractCegarLoop]: Abstraction has 4607 states and 5444 transitions. [2022-02-24 02:56:27,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 02:56:27,136 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 5444 transitions. [2022-02-24 02:56:27,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:56:27,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:56:27,140 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:56:27,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-02-24 02:56:27,140 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:56:27,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:56:27,140 INFO L85 PathProgramCache]: Analyzing trace with hash -32696694, now seen corresponding path program 28 times [2022-02-24 02:56:27,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:56:27,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524336872] [2022-02-24 02:56:27,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:56:27,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:56:27,143 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:56:27,143 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:56:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:27,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:56:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:56:27,719 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:56:27,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524336872] [2022-02-24 02:56:27,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [524336872] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:56:27,719 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:56:27,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 02:56:27,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930984260] [2022-02-24 02:56:27,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:56:27,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 02:56:27,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:56:27,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 02:56:27,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:56:27,720 INFO L87 Difference]: Start difference. First operand 4607 states and 5444 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 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 02:56:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:56:44,005 INFO L93 Difference]: Finished difference Result 7154 states and 8477 transitions. [2022-02-24 02:56:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 02:56:44,005 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 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 102 [2022-02-24 02:56:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:56:44,013 INFO L225 Difference]: With dead ends: 7154 [2022-02-24 02:56:44,013 INFO L226 Difference]: Without dead ends: 6075 [2022-02-24 02:56:44,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=1206, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 02:56:44,015 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 221 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:56:44,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 69 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:56:44,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6075 states. [2022-02-24 02:56:55,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6075 to 4948. [2022-02-24 02:56:55,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4948 states, 4943 states have (on average 1.1778272304268662) internal successors, (5822), 4943 states have internal predecessors, (5822), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:56:55,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4948 states to 4948 states and 5826 transitions. [2022-02-24 02:56:55,605 INFO L78 Accepts]: Start accepts. Automaton has 4948 states and 5826 transitions. Word has length 102 [2022-02-24 02:56:55,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:56:55,606 INFO L470 AbstractCegarLoop]: Abstraction has 4948 states and 5826 transitions. [2022-02-24 02:56:55,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 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 02:56:55,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4948 states and 5826 transitions. [2022-02-24 02:56:55,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:56:55,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:56:55,609 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:56:55,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-02-24 02:56:55,609 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:56:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:56:55,609 INFO L85 PathProgramCache]: Analyzing trace with hash 407980110, now seen corresponding path program 29 times [2022-02-24 02:56:55,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:56:55,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378558830] [2022-02-24 02:56:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:56:55,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:56:55,612 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:56:55,612 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:56:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:56,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:56:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:56:56,142 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:56:56,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378558830] [2022-02-24 02:56:56,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1378558830] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:56:56,142 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:56:56,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:56:56,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352243381] [2022-02-24 02:56:56,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:56:56,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:56:56,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:56:56,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:56:56,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:56:56,143 INFO L87 Difference]: Start difference. First operand 4948 states and 5826 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:57:16,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:57:16,512 INFO L93 Difference]: Finished difference Result 9159 states and 10706 transitions. [2022-02-24 02:57:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 02:57:16,513 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 02:57:16,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:57:16,521 INFO L225 Difference]: With dead ends: 9159 [2022-02-24 02:57:16,521 INFO L226 Difference]: Without dead ends: 7522 [2022-02-24 02:57:16,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=323, Invalid=1747, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 02:57:16,524 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 328 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:57:16,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 90 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:57:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7522 states. [2022-02-24 02:57:28,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7522 to 4948. [2022-02-24 02:57:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4948 states, 4943 states have (on average 1.1725672668419989) internal successors, (5796), 4943 states have internal predecessors, (5796), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:57:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4948 states to 4948 states and 5800 transitions. [2022-02-24 02:57:28,287 INFO L78 Accepts]: Start accepts. Automaton has 4948 states and 5800 transitions. Word has length 102 [2022-02-24 02:57:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:57:28,288 INFO L470 AbstractCegarLoop]: Abstraction has 4948 states and 5800 transitions. [2022-02-24 02:57:28,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:57:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 4948 states and 5800 transitions. [2022-02-24 02:57:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:57:28,291 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:57:28,291 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:57:28,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-02-24 02:57:28,291 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:57:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:57:28,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1521162054, now seen corresponding path program 30 times [2022-02-24 02:57:28,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:57:28,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778894675] [2022-02-24 02:57:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:57:28,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:57:28,295 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:57:28,295 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:57:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:28,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:57:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:57:28,960 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:57:28,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778894675] [2022-02-24 02:57:28,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [778894675] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:57:28,960 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:57:28,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:57:28,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589534701] [2022-02-24 02:57:28,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:57:28,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:57:28,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:57:28,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:57:28,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:57:28,961 INFO L87 Difference]: Start difference. First operand 4948 states and 5800 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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 02:57:45,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:57:45,469 INFO L93 Difference]: Finished difference Result 7050 states and 8302 transitions. [2022-02-24 02:57:45,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 02:57:45,469 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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 102 [2022-02-24 02:57:45,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:57:45,476 INFO L225 Difference]: With dead ends: 7050 [2022-02-24 02:57:45,476 INFO L226 Difference]: Without dead ends: 5953 [2022-02-24 02:57:45,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 02:57:45,479 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 291 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:57:45,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 70 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:57:45,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5953 states. [2022-02-24 02:57:57,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5953 to 4799. [2022-02-24 02:57:57,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4794 states have (on average 1.1689612015018773) internal successors, (5604), 4794 states have internal predecessors, (5604), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:57:57,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 5608 transitions. [2022-02-24 02:57:57,087 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 5608 transitions. Word has length 102 [2022-02-24 02:57:57,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:57:57,087 INFO L470 AbstractCegarLoop]: Abstraction has 4799 states and 5608 transitions. [2022-02-24 02:57:57,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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 02:57:57,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 5608 transitions. [2022-02-24 02:57:57,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:57:57,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:57:57,090 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:57:57,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-02-24 02:57:57,090 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:57:57,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:57:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash -425329978, now seen corresponding path program 31 times [2022-02-24 02:57:57,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:57:57,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744080167] [2022-02-24 02:57:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:57:57,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:57:57,093 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:57:57,093 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:57:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:57,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:57:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:57:57,780 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:57:57,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744080167] [2022-02-24 02:57:57,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [744080167] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:57:57,780 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:57:57,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:57:57,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831965513] [2022-02-24 02:57:57,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:57:57,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:57:57,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:57:57,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:57:57,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:57:57,781 INFO L87 Difference]: Start difference. First operand 4799 states and 5608 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:58:17,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:58:17,894 INFO L93 Difference]: Finished difference Result 8801 states and 10202 transitions. [2022-02-24 02:58:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 02:58:17,894 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 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 102 [2022-02-24 02:58:17,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:58:17,902 INFO L225 Difference]: With dead ends: 8801 [2022-02-24 02:58:17,902 INFO L226 Difference]: Without dead ends: 7152 [2022-02-24 02:58:17,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=352, Invalid=2098, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 02:58:17,904 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 342 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:58:17,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 84 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:58:17,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7152 states. [2022-02-24 02:58:28,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7152 to 4511. [2022-02-24 02:58:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 4506 states have (on average 1.1739902352418996) internal successors, (5290), 4506 states have internal predecessors, (5290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:58:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 5294 transitions. [2022-02-24 02:58:28,841 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 5294 transitions. Word has length 102 [2022-02-24 02:58:28,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:58:28,841 INFO L470 AbstractCegarLoop]: Abstraction has 4511 states and 5294 transitions. [2022-02-24 02:58:28,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:58:28,841 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 5294 transitions. [2022-02-24 02:58:28,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:58:28,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:58:28,843 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:58:28,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-02-24 02:58:28,843 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:58:28,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:58:28,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1365094726, now seen corresponding path program 32 times [2022-02-24 02:58:28,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:58:28,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764446695] [2022-02-24 02:58:28,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:58:28,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:58:28,846 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:58:28,846 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:58:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:29,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:58:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:58:29,326 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:58:29,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764446695] [2022-02-24 02:58:29,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1764446695] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:58:29,326 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:58:29,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:58:29,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410411160] [2022-02-24 02:58:29,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:58:29,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:58:29,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:58:29,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:58:29,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:58:29,327 INFO L87 Difference]: Start difference. First operand 4511 states and 5294 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:58:47,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:58:47,214 INFO L93 Difference]: Finished difference Result 6888 states and 8036 transitions. [2022-02-24 02:58:47,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 02:58:47,214 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 02:58:47,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:58:47,222 INFO L225 Difference]: With dead ends: 6888 [2022-02-24 02:58:47,222 INFO L226 Difference]: Without dead ends: 6564 [2022-02-24 02:58:47,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=292, Invalid=1430, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 02:58:47,223 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 163 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:58:47,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 86 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:58:47,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6564 states. [2022-02-24 02:58:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6564 to 4469. [2022-02-24 02:58:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4469 states, 4464 states have (on average 1.1724910394265233) internal successors, (5234), 4464 states have internal predecessors, (5234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:58:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 5238 transitions. [2022-02-24 02:58:58,040 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 5238 transitions. Word has length 102 [2022-02-24 02:58:58,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:58:58,040 INFO L470 AbstractCegarLoop]: Abstraction has 4469 states and 5238 transitions. [2022-02-24 02:58:58,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:58:58,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 5238 transitions. [2022-02-24 02:58:58,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:58:58,042 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:58:58,042 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:58:58,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-02-24 02:58:58,042 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:58:58,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:58:58,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1768255606, now seen corresponding path program 33 times [2022-02-24 02:58:58,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:58:58,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842300969] [2022-02-24 02:58:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:58:58,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:58:58,045 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:58:58,045 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:58:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:58,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:58:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:58:58,394 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:58:58,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842300969] [2022-02-24 02:58:58,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [842300969] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:58:58,395 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:58:58,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:58:58,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782811464] [2022-02-24 02:58:58,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:58:58,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:58:58,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:58:58,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:58:58,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:58:58,395 INFO L87 Difference]: Start difference. First operand 4469 states and 5238 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:59:10,140 INFO L93 Difference]: Finished difference Result 4737 states and 5536 transitions. [2022-02-24 02:59:10,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:59:10,140 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 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 102 [2022-02-24 02:59:10,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:59:10,145 INFO L225 Difference]: With dead ends: 4737 [2022-02-24 02:59:10,145 INFO L226 Difference]: Without dead ends: 4601 [2022-02-24 02:59:10,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:59:10,146 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 72 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:59:10,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 90 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:59:10,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2022-02-24 02:59:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 4388. [2022-02-24 02:59:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4383 states have (on average 1.1729409080538444) internal successors, (5141), 4383 states have internal predecessors, (5141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 5145 transitions. [2022-02-24 02:59:20,940 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 5145 transitions. Word has length 102 [2022-02-24 02:59:20,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:59:20,940 INFO L470 AbstractCegarLoop]: Abstraction has 4388 states and 5145 transitions. [2022-02-24 02:59:20,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:20,940 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 5145 transitions. [2022-02-24 02:59:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:59:20,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:59:20,942 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:59:20,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-02-24 02:59:20,942 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:59:20,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:59:20,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1323026374, now seen corresponding path program 34 times [2022-02-24 02:59:20,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:59:20,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15777284] [2022-02-24 02:59:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:59:20,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:59:20,945 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:59:20,945 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:59:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:59:21,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:59:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:59:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:59:21,478 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:59:21,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15777284] [2022-02-24 02:59:21,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [15777284] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:59:21,478 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:59:21,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 02:59:21,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143859011] [2022-02-24 02:59:21,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:59:21,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 02:59:21,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:59:21,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 02:59:21,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:59:21,479 INFO L87 Difference]: Start difference. First operand 4388 states and 5145 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:59:35,703 INFO L93 Difference]: Finished difference Result 5676 states and 6666 transitions. [2022-02-24 02:59:35,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 02:59:35,704 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 02:59:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:59:35,708 INFO L225 Difference]: With dead ends: 5676 [2022-02-24 02:59:35,709 INFO L226 Difference]: Without dead ends: 5263 [2022-02-24 02:59:35,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:59:35,709 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 295 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:59:35,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 53 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:59:35,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5263 states. [2022-02-24 02:59:46,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5263 to 4334. [2022-02-24 02:59:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4334 states, 4329 states have (on average 1.1690921690921692) internal successors, (5061), 4329 states have internal predecessors, (5061), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4334 states to 4334 states and 5065 transitions. [2022-02-24 02:59:46,368 INFO L78 Accepts]: Start accepts. Automaton has 4334 states and 5065 transitions. Word has length 102 [2022-02-24 02:59:46,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:59:46,368 INFO L470 AbstractCegarLoop]: Abstraction has 4334 states and 5065 transitions. [2022-02-24 02:59:46,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 4334 states and 5065 transitions. [2022-02-24 02:59:46,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 02:59:46,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:59:46,370 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:59:46,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-02-24 02:59:46,370 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:59:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:59:46,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2129792438, now seen corresponding path program 2 times [2022-02-24 02:59:46,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:59:46,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633055838] [2022-02-24 02:59:46,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:59:46,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:59:46,373 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:59:46,373 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:59:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:59:46,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:59:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:59:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:59:46,866 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:59:46,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633055838] [2022-02-24 02:59:46,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [633055838] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:59:46,866 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:59:46,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:59:46,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920574902] [2022-02-24 02:59:46,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:59:46,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:59:46,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:59:46,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:59:46,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:59:46,867 INFO L87 Difference]: Start difference. First operand 4334 states and 5065 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 03:00:02,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:02,624 INFO L93 Difference]: Finished difference Result 6524 states and 7642 transitions. [2022-02-24 03:00:02,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 03:00:02,624 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 102 [2022-02-24 03:00:02,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:02,630 INFO L225 Difference]: With dead ends: 6524 [2022-02-24 03:00:02,630 INFO L226 Difference]: Without dead ends: 5806 [2022-02-24 03:00:02,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2022-02-24 03:00:02,632 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 188 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:02,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 69 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:00:02,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5806 states. [2022-02-24 03:00:14,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5806 to 4900. [2022-02-24 03:00:14,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4900 states, 4895 states have (on average 1.1658835546475996) internal successors, (5707), 4895 states have internal predecessors, (5707), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:00:14,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4900 states to 4900 states and 5711 transitions. [2022-02-24 03:00:14,813 INFO L78 Accepts]: Start accepts. Automaton has 4900 states and 5711 transitions. Word has length 102 [2022-02-24 03:00:14,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:14,814 INFO L470 AbstractCegarLoop]: Abstraction has 4900 states and 5711 transitions. [2022-02-24 03:00:14,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 03:00:14,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4900 states and 5711 transitions. [2022-02-24 03:00:14,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 03:00:14,816 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:14,816 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:14,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-02-24 03:00:14,816 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:14,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:14,816 INFO L85 PathProgramCache]: Analyzing trace with hash -752005298, now seen corresponding path program 35 times [2022-02-24 03:00:14,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:14,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986642967] [2022-02-24 03:00:14,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:14,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:14,819 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 03:00:14,820 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:00:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:15,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:15,277 INFO 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 03:00:15,277 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:15,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986642967] [2022-02-24 03:00:15,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [986642967] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:15,277 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:15,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 03:00:15,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280843497] [2022-02-24 03:00:15,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:15,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 03:00:15,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:15,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 03:00:15,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:00:15,278 INFO L87 Difference]: Start difference. First operand 4900 states and 5711 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 03:00:34,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:34,939 INFO L93 Difference]: Finished difference Result 7148 states and 8281 transitions. [2022-02-24 03:00:34,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 03:00:34,940 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 102 [2022-02-24 03:00:34,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:34,947 INFO L225 Difference]: With dead ends: 7148 [2022-02-24 03:00:34,947 INFO L226 Difference]: Without dead ends: 6991 [2022-02-24 03:00:34,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:00:34,948 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 215 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:34,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 62 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:00:34,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6991 states. [2022-02-24 03:00:47,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6991 to 4888. [2022-02-24 03:00:47,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4888 states, 4883 states have (on average 1.1650624616014744) internal successors, (5689), 4883 states have internal predecessors, (5689), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:00:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4888 states to 4888 states and 5693 transitions. [2022-02-24 03:00:47,246 INFO L78 Accepts]: Start accepts. Automaton has 4888 states and 5693 transitions. Word has length 102 [2022-02-24 03:00:47,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:47,247 INFO L470 AbstractCegarLoop]: Abstraction has 4888 states and 5693 transitions. [2022-02-24 03:00:47,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 03:00:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 4888 states and 5693 transitions. [2022-02-24 03:00:47,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 03:00:47,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:47,249 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:47,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-02-24 03:00:47,249 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:47,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:47,249 INFO L85 PathProgramCache]: Analyzing trace with hash -794073650, now seen corresponding path program 36 times [2022-02-24 03:00:47,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:47,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974407074] [2022-02-24 03:00:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:47,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:47,252 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 03:00:47,252 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:00:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:47,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:47,596 INFO 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 03:00:47,596 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:47,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974407074] [2022-02-24 03:00:47,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1974407074] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:47,596 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:47,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 03:00:47,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308371388] [2022-02-24 03:00:47,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:47,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 03:00:47,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:47,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 03:00:47,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:00:47,597 INFO L87 Difference]: Start difference. First operand 4888 states and 5693 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 03:01:00,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:01:00,558 INFO L93 Difference]: Finished difference Result 5233 states and 6091 transitions. [2022-02-24 03:01:00,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 03:01:00,559 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 102 [2022-02-24 03:01:00,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:01:00,564 INFO L225 Difference]: With dead ends: 5233 [2022-02-24 03:01:00,564 INFO L226 Difference]: Without dead ends: 4957 [2022-02-24 03:01:00,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:01:00,565 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 112 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:01:00,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 57 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:01:00,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4957 states.