/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/insertion_sort-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 02:45:20,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 02:45:20,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 02:45:20,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 02:45:20,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 02:45:20,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 02:45:20,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 02:45:20,419 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 02:45:20,431 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 02:45:20,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 02:45:20,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 02:45:20,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 02:45:20,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 02:45:20,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 02:45:20,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 02:45:20,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 02:45:20,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 02:45:20,434 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 02:45:20,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 02:45:20,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 02:45:20,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 02:45:20,435 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 02:45:20,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 02:45:20,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:45:20,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 02:45:20,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 02:45:20,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 02:45:20,436 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 02:45:20,436 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 02:45:20,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 02:45:20,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 02:45:20,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 02:45:20,710 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 02:45:20,710 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 02:45:20,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-1.c [2022-02-24 02:45:20,764 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53690b1f8/712bdefbbbf346b4b16b422571e5a9b9/FLAG4d71a728d [2022-02-24 02:45:21,149 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 02:45:21,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c [2022-02-24 02:45:21,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53690b1f8/712bdefbbbf346b4b16b422571e5a9b9/FLAG4d71a728d [2022-02-24 02:45:21,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53690b1f8/712bdefbbbf346b4b16b422571e5a9b9 [2022-02-24 02:45:21,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 02:45:21,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 02:45:21,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 02:45:21,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 02:45:21,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 02:45:21,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:45:21" (1/1) ... [2022-02-24 02:45:21,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3627d589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:21, skipping insertion in model container [2022-02-24 02:45:21,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:45:21" (1/1) ... [2022-02-24 02:45:21,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 02:45:21,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 02:45:21,730 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c[328,341] [2022-02-24 02:45:21,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:45:21,775 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 02:45:21,800 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c[328,341] [2022-02-24 02:45:21,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:45:21,837 INFO L208 MainTranslator]: Completed translation [2022-02-24 02:45:21,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:21 WrapperNode [2022-02-24 02:45:21,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 02:45:21,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 02:45:21,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 02:45:21,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 02:45:21,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:21" (1/1) ... [2022-02-24 02:45:21,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:21" (1/1) ... [2022-02-24 02:45:21,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:21" (1/1) ... [2022-02-24 02:45:21,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:21" (1/1) ... [2022-02-24 02:45:21,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:21" (1/1) ... [2022-02-24 02:45:21,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:21" (1/1) ... [2022-02-24 02:45:21,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:21" (1/1) ... [2022-02-24 02:45:21,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 02:45:21,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 02:45:21,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 02:45:21,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 02:45:21,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:21" (1/1) ... [2022-02-24 02:45:21,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:45:21,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 02:45:21,916 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 02:45:21,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 02:45:21,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 02:45:21,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 02:45:21,963 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 02:45:21,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 02:45:21,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 02:45:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 02:45:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 02:45:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 02:45:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 02:45:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 02:45:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-24 02:45:21,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 02:45:21,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 02:45:21,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-24 02:45:21,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 02:45:21,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 02:45:21,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 02:45:21,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 02:45:21,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 02:45:21,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 02:45:22,064 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 02:45:22,066 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 02:45:22,254 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 02:45:22,259 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 02:45:22,260 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-02-24 02:45:22,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:45:22 BoogieIcfgContainer [2022-02-24 02:45:22,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 02:45:22,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 02:45:22,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 02:45:22,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 02:45:22,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 02:45:21" (1/3) ... [2022-02-24 02:45:22,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c08c870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:45:22, skipping insertion in model container [2022-02-24 02:45:22,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:21" (2/3) ... [2022-02-24 02:45:22,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c08c870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:45:22, skipping insertion in model container [2022-02-24 02:45:22,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:45:22" (3/3) ... [2022-02-24 02:45:22,269 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2022-02-24 02:45:22,274 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 02:45:22,274 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 02:45:22,314 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 02:45:22,320 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-24 02:45:22,321 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 02:45:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:22,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 02:45:22,345 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:22,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:22,346 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:22,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:22,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1898607287, now seen corresponding path program 1 times [2022-02-24 02:45:22,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:22,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933390655] [2022-02-24 02:45:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:22,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:22,437 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:45:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:22,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:22,728 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:22,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933390655] [2022-02-24 02:45:22,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [933390655] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:22,730 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:22,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 02:45:22,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785142972] [2022-02-24 02:45:22,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:22,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 02:45:22,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:22,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 02:45:22,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-24 02:45:22,762 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 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 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:22,953 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2022-02-24 02:45:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:45:22,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-24 02:45:22,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:22,961 INFO L225 Difference]: With dead ends: 67 [2022-02-24 02:45:22,961 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 02:45:22,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:45:22,967 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 46 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:22,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 47 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:22,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 02:45:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-02-24 02:45:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-02-24 02:45:23,019 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2022-02-24 02:45:23,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:23,020 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-02-24 02:45:23,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:23,020 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-02-24 02:45:23,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 02:45:23,021 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:23,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:23,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 02:45:23,023 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:23,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1409532089, now seen corresponding path program 1 times [2022-02-24 02:45:23,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:23,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804660920] [2022-02-24 02:45:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:23,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:23,045 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:23,045 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:23,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:23,258 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:23,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804660920] [2022-02-24 02:45:23,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1804660920] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:23,260 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:23,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:45:23,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465385085] [2022-02-24 02:45:23,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:23,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:45:23,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:23,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:45:23,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:45:23,265 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:23,481 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-02-24 02:45:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:45:23,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 02:45:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:23,484 INFO L225 Difference]: With dead ends: 63 [2022-02-24 02:45:23,484 INFO L226 Difference]: Without dead ends: 40 [2022-02-24 02:45:23,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:45:23,490 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:23,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 48 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-24 02:45:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-02-24 02:45:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-02-24 02:45:23,510 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 17 [2022-02-24 02:45:23,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:23,511 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-02-24 02:45:23,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:23,512 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-02-24 02:45:23,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 02:45:23,513 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:23,514 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:23,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 02:45:23,514 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:23,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:23,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1068097608, now seen corresponding path program 1 times [2022-02-24 02:45:23,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:23,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537312598] [2022-02-24 02:45:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:23,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:23,535 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:23,535 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:24,044 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:24,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537312598] [2022-02-24 02:45:24,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [537312598] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:24,045 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:24,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:45:24,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367655248] [2022-02-24 02:45:24,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:24,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:45:24,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:24,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:45:24,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:45:24,047 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:24,558 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-02-24 02:45:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:45:24,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 02:45:24,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:24,561 INFO L225 Difference]: With dead ends: 83 [2022-02-24 02:45:24,561 INFO L226 Difference]: Without dead ends: 64 [2022-02-24 02:45:24,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:45:24,562 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:24,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 61 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:45:24,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-24 02:45:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2022-02-24 02:45:24,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:24,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-02-24 02:45:24,578 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 25 [2022-02-24 02:45:24,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:24,578 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-02-24 02:45:24,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,579 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-02-24 02:45:24,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 02:45:24,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:24,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:24,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 02:45:24,580 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:24,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash -367033030, now seen corresponding path program 1 times [2022-02-24 02:45:24,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:24,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310717285] [2022-02-24 02:45:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:24,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:24,584 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:24,584 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:24,647 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:24,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310717285] [2022-02-24 02:45:24,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [310717285] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:24,648 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:24,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 02:45:24,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341128088] [2022-02-24 02:45:24,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:24,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 02:45:24,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:24,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 02:45:24,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 02:45:24,649 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:24,746 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-02-24 02:45:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 02:45:24,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 02:45:24,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:24,749 INFO L225 Difference]: With dead ends: 92 [2022-02-24 02:45:24,749 INFO L226 Difference]: Without dead ends: 57 [2022-02-24 02:45:24,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:24,759 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:24,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 32 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:24,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-24 02:45:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2022-02-24 02:45:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:24,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-02-24 02:45:24,782 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 25 [2022-02-24 02:45:24,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:24,782 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-02-24 02:45:24,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,782 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-02-24 02:45:24,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 02:45:24,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:24,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:24,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 02:45:24,784 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:24,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:24,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1586594931, now seen corresponding path program 1 times [2022-02-24 02:45:24,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:24,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793754594] [2022-02-24 02:45:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:24,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:24,788 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:24,788 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:25,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:25,260 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:25,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793754594] [2022-02-24 02:45:25,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [793754594] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:25,260 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:25,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:45:25,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824605674] [2022-02-24 02:45:25,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:25,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:45:25,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:25,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:45:25,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:45:25,262 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 02:45:26,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:26,220 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2022-02-24 02:45:26,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 02:45:26,221 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 02:45:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:26,226 INFO L225 Difference]: With dead ends: 117 [2022-02-24 02:45:26,226 INFO L226 Difference]: Without dead ends: 82 [2022-02-24 02:45:26,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 02:45:26,229 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 109 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:26,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 96 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-24 02:45:26,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2022-02-24 02:45:26,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-02-24 02:45:26,252 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 30 [2022-02-24 02:45:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:26,252 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-02-24 02:45:26,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 02:45:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-02-24 02:45:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 02:45:26,253 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:26,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:26,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 02:45:26,253 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:26,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:26,254 INFO L85 PathProgramCache]: Analyzing trace with hash 932991851, now seen corresponding path program 2 times [2022-02-24 02:45:26,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:26,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473023119] [2022-02-24 02:45:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:26,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:26,257 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:26,257 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:26,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:26,404 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:26,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473023119] [2022-02-24 02:45:26,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1473023119] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:26,404 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:26,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:45:26,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631832603] [2022-02-24 02:45:26,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:26,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:45:26,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:26,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:45:26,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:26,405 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:26,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:26,665 INFO L93 Difference]: Finished difference Result 102 states and 123 transitions. [2022-02-24 02:45:26,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:45:26,666 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 02:45:26,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:26,667 INFO L225 Difference]: With dead ends: 102 [2022-02-24 02:45:26,667 INFO L226 Difference]: Without dead ends: 81 [2022-02-24 02:45:26,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:45:26,668 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 121 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:26,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 65 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:26,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-24 02:45:26,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2022-02-24 02:45:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 60 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:26,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2022-02-24 02:45:26,692 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 31 [2022-02-24 02:45:26,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:26,692 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2022-02-24 02:45:26,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:26,692 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2022-02-24 02:45:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 02:45:26,693 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:26,693 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:26,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 02:45:26,694 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:26,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:26,694 INFO L85 PathProgramCache]: Analyzing trace with hash 912710034, now seen corresponding path program 1 times [2022-02-24 02:45:26,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:26,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062061219] [2022-02-24 02:45:26,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:26,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:26,697 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:26,697 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:26,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:26,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 02:45:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:26,801 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:26,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062061219] [2022-02-24 02:45:26,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2062061219] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:26,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:26,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:45:26,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246766365] [2022-02-24 02:45:26,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:26,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:45:26,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:26,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:45:26,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:26,802 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:27,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:27,081 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2022-02-24 02:45:27,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 02:45:27,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-02-24 02:45:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:27,083 INFO L225 Difference]: With dead ends: 90 [2022-02-24 02:45:27,083 INFO L226 Difference]: Without dead ends: 57 [2022-02-24 02:45:27,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:45:27,084 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 106 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:27,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 64 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:27,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-24 02:45:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2022-02-24 02:45:27,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-02-24 02:45:27,098 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 33 [2022-02-24 02:45:27,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:27,099 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-02-24 02:45:27,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:27,099 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-02-24 02:45:27,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 02:45:27,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:27,100 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:27,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 02:45:27,100 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:27,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:27,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1010087575, now seen corresponding path program 3 times [2022-02-24 02:45:27,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:27,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777671052] [2022-02-24 02:45:27,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:27,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:27,103 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:27,103 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:27,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:27,520 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:27,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777671052] [2022-02-24 02:45:27,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1777671052] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:27,520 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:27,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:45:27,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971029844] [2022-02-24 02:45:27,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:27,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:45:27,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:27,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:45:27,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:45:27,522 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:28,142 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2022-02-24 02:45:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 02:45:28,142 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 02:45:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:28,143 INFO L225 Difference]: With dead ends: 120 [2022-02-24 02:45:28,143 INFO L226 Difference]: Without dead ends: 99 [2022-02-24 02:45:28,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 02:45:28,145 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 162 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:28,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 68 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:45:28,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-02-24 02:45:28,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 63. [2022-02-24 02:45:28,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.2) internal successors, (66), 56 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:28,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-02-24 02:45:28,174 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 33 [2022-02-24 02:45:28,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:28,174 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-02-24 02:45:28,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:28,174 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-02-24 02:45:28,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 02:45:28,178 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:28,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:28,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 02:45:28,178 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:28,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:28,179 INFO L85 PathProgramCache]: Analyzing trace with hash 925785056, now seen corresponding path program 1 times [2022-02-24 02:45:28,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:28,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231003205] [2022-02-24 02:45:28,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:28,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:28,182 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:28,182 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:28,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:28,506 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 02:45:28,506 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:28,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231003205] [2022-02-24 02:45:28,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1231003205] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:28,507 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:28,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:45:28,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095161552] [2022-02-24 02:45:28,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:28,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:45:28,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:28,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:45:28,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:45:28,509 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:29,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:29,440 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2022-02-24 02:45:29,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 02:45:29,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 02:45:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:29,441 INFO L225 Difference]: With dead ends: 164 [2022-02-24 02:45:29,442 INFO L226 Difference]: Without dead ends: 143 [2022-02-24 02:45:29,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=1733, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 02:45:29,443 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 209 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:29,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 56 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-02-24 02:45:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 71. [2022-02-24 02:45:29,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:29,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-02-24 02:45:29,466 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 38 [2022-02-24 02:45:29,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:29,466 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-02-24 02:45:29,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:29,466 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-02-24 02:45:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 02:45:29,467 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:29,467 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:29,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 02:45:29,468 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:29,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:29,468 INFO L85 PathProgramCache]: Analyzing trace with hash 909842600, now seen corresponding path program 2 times [2022-02-24 02:45:29,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:29,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552178398] [2022-02-24 02:45:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:29,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:29,473 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:29,473 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:30,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:30,032 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:30,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552178398] [2022-02-24 02:45:30,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [552178398] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:30,032 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:30,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:45:30,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422447804] [2022-02-24 02:45:30,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:30,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:45:30,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:30,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:45:30,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:45:30,034 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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 02:45:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:31,280 INFO L93 Difference]: Finished difference Result 202 states and 264 transitions. [2022-02-24 02:45:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 02:45:31,281 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 02:45:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:31,282 INFO L225 Difference]: With dead ends: 202 [2022-02-24 02:45:31,282 INFO L226 Difference]: Without dead ends: 166 [2022-02-24 02:45:31,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=2268, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 02:45:31,284 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 152 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:31,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 80 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:45:31,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-02-24 02:45:31,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 111. [2022-02-24 02:45:31,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 104 states have internal predecessors, (135), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 142 transitions. [2022-02-24 02:45:31,348 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 142 transitions. Word has length 38 [2022-02-24 02:45:31,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:31,349 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 142 transitions. [2022-02-24 02:45:31,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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 02:45:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 142 transitions. [2022-02-24 02:45:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 02:45:31,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:31,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:31,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 02:45:31,351 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:31,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:31,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2114079652, now seen corresponding path program 4 times [2022-02-24 02:45:31,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:31,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664825378] [2022-02-24 02:45:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:31,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:31,355 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:31,355 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:31,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:31,598 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 02:45:31,599 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:31,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664825378] [2022-02-24 02:45:31,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1664825378] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:31,599 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:31,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:45:31,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160903251] [2022-02-24 02:45:31,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:31,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:45:31,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:31,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:45:31,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:45:31,600 INFO L87 Difference]: Start difference. First operand 111 states and 142 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:32,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:32,242 INFO L93 Difference]: Finished difference Result 290 states and 379 transitions. [2022-02-24 02:45:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:45:32,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-24 02:45:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:32,244 INFO L225 Difference]: With dead ends: 290 [2022-02-24 02:45:32,244 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 02:45:32,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:45:32,246 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 194 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:32,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 84 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:32,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 02:45:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 148. [2022-02-24 02:45:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 140 states have (on average 1.292857142857143) internal successors, (181), 141 states have internal predecessors, (181), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 188 transitions. [2022-02-24 02:45:32,301 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 188 transitions. Word has length 39 [2022-02-24 02:45:32,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:32,302 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 188 transitions. [2022-02-24 02:45:32,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:32,302 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 188 transitions. [2022-02-24 02:45:32,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 02:45:32,302 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:32,303 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:32,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 02:45:32,303 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:32,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:32,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1844691523, now seen corresponding path program 2 times [2022-02-24 02:45:32,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:32,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557938739] [2022-02-24 02:45:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:32,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:32,306 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:32,306 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:32,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:32,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 02:45:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:32,511 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:32,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557938739] [2022-02-24 02:45:32,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1557938739] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:32,511 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:32,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:45:32,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131872486] [2022-02-24 02:45:32,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:32,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:45:32,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:32,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:45:32,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:45:32,513 INFO L87 Difference]: Start difference. First operand 148 states and 188 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:33,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:33,188 INFO L93 Difference]: Finished difference Result 207 states and 264 transitions. [2022-02-24 02:45:33,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 02:45:33,189 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-02-24 02:45:33,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:33,190 INFO L225 Difference]: With dead ends: 207 [2022-02-24 02:45:33,190 INFO L226 Difference]: Without dead ends: 205 [2022-02-24 02:45:33,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:45:33,192 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 125 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:33,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 92 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-24 02:45:33,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 171. [2022-02-24 02:45:33,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 160 states have (on average 1.26875) internal successors, (203), 162 states have internal predecessors, (203), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:45:33,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 214 transitions. [2022-02-24 02:45:33,251 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 214 transitions. Word has length 41 [2022-02-24 02:45:33,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:33,251 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 214 transitions. [2022-02-24 02:45:33,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:33,251 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 214 transitions. [2022-02-24 02:45:33,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 02:45:33,253 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:33,253 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:33,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 02:45:33,253 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:33,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1706177446, now seen corresponding path program 5 times [2022-02-24 02:45:33,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:33,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036661435] [2022-02-24 02:45:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:33,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:33,256 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:33,257 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:33,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:33,810 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:33,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036661435] [2022-02-24 02:45:33,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2036661435] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:33,811 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:33,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:45:33,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692472051] [2022-02-24 02:45:33,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:33,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:45:33,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:33,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:45:33,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:45:33,812 INFO L87 Difference]: Start difference. First operand 171 states and 214 transitions. Second operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:34,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:34,748 INFO L93 Difference]: Finished difference Result 251 states and 315 transitions. [2022-02-24 02:45:34,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 02:45:34,748 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-24 02:45:34,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:34,751 INFO L225 Difference]: With dead ends: 251 [2022-02-24 02:45:34,751 INFO L226 Difference]: Without dead ends: 249 [2022-02-24 02:45:34,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 02:45:34,752 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 206 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:34,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 73 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:34,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-02-24 02:45:34,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 196. [2022-02-24 02:45:34,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 183 states have (on average 1.2677595628415301) internal successors, (232), 186 states have internal predecessors, (232), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 245 transitions. [2022-02-24 02:45:34,852 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 245 transitions. Word has length 41 [2022-02-24 02:45:34,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:34,854 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 245 transitions. [2022-02-24 02:45:34,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:34,854 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 245 transitions. [2022-02-24 02:45:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 02:45:34,854 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:34,854 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:34,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 02:45:34,855 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:34,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:34,855 INFO L85 PathProgramCache]: Analyzing trace with hash -336118839, now seen corresponding path program 2 times [2022-02-24 02:45:34,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:34,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420249132] [2022-02-24 02:45:34,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:34,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:34,864 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:34,864 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:34,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:34,940 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:34,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420249132] [2022-02-24 02:45:34,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [420249132] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:34,940 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:34,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:45:34,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152339886] [2022-02-24 02:45:34,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:34,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:45:34,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:34,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:45:34,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:34,943 INFO L87 Difference]: Start difference. First operand 196 states and 245 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 02:45:35,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:35,305 INFO L93 Difference]: Finished difference Result 291 states and 370 transitions. [2022-02-24 02:45:35,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 02:45:35,306 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 43 [2022-02-24 02:45:35,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:35,307 INFO L225 Difference]: With dead ends: 291 [2022-02-24 02:45:35,307 INFO L226 Difference]: Without dead ends: 216 [2022-02-24 02:45:35,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:45:35,308 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 106 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:35,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 56 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:35,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-24 02:45:35,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 169. [2022-02-24 02:45:35,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 156 states have (on average 1.205128205128205) internal successors, (188), 159 states have internal predecessors, (188), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 201 transitions. [2022-02-24 02:45:35,369 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 201 transitions. Word has length 43 [2022-02-24 02:45:35,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:35,369 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 201 transitions. [2022-02-24 02:45:35,369 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 02:45:35,369 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 201 transitions. [2022-02-24 02:45:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 02:45:35,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:35,370 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:35,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 02:45:35,370 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:35,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:35,370 INFO L85 PathProgramCache]: Analyzing trace with hash 364945739, now seen corresponding path program 3 times [2022-02-24 02:45:35,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:35,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075014128] [2022-02-24 02:45:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:35,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:35,373 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:35,373 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:35,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:35,737 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:35,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075014128] [2022-02-24 02:45:35,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2075014128] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:35,738 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:35,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 02:45:35,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897126257] [2022-02-24 02:45:35,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:35,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 02:45:35,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:35,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 02:45:35,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:45:35,739 INFO L87 Difference]: Start difference. First operand 169 states and 201 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 02:45:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:36,889 INFO L93 Difference]: Finished difference Result 245 states and 293 transitions. [2022-02-24 02:45:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 02:45:36,890 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-02-24 02:45:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:36,891 INFO L225 Difference]: With dead ends: 245 [2022-02-24 02:45:36,891 INFO L226 Difference]: Without dead ends: 243 [2022-02-24 02:45:36,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=2361, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 02:45:36,893 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 164 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:36,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 101 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:45:36,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-24 02:45:36,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 132. [2022-02-24 02:45:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 122 states have (on average 1.1967213114754098) internal successors, (146), 123 states have internal predecessors, (146), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:45:36,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2022-02-24 02:45:36,967 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 43 [2022-02-24 02:45:36,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:36,967 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2022-02-24 02:45:36,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 02:45:36,968 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2022-02-24 02:45:36,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 02:45:36,968 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:36,968 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:36,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 02:45:36,969 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:36,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:36,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1980469830, now seen corresponding path program 1 times [2022-02-24 02:45:36,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:36,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336386197] [2022-02-24 02:45:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:36,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:36,974 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:36,975 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:37,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:37,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 02:45:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:37,191 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:37,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336386197] [2022-02-24 02:45:37,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1336386197] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:37,191 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:37,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:45:37,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977042806] [2022-02-24 02:45:37,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:37,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:45:37,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:37,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:45:37,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:45:37,192 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:37,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:37,980 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2022-02-24 02:45:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 02:45:37,981 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-02-24 02:45:37,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:37,982 INFO L225 Difference]: With dead ends: 172 [2022-02-24 02:45:37,982 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 02:45:37,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 02:45:37,983 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 116 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:37,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 103 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:37,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 02:45:38,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2022-02-24 02:45:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 138 states have (on average 1.181159420289855) internal successors, (163), 140 states have internal predecessors, (163), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:38,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 176 transitions. [2022-02-24 02:45:38,056 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 176 transitions. Word has length 46 [2022-02-24 02:45:38,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:38,056 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 176 transitions. [2022-02-24 02:45:38,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:38,056 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 176 transitions. [2022-02-24 02:45:38,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 02:45:38,057 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:38,057 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:38,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 02:45:38,057 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:38,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:38,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1825765489, now seen corresponding path program 3 times [2022-02-24 02:45:38,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:38,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297186368] [2022-02-24 02:45:38,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:38,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:38,060 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:38,060 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:38,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:38,107 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:38,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297186368] [2022-02-24 02:45:38,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1297186368] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:38,108 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:38,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:45:38,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669048497] [2022-02-24 02:45:38,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:38,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:45:38,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:38,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:45:38,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:45:38,109 INFO L87 Difference]: Start difference. First operand 151 states and 176 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 02:45:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:38,313 INFO L93 Difference]: Finished difference Result 195 states and 232 transitions. [2022-02-24 02:45:38,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:45:38,313 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 46 [2022-02-24 02:45:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:38,314 INFO L225 Difference]: With dead ends: 195 [2022-02-24 02:45:38,314 INFO L226 Difference]: Without dead ends: 167 [2022-02-24 02:45:38,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:45:38,315 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 74 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:38,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 67 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-02-24 02:45:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2022-02-24 02:45:38,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 142 states have (on average 1.1901408450704225) internal successors, (169), 144 states have internal predecessors, (169), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 182 transitions. [2022-02-24 02:45:38,382 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 182 transitions. Word has length 46 [2022-02-24 02:45:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:38,382 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 182 transitions. [2022-02-24 02:45:38,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 02:45:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 182 transitions. [2022-02-24 02:45:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 02:45:38,383 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:38,383 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:38,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 02:45:38,383 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:38,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:38,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1458084557, now seen corresponding path program 1 times [2022-02-24 02:45:38,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:38,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318092617] [2022-02-24 02:45:38,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:38,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:38,386 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:38,386 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:38,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:38,872 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:38,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318092617] [2022-02-24 02:45:38,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1318092617] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:38,873 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:38,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 02:45:38,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60232620] [2022-02-24 02:45:38,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:38,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 02:45:38,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 02:45:38,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:45:38,874 INFO L87 Difference]: Start difference. First operand 155 states and 182 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:39,623 INFO L93 Difference]: Finished difference Result 255 states and 305 transitions. [2022-02-24 02:45:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 02:45:39,624 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 02:45:39,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:39,625 INFO L225 Difference]: With dead ends: 255 [2022-02-24 02:45:39,625 INFO L226 Difference]: Without dead ends: 253 [2022-02-24 02:45:39,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 02:45:39,627 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 141 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:39,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 87 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:45:39,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-02-24 02:45:39,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 179. [2022-02-24 02:45:39,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 166 states have (on average 1.216867469879518) internal successors, (202), 168 states have internal predecessors, (202), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 215 transitions. [2022-02-24 02:45:39,708 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 215 transitions. Word has length 46 [2022-02-24 02:45:39,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:39,708 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 215 transitions. [2022-02-24 02:45:39,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:39,708 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 215 transitions. [2022-02-24 02:45:39,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 02:45:39,709 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:39,709 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:39,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 02:45:39,709 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:39,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:39,709 INFO L85 PathProgramCache]: Analyzing trace with hash -253360043, now seen corresponding path program 4 times [2022-02-24 02:45:39,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:39,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951994028] [2022-02-24 02:45:39,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:39,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:39,712 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:39,712 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:40,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:40,247 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 02:45:40,247 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:40,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951994028] [2022-02-24 02:45:40,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1951994028] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:40,247 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:40,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 02:45:40,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213803147] [2022-02-24 02:45:40,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:40,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 02:45:40,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:40,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 02:45:40,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:45:40,249 INFO L87 Difference]: Start difference. First operand 179 states and 215 transitions. Second operand has 26 states, 25 states have (on average 1.68) internal successors, (42), 24 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 02:45:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:41,783 INFO L93 Difference]: Finished difference Result 283 states and 341 transitions. [2022-02-24 02:45:41,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 02:45:41,787 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 02:45:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:41,789 INFO L225 Difference]: With dead ends: 283 [2022-02-24 02:45:41,789 INFO L226 Difference]: Without dead ends: 281 [2022-02-24 02:45:41,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=718, Invalid=2942, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 02:45:41,791 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 319 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:41,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 91 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:45:41,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-24 02:45:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 199. [2022-02-24 02:45:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 184 states have (on average 1.2173913043478262) internal successors, (224), 187 states have internal predecessors, (224), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 02:45:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 239 transitions. [2022-02-24 02:45:41,876 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 239 transitions. Word has length 46 [2022-02-24 02:45:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:41,876 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 239 transitions. [2022-02-24 02:45:41,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 24 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 02:45:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 239 transitions. [2022-02-24 02:45:41,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 02:45:41,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:41,877 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:41,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 02:45:41,877 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:41,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1841707945, now seen corresponding path program 4 times [2022-02-24 02:45:41,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:41,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038541202] [2022-02-24 02:45:41,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:41,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:41,880 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:41,880 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:41,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:41,939 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:41,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038541202] [2022-02-24 02:45:41,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1038541202] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:41,939 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:41,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 02:45:41,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916535931] [2022-02-24 02:45:41,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:41,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 02:45:41,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:41,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 02:45:41,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:45:41,940 INFO L87 Difference]: Start difference. First operand 199 states and 239 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:42,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:42,231 INFO L93 Difference]: Finished difference Result 323 states and 394 transitions. [2022-02-24 02:45:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:45:42,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 02:45:42,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:42,233 INFO L225 Difference]: With dead ends: 323 [2022-02-24 02:45:42,233 INFO L226 Difference]: Without dead ends: 216 [2022-02-24 02:45:42,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:45:42,234 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 121 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:42,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 53 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:42,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-24 02:45:42,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 154. [2022-02-24 02:45:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 144 states have (on average 1.1736111111111112) internal successors, (169), 145 states have internal predecessors, (169), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:45:42,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 178 transitions. [2022-02-24 02:45:42,318 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 178 transitions. Word has length 46 [2022-02-24 02:45:42,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:42,318 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 178 transitions. [2022-02-24 02:45:42,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:42,318 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 178 transitions. [2022-02-24 02:45:42,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 02:45:42,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:42,319 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:42,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 02:45:42,319 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:42,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:42,320 INFO L85 PathProgramCache]: Analyzing trace with hash -966082275, now seen corresponding path program 3 times [2022-02-24 02:45:42,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:42,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518042463] [2022-02-24 02:45:42,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:42,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:42,323 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:42,324 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:42,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:42,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 02:45:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:42,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 02:45:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:42,459 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:42,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518042463] [2022-02-24 02:45:42,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1518042463] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:42,459 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:42,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:45:42,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207365175] [2022-02-24 02:45:42,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:42,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:45:42,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:42,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:45:42,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:45:42,460 INFO L87 Difference]: Start difference. First operand 154 states and 178 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:42,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:42,891 INFO L93 Difference]: Finished difference Result 213 states and 249 transitions. [2022-02-24 02:45:42,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:45:42,891 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2022-02-24 02:45:42,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:42,892 INFO L225 Difference]: With dead ends: 213 [2022-02-24 02:45:42,892 INFO L226 Difference]: Without dead ends: 186 [2022-02-24 02:45:42,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:45:42,893 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 153 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:42,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 79 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:45:42,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-02-24 02:45:42,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2022-02-24 02:45:42,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 139 states have (on average 1.1510791366906474) internal successors, (160), 141 states have internal predecessors, (160), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:45:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2022-02-24 02:45:42,971 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 49 [2022-02-24 02:45:42,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:42,971 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2022-02-24 02:45:42,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:45:42,971 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2022-02-24 02:45:42,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 02:45:42,972 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:42,972 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:42,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 02:45:42,972 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:42,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:42,972 INFO L85 PathProgramCache]: Analyzing trace with hash -146750412, now seen corresponding path program 4 times [2022-02-24 02:45:42,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:42,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771877727] [2022-02-24 02:45:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:42,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:42,975 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:42,975 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:43,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:43,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 02:45:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:43,242 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:43,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771877727] [2022-02-24 02:45:43,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1771877727] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:43,243 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:43,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:45:43,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899932970] [2022-02-24 02:45:43,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:43,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:45:43,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:43,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:45:43,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:45:43,244 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:43,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:43,985 INFO L93 Difference]: Finished difference Result 197 states and 228 transitions. [2022-02-24 02:45:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 02:45:43,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-02-24 02:45:43,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:43,988 INFO L225 Difference]: With dead ends: 197 [2022-02-24 02:45:43,988 INFO L226 Difference]: Without dead ends: 195 [2022-02-24 02:45:43,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:45:43,989 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 141 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:43,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 94 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:43,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-02-24 02:45:44,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 175. [2022-02-24 02:45:44,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 162 states have (on average 1.154320987654321) internal successors, (187), 165 states have internal predecessors, (187), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:44,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 201 transitions. [2022-02-24 02:45:44,085 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 201 transitions. Word has length 49 [2022-02-24 02:45:44,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:44,085 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 201 transitions. [2022-02-24 02:45:44,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:44,086 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 201 transitions. [2022-02-24 02:45:44,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 02:45:44,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:44,086 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:44,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 02:45:44,087 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:44,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:44,087 INFO L85 PathProgramCache]: Analyzing trace with hash 554440741, now seen corresponding path program 1 times [2022-02-24 02:45:44,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:44,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787013889] [2022-02-24 02:45:44,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:44,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:44,090 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:44,090 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:44,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:44,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 02:45:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:44,760 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:44,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787013889] [2022-02-24 02:45:44,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [787013889] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:44,760 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:44,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 02:45:44,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002742882] [2022-02-24 02:45:44,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:44,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 02:45:44,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:44,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 02:45:44,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:45:44,762 INFO L87 Difference]: Start difference. First operand 175 states and 201 transitions. Second operand has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:46,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:46,095 INFO L93 Difference]: Finished difference Result 241 states and 274 transitions. [2022-02-24 02:45:46,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 02:45:46,095 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-02-24 02:45:46,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:46,096 INFO L225 Difference]: With dead ends: 241 [2022-02-24 02:45:46,096 INFO L226 Difference]: Without dead ends: 209 [2022-02-24 02:45:46,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=461, Invalid=2845, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 02:45:46,098 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 161 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:46,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 70 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:45:46,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-02-24 02:45:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 188. [2022-02-24 02:45:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 175 states have (on average 1.1428571428571428) internal successors, (200), 178 states have internal predecessors, (200), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 214 transitions. [2022-02-24 02:45:46,205 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 214 transitions. Word has length 51 [2022-02-24 02:45:46,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:46,205 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 214 transitions. [2022-02-24 02:45:46,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 214 transitions. [2022-02-24 02:45:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 02:45:46,206 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:46,206 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:46,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 02:45:46,206 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:46,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:46,206 INFO L85 PathProgramCache]: Analyzing trace with hash 455716478, now seen corresponding path program 1 times [2022-02-24 02:45:46,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:46,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267604685] [2022-02-24 02:45:46,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:46,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:46,209 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:46,209 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:46,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:46,255 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:46,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267604685] [2022-02-24 02:45:46,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1267604685] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:46,255 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:46,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:45:46,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748297659] [2022-02-24 02:45:46,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:46,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:45:46,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:46,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:45:46,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:45:46,258 INFO L87 Difference]: Start difference. First operand 188 states and 214 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:46,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:46,522 INFO L93 Difference]: Finished difference Result 257 states and 298 transitions. [2022-02-24 02:45:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 02:45:46,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 51 [2022-02-24 02:45:46,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:46,524 INFO L225 Difference]: With dead ends: 257 [2022-02-24 02:45:46,524 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 02:45:46,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:45:46,525 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:46,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 59 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 02:45:46,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 188. [2022-02-24 02:45:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 175 states have (on average 1.1371428571428572) internal successors, (199), 178 states have internal predecessors, (199), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:46,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 213 transitions. [2022-02-24 02:45:46,613 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 213 transitions. Word has length 51 [2022-02-24 02:45:46,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:46,613 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 213 transitions. [2022-02-24 02:45:46,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:46,613 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 213 transitions. [2022-02-24 02:45:46,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 02:45:46,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:46,614 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:46,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 02:45:46,614 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:46,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:46,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1181899854, now seen corresponding path program 1 times [2022-02-24 02:45:46,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:46,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825579849] [2022-02-24 02:45:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:46,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:46,617 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:46,617 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:47,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:47,316 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:47,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825579849] [2022-02-24 02:45:47,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [825579849] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:47,317 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:47,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 02:45:47,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190983095] [2022-02-24 02:45:47,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:47,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 02:45:47,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:47,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 02:45:47,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:45:47,318 INFO L87 Difference]: Start difference. First operand 188 states and 213 transitions. Second operand has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:48,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:48,875 INFO L93 Difference]: Finished difference Result 315 states and 367 transitions. [2022-02-24 02:45:48,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 02:45:48,875 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-24 02:45:48,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:48,876 INFO L225 Difference]: With dead ends: 315 [2022-02-24 02:45:48,876 INFO L226 Difference]: Without dead ends: 313 [2022-02-24 02:45:48,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=530, Invalid=3010, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 02:45:48,877 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 218 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:48,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 74 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:45:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-24 02:45:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 219. [2022-02-24 02:45:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 206 states have (on average 1.1650485436893203) internal successors, (240), 209 states have internal predecessors, (240), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:48,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 254 transitions. [2022-02-24 02:45:48,973 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 254 transitions. Word has length 51 [2022-02-24 02:45:48,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:48,973 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 254 transitions. [2022-02-24 02:45:48,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:48,973 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 254 transitions. [2022-02-24 02:45:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 02:45:48,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:48,974 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:48,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 02:45:48,974 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:48,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:48,974 INFO L85 PathProgramCache]: Analyzing trace with hash -186725060, now seen corresponding path program 5 times [2022-02-24 02:45:48,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:48,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192861164] [2022-02-24 02:45:48,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:48,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:48,977 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:48,977 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:49,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:49,620 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 02:45:49,620 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:49,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192861164] [2022-02-24 02:45:49,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [192861164] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:49,620 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:49,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 02:45:49,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732199103] [2022-02-24 02:45:49,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:49,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 02:45:49,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:49,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 02:45:49,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:45:49,622 INFO L87 Difference]: Start difference. First operand 219 states and 254 transitions. Second operand has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:50,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:50,999 INFO L93 Difference]: Finished difference Result 305 states and 355 transitions. [2022-02-24 02:45:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 02:45:50,999 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-24 02:45:50,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:51,000 INFO L225 Difference]: With dead ends: 305 [2022-02-24 02:45:51,000 INFO L226 Difference]: Without dead ends: 303 [2022-02-24 02:45:51,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=439, Invalid=2867, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 02:45:51,002 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 198 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:51,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 59 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:45:51,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-02-24 02:45:51,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 229. [2022-02-24 02:45:51,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 215 states have (on average 1.1674418604651162) internal successors, (251), 218 states have internal predecessors, (251), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 265 transitions. [2022-02-24 02:45:51,108 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 265 transitions. Word has length 51 [2022-02-24 02:45:51,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:51,108 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 265 transitions. [2022-02-24 02:45:51,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:51,108 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 265 transitions. [2022-02-24 02:45:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 02:45:51,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:51,109 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:51,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 02:45:51,109 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:51,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:51,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1824744982, now seen corresponding path program 2 times [2022-02-24 02:45:51,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:51,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528368836] [2022-02-24 02:45:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:51,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:51,112 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:51,112 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:51,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:51,672 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 02:45:51,673 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:51,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528368836] [2022-02-24 02:45:51,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1528368836] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:51,673 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:51,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 02:45:51,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375231091] [2022-02-24 02:45:51,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:51,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 02:45:51,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:51,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 02:45:51,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:45:51,674 INFO L87 Difference]: Start difference. First operand 229 states and 265 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:52,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:52,565 INFO L93 Difference]: Finished difference Result 268 states and 311 transitions. [2022-02-24 02:45:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 02:45:52,566 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have 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 02:45:52,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:52,567 INFO L225 Difference]: With dead ends: 268 [2022-02-24 02:45:52,567 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 02:45:52,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=1791, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 02:45:52,568 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 114 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:52,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 91 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:52,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 02:45:52,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 232. [2022-02-24 02:45:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 218 states have (on average 1.1697247706422018) internal successors, (255), 221 states have internal predecessors, (255), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 02:45:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 269 transitions. [2022-02-24 02:45:52,718 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 269 transitions. Word has length 51 [2022-02-24 02:45:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:52,718 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 269 transitions. [2022-02-24 02:45:52,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 269 transitions. [2022-02-24 02:45:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 02:45:52,719 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:52,719 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:52,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 02:45:52,720 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:52,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:52,720 INFO L85 PathProgramCache]: Analyzing trace with hash 636186535, now seen corresponding path program 1 times [2022-02-24 02:45:52,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:52,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21217323] [2022-02-24 02:45:52,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:52,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:52,725 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:52,725 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:52,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:52,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-24 02:45:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:52,989 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 02:45:52,989 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:52,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21217323] [2022-02-24 02:45:52,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [21217323] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:52,989 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:52,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:45:52,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391305809] [2022-02-24 02:45:52,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:52,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:45:52,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:52,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:45:52,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:45:52,991 INFO L87 Difference]: Start difference. First operand 232 states and 269 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:54,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:54,031 INFO L93 Difference]: Finished difference Result 448 states and 537 transitions. [2022-02-24 02:45:54,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 02:45:54,031 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-02-24 02:45:54,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:54,033 INFO L225 Difference]: With dead ends: 448 [2022-02-24 02:45:54,033 INFO L226 Difference]: Without dead ends: 360 [2022-02-24 02:45:54,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=2045, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 02:45:54,034 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 197 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:54,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 85 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:45:54,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-02-24 02:45:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 271. [2022-02-24 02:45:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 253 states have (on average 1.1699604743083003) internal successors, (296), 258 states have internal predecessors, (296), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-24 02:45:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 316 transitions. [2022-02-24 02:45:54,225 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 316 transitions. Word has length 54 [2022-02-24 02:45:54,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:54,225 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 316 transitions. [2022-02-24 02:45:54,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 316 transitions. [2022-02-24 02:45:54,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 02:45:54,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:54,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:54,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 02:45:54,227 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:54,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:54,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1518785839, now seen corresponding path program 2 times [2022-02-24 02:45:54,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:54,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433293330] [2022-02-24 02:45:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:54,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:54,230 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:54,230 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:54,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:54,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-24 02:45:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:54,741 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:54,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433293330] [2022-02-24 02:45:54,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [433293330] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:54,741 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:54,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 02:45:54,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561470803] [2022-02-24 02:45:54,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:54,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 02:45:54,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:54,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 02:45:54,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:45:54,743 INFO L87 Difference]: Start difference. First operand 271 states and 316 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:56,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:56,131 INFO L93 Difference]: Finished difference Result 337 states and 395 transitions. [2022-02-24 02:45:56,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 02:45:56,132 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-02-24 02:45:56,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:56,133 INFO L225 Difference]: With dead ends: 337 [2022-02-24 02:45:56,133 INFO L226 Difference]: Without dead ends: 335 [2022-02-24 02:45:56,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=419, Invalid=2443, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 02:45:56,135 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 198 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:56,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 114 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:45:56,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-02-24 02:45:56,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 280. [2022-02-24 02:45:56,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 261 states have (on average 1.1724137931034482) internal successors, (306), 267 states have internal predecessors, (306), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 5 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-24 02:45:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 328 transitions. [2022-02-24 02:45:56,292 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 328 transitions. Word has length 54 [2022-02-24 02:45:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:56,292 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 328 transitions. [2022-02-24 02:45:56,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 328 transitions. [2022-02-24 02:45:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 02:45:56,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:56,293 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:56,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 02:45:56,294 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:56,294 INFO L85 PathProgramCache]: Analyzing trace with hash -676055644, now seen corresponding path program 2 times [2022-02-24 02:45:56,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:56,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100470112] [2022-02-24 02:45:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:56,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:56,296 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:56,297 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:57,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:57,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-24 02:45:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:57,116 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:57,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100470112] [2022-02-24 02:45:57,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100470112] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:57,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:57,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 02:45:57,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088577603] [2022-02-24 02:45:57,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:57,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 02:45:57,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:57,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 02:45:57,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:45:57,117 INFO L87 Difference]: Start difference. First operand 280 states and 328 transitions. Second operand has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:59,771 INFO L93 Difference]: Finished difference Result 345 states and 407 transitions. [2022-02-24 02:45:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 02:45:59,771 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-02-24 02:45:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:59,773 INFO L225 Difference]: With dead ends: 345 [2022-02-24 02:45:59,773 INFO L226 Difference]: Without dead ends: 299 [2022-02-24 02:45:59,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=821, Invalid=5185, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 02:45:59,775 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 179 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:59,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 118 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:45:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-24 02:45:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 227. [2022-02-24 02:45:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 211 states have (on average 1.1990521327014219) internal successors, (253), 216 states have internal predecessors, (253), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-24 02:45:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 272 transitions. [2022-02-24 02:45:59,924 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 272 transitions. Word has length 56 [2022-02-24 02:45:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:59,925 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 272 transitions. [2022-02-24 02:45:59,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 272 transitions. [2022-02-24 02:45:59,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 02:45:59,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:59,926 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:59,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 02:45:59,926 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:59,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:59,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1953283570, now seen corresponding path program 5 times [2022-02-24 02:45:59,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:59,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14946936] [2022-02-24 02:45:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:59,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:59,929 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:59,929 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:00,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:00,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 02:46:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:00,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 02:46:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:00,218 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 02:46:00,219 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:00,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14946936] [2022-02-24 02:46:00,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [14946936] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:00,219 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:00,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:46:00,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180367832] [2022-02-24 02:46:00,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:00,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:46:00,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:00,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:46:00,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:46:00,220 INFO L87 Difference]: Start difference. First operand 227 states and 272 transitions. Second operand has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:01,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:01,133 INFO L93 Difference]: Finished difference Result 316 states and 380 transitions. [2022-02-24 02:46:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 02:46:01,133 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-02-24 02:46:01,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:01,135 INFO L225 Difference]: With dead ends: 316 [2022-02-24 02:46:01,135 INFO L226 Difference]: Without dead ends: 314 [2022-02-24 02:46:01,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:46:01,136 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 163 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:01,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 96 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:01,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-24 02:46:01,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 265. [2022-02-24 02:46:01,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 241 states have (on average 1.1867219917012448) internal successors, (286), 249 states have internal predecessors, (286), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-24 02:46:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 319 transitions. [2022-02-24 02:46:01,310 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 319 transitions. Word has length 57 [2022-02-24 02:46:01,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:01,310 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 319 transitions. [2022-02-24 02:46:01,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:01,310 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 319 transitions. [2022-02-24 02:46:01,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 02:46:01,311 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:01,311 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:01,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 02:46:01,312 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:01,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:01,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1367177809, now seen corresponding path program 3 times [2022-02-24 02:46:01,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:01,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296272995] [2022-02-24 02:46:01,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:01,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:01,316 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:01,316 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:01,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:01,799 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:01,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296272995] [2022-02-24 02:46:01,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1296272995] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:01,799 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:01,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:46:01,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687484328] [2022-02-24 02:46:01,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:01,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:46:01,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:01,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:46:01,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:46:01,800 INFO L87 Difference]: Start difference. First operand 265 states and 319 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:03,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:03,293 INFO L93 Difference]: Finished difference Result 342 states and 414 transitions. [2022-02-24 02:46:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 02:46:03,293 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 56 [2022-02-24 02:46:03,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:03,295 INFO L225 Difference]: With dead ends: 342 [2022-02-24 02:46:03,295 INFO L226 Difference]: Without dead ends: 340 [2022-02-24 02:46:03,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=432, Invalid=2648, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 02:46:03,296 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 125 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:03,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 101 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:46:03,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-02-24 02:46:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 278. [2022-02-24 02:46:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 254 states have (on average 1.1929133858267718) internal successors, (303), 262 states have internal predecessors, (303), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-24 02:46:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 336 transitions. [2022-02-24 02:46:03,462 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 336 transitions. Word has length 56 [2022-02-24 02:46:03,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:03,462 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 336 transitions. [2022-02-24 02:46:03,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 336 transitions. [2022-02-24 02:46:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 02:46:03,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:03,464 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:03,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 02:46:03,464 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:03,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:03,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1889457963, now seen corresponding path program 4 times [2022-02-24 02:46:03,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:03,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531425104] [2022-02-24 02:46:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:03,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:03,467 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:03,467 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:03,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:04,002 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 02:46:04,003 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:04,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531425104] [2022-02-24 02:46:04,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [531425104] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:04,003 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:04,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 02:46:04,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717258495] [2022-02-24 02:46:04,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:04,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 02:46:04,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:04,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 02:46:04,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:46:04,004 INFO L87 Difference]: Start difference. First operand 278 states and 336 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:05,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:05,331 INFO L93 Difference]: Finished difference Result 327 states and 395 transitions. [2022-02-24 02:46:05,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 02:46:05,331 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 02:46:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:05,332 INFO L225 Difference]: With dead ends: 327 [2022-02-24 02:46:05,332 INFO L226 Difference]: Without dead ends: 325 [2022-02-24 02:46:05,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=442, Invalid=2210, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 02:46:05,333 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 166 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:05,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 82 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-02-24 02:46:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 282. [2022-02-24 02:46:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 257 states have (on average 1.1906614785992218) internal successors, (306), 265 states have internal predecessors, (306), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-24 02:46:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 339 transitions. [2022-02-24 02:46:05,564 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 339 transitions. Word has length 56 [2022-02-24 02:46:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:05,564 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 339 transitions. [2022-02-24 02:46:05,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 339 transitions. [2022-02-24 02:46:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 02:46:05,566 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:05,566 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:05,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 02:46:05,566 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:05,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:05,566 INFO L85 PathProgramCache]: Analyzing trace with hash 997874079, now seen corresponding path program 2 times [2022-02-24 02:46:05,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:05,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027218827] [2022-02-24 02:46:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:05,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:05,570 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:05,570 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:05,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:05,754 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:05,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027218827] [2022-02-24 02:46:05,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027218827] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:05,754 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:05,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:46:05,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61239323] [2022-02-24 02:46:05,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:05,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:46:05,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:05,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:46:05,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:46:05,755 INFO L87 Difference]: Start difference. First operand 282 states and 339 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:06,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:06,526 INFO L93 Difference]: Finished difference Result 644 states and 780 transitions. [2022-02-24 02:46:06,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:46:06,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-02-24 02:46:06,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:06,529 INFO L225 Difference]: With dead ends: 644 [2022-02-24 02:46:06,529 INFO L226 Difference]: Without dead ends: 503 [2022-02-24 02:46:06,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:46:06,530 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 244 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:06,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 97 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:46:06,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-02-24 02:46:06,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 369. [2022-02-24 02:46:06,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 344 states have (on average 1.1715116279069768) internal successors, (403), 352 states have internal predecessors, (403), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-24 02:46:06,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 436 transitions. [2022-02-24 02:46:06,759 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 436 transitions. Word has length 57 [2022-02-24 02:46:06,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:06,759 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 436 transitions. [2022-02-24 02:46:06,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 436 transitions. [2022-02-24 02:46:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 02:46:06,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:06,761 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:06,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 02:46:06,761 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:06,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:06,761 INFO L85 PathProgramCache]: Analyzing trace with hash 358973142, now seen corresponding path program 1 times [2022-02-24 02:46:06,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:06,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989595112] [2022-02-24 02:46:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:06,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:06,764 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:06,764 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:07,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:07,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-24 02:46:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:07,129 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:07,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989595112] [2022-02-24 02:46:07,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1989595112] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:07,129 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:07,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:46:07,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524565246] [2022-02-24 02:46:07,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:07,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:46:07,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:07,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:46:07,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:46:07,130 INFO L87 Difference]: Start difference. First operand 369 states and 436 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:08,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:08,813 INFO L93 Difference]: Finished difference Result 458 states and 542 transitions. [2022-02-24 02:46:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 02:46:08,813 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2022-02-24 02:46:08,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:08,815 INFO L225 Difference]: With dead ends: 458 [2022-02-24 02:46:08,815 INFO L226 Difference]: Without dead ends: 456 [2022-02-24 02:46:08,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=505, Invalid=3401, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 02:46:08,816 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 249 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:08,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 106 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:46:08,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-02-24 02:46:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 370. [2022-02-24 02:46:09,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 345 states have (on average 1.1710144927536232) internal successors, (404), 353 states have internal predecessors, (404), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-24 02:46:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 437 transitions. [2022-02-24 02:46:09,036 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 437 transitions. Word has length 59 [2022-02-24 02:46:09,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:09,036 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 437 transitions. [2022-02-24 02:46:09,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:09,037 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 437 transitions. [2022-02-24 02:46:09,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 02:46:09,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:09,038 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:09,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 02:46:09,038 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:09,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:09,038 INFO L85 PathProgramCache]: Analyzing trace with hash 356238102, now seen corresponding path program 3 times [2022-02-24 02:46:09,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:09,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028425355] [2022-02-24 02:46:09,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:09,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:09,041 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:09,041 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:09,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:09,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-24 02:46:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:09,879 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 02:46:09,880 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:09,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028425355] [2022-02-24 02:46:09,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2028425355] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:09,880 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:09,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 02:46:09,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740186314] [2022-02-24 02:46:09,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:09,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 02:46:09,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:09,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 02:46:09,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:46:09,881 INFO L87 Difference]: Start difference. First operand 370 states and 437 transitions. Second operand has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:12,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:12,321 INFO L93 Difference]: Finished difference Result 481 states and 564 transitions. [2022-02-24 02:46:12,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 02:46:12,322 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2022-02-24 02:46:12,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:12,323 INFO L225 Difference]: With dead ends: 481 [2022-02-24 02:46:12,323 INFO L226 Difference]: Without dead ends: 479 [2022-02-24 02:46:12,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1792 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=759, Invalid=5247, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 02:46:12,325 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 164 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:12,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 113 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1646 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:46:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-02-24 02:46:12,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 419. [2022-02-24 02:46:12,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 393 states have (on average 1.1653944020356235) internal successors, (458), 401 states have internal predecessors, (458), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (17), 9 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 02:46:12,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 493 transitions. [2022-02-24 02:46:12,580 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 493 transitions. Word has length 59 [2022-02-24 02:46:12,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:12,580 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 493 transitions. [2022-02-24 02:46:12,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:12,580 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 493 transitions. [2022-02-24 02:46:12,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 02:46:12,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:12,582 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:12,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 02:46:12,582 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:12,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:12,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1033874973, now seen corresponding path program 3 times [2022-02-24 02:46:12,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:12,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409642914] [2022-02-24 02:46:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:12,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:12,585 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:12,585 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:13,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:13,052 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 02:46:13,052 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:13,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409642914] [2022-02-24 02:46:13,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1409642914] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:13,052 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:13,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:46:13,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070220682] [2022-02-24 02:46:13,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:13,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:46:13,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:13,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:46:13,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:46:13,053 INFO L87 Difference]: Start difference. First operand 419 states and 493 transitions. Second operand has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:14,929 INFO L93 Difference]: Finished difference Result 584 states and 693 transitions. [2022-02-24 02:46:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 02:46:14,929 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 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 59 [2022-02-24 02:46:14,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:14,931 INFO L225 Difference]: With dead ends: 584 [2022-02-24 02:46:14,931 INFO L226 Difference]: Without dead ends: 582 [2022-02-24 02:46:14,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=720, Invalid=3440, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 02:46:14,932 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 242 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:14,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 81 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:46:14,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-02-24 02:46:15,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 483. [2022-02-24 02:46:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 455 states have (on average 1.1758241758241759) internal successors, (535), 464 states have internal predecessors, (535), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (18), 9 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-24 02:46:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 572 transitions. [2022-02-24 02:46:15,237 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 572 transitions. Word has length 59 [2022-02-24 02:46:15,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:15,237 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 572 transitions. [2022-02-24 02:46:15,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:15,237 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 572 transitions. [2022-02-24 02:46:15,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 02:46:15,243 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:15,244 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:15,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 02:46:15,244 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:15,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:15,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1495218077, now seen corresponding path program 4 times [2022-02-24 02:46:15,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:15,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936245637] [2022-02-24 02:46:15,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:15,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:15,247 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:15,247 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:15,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:15,954 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:15,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936245637] [2022-02-24 02:46:15,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [936245637] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:15,954 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:15,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 02:46:15,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253615347] [2022-02-24 02:46:15,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:15,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 02:46:15,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:15,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 02:46:15,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:46:15,955 INFO L87 Difference]: Start difference. First operand 483 states and 572 transitions. Second operand has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 02:46:17,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:17,579 INFO L93 Difference]: Finished difference Result 597 states and 710 transitions. [2022-02-24 02:46:17,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 02:46:17,579 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-24 02:46:17,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:17,582 INFO L225 Difference]: With dead ends: 597 [2022-02-24 02:46:17,582 INFO L226 Difference]: Without dead ends: 595 [2022-02-24 02:46:17,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=582, Invalid=3078, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 02:46:17,583 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 359 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:17,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 78 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:46:17,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-02-24 02:46:17,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 489. [2022-02-24 02:46:17,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 462 states have (on average 1.1818181818181819) internal successors, (546), 470 states have internal predecessors, (546), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (17), 9 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 02:46:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 581 transitions. [2022-02-24 02:46:17,995 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 581 transitions. Word has length 59 [2022-02-24 02:46:17,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:17,995 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 581 transitions. [2022-02-24 02:46:17,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 02:46:17,996 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 581 transitions. [2022-02-24 02:46:17,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 02:46:17,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:17,997 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:17,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 02:46:17,997 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:17,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:17,998 INFO L85 PathProgramCache]: Analyzing trace with hash -989126035, now seen corresponding path program 6 times [2022-02-24 02:46:17,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:17,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133047065] [2022-02-24 02:46:17,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:17,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:18,001 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:18,001 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:18,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:18,751 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:18,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133047065] [2022-02-24 02:46:18,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [133047065] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:18,751 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:18,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 02:46:18,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537394402] [2022-02-24 02:46:18,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:18,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 02:46:18,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:18,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 02:46:18,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:46:18,752 INFO L87 Difference]: Start difference. First operand 489 states and 581 transitions. Second operand has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 02:46:20,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:20,938 INFO L93 Difference]: Finished difference Result 722 states and 862 transitions. [2022-02-24 02:46:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 02:46:20,939 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-24 02:46:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:20,942 INFO L225 Difference]: With dead ends: 722 [2022-02-24 02:46:20,942 INFO L226 Difference]: Without dead ends: 720 [2022-02-24 02:46:20,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=625, Invalid=4345, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 02:46:20,944 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 269 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:20,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 107 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:46:20,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-02-24 02:46:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 481. [2022-02-24 02:46:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 456 states have (on average 1.1842105263157894) internal successors, (540), 464 states have internal predecessors, (540), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 7 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-24 02:46:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 571 transitions. [2022-02-24 02:46:21,387 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 571 transitions. Word has length 59 [2022-02-24 02:46:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:21,387 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 571 transitions. [2022-02-24 02:46:21,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 02:46:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 571 transitions. [2022-02-24 02:46:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 02:46:21,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:21,389 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:21,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 02:46:21,389 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:21,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1813715541, now seen corresponding path program 5 times [2022-02-24 02:46:21,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:21,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272494420] [2022-02-24 02:46:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:21,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:21,392 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:21,393 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:22,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:22,157 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:22,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272494420] [2022-02-24 02:46:22,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [272494420] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:22,157 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:22,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 02:46:22,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258975037] [2022-02-24 02:46:22,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:22,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 02:46:22,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:22,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 02:46:22,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:46:22,158 INFO L87 Difference]: Start difference. First operand 481 states and 571 transitions. Second operand has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:23,547 INFO L93 Difference]: Finished difference Result 601 states and 713 transitions. [2022-02-24 02:46:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 02:46:23,547 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 59 [2022-02-24 02:46:23,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:23,549 INFO L225 Difference]: With dead ends: 601 [2022-02-24 02:46:23,549 INFO L226 Difference]: Without dead ends: 599 [2022-02-24 02:46:23,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=443, Invalid=2527, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 02:46:23,549 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 225 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:23,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 92 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:23,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-02-24 02:46:23,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 511. [2022-02-24 02:46:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 486 states have (on average 1.191358024691358) internal successors, (579), 494 states have internal predecessors, (579), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 7 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-24 02:46:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 610 transitions. [2022-02-24 02:46:23,904 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 610 transitions. Word has length 59 [2022-02-24 02:46:23,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:23,904 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 610 transitions. [2022-02-24 02:46:23,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:23,904 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 610 transitions. [2022-02-24 02:46:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 02:46:23,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:23,905 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:23,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 02:46:23,906 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:23,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:23,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1054815615, now seen corresponding path program 2 times [2022-02-24 02:46:23,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:23,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371015579] [2022-02-24 02:46:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:23,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:23,909 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:23,909 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:24,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:24,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-24 02:46:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:24,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 02:46:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:24,300 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:24,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371015579] [2022-02-24 02:46:24,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [371015579] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:24,300 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:24,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 02:46:24,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692115447] [2022-02-24 02:46:24,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:24,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 02:46:24,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:24,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 02:46:24,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:46:24,304 INFO L87 Difference]: Start difference. First operand 511 states and 610 transitions. Second operand has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:25,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:25,533 INFO L93 Difference]: Finished difference Result 604 states and 720 transitions. [2022-02-24 02:46:25,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 02:46:25,533 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-02-24 02:46:25,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:25,535 INFO L225 Difference]: With dead ends: 604 [2022-02-24 02:46:25,535 INFO L226 Difference]: Without dead ends: 602 [2022-02-24 02:46:25,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1463, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 02:46:25,535 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 202 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:25,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 86 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:25,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-02-24 02:46:25,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 531. [2022-02-24 02:46:25,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 501 states have (on average 1.18562874251497) internal successors, (594), 511 states have internal predecessors, (594), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (19), 9 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-24 02:46:25,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 633 transitions. [2022-02-24 02:46:25,904 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 633 transitions. Word has length 62 [2022-02-24 02:46:25,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:25,904 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 633 transitions. [2022-02-24 02:46:25,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 633 transitions. [2022-02-24 02:46:25,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 02:46:25,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:25,905 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:25,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 02:46:25,905 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:25,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1873320726, now seen corresponding path program 3 times [2022-02-24 02:46:25,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:25,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885816890] [2022-02-24 02:46:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:25,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:25,908 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:25,908 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:26,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:26,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 02:46:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:26,381 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:26,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885816890] [2022-02-24 02:46:26,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1885816890] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:26,381 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:26,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 02:46:26,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630178264] [2022-02-24 02:46:26,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:26,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 02:46:26,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:26,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 02:46:26,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:46:26,382 INFO L87 Difference]: Start difference. First operand 531 states and 633 transitions. Second operand has 26 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:28,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:28,065 INFO L93 Difference]: Finished difference Result 729 states and 875 transitions. [2022-02-24 02:46:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 02:46:28,065 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-02-24 02:46:28,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:28,067 INFO L225 Difference]: With dead ends: 729 [2022-02-24 02:46:28,067 INFO L226 Difference]: Without dead ends: 663 [2022-02-24 02:46:28,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=403, Invalid=3629, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 02:46:28,068 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 221 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:28,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 101 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:46:28,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-02-24 02:46:28,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 587. [2022-02-24 02:46:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 550 states have (on average 1.1836363636363636) internal successors, (651), 564 states have internal predecessors, (651), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-24 02:46:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 702 transitions. [2022-02-24 02:46:28,447 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 702 transitions. Word has length 62 [2022-02-24 02:46:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:28,447 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 702 transitions. [2022-02-24 02:46:28,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:28,448 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 702 transitions. [2022-02-24 02:46:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 02:46:28,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:28,449 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:28,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 02:46:28,449 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:28,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:28,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2048520356, now seen corresponding path program 4 times [2022-02-24 02:46:28,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:28,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776157345] [2022-02-24 02:46:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:28,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:28,452 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:28,453 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:28,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:28,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-24 02:46:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:28,821 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 02:46:28,821 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:28,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776157345] [2022-02-24 02:46:28,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1776157345] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:28,821 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:28,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:46:28,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203609912] [2022-02-24 02:46:28,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:28,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:46:28,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:28,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:46:28,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:46:28,822 INFO L87 Difference]: Start difference. First operand 587 states and 702 transitions. Second operand has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:30,402 INFO L93 Difference]: Finished difference Result 732 states and 881 transitions. [2022-02-24 02:46:30,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 02:46:30,402 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-02-24 02:46:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:30,405 INFO L225 Difference]: With dead ends: 732 [2022-02-24 02:46:30,405 INFO L226 Difference]: Without dead ends: 730 [2022-02-24 02:46:30,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=348, Invalid=2304, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 02:46:30,405 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 255 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:30,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 87 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:46:30,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-02-24 02:46:30,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 617. [2022-02-24 02:46:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 578 states have (on average 1.1885813148788926) internal successors, (687), 593 states have internal predecessors, (687), 27 states have call successors, (27), 12 states have call predecessors, (27), 11 states have return successors, (26), 11 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-24 02:46:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 740 transitions. [2022-02-24 02:46:30,816 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 740 transitions. Word has length 62 [2022-02-24 02:46:30,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:30,816 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 740 transitions. [2022-02-24 02:46:30,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 740 transitions. [2022-02-24 02:46:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 02:46:30,817 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:30,817 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:30,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 02:46:30,818 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:30,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:30,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1516193256, now seen corresponding path program 6 times [2022-02-24 02:46:30,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:30,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185765542] [2022-02-24 02:46:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:30,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:30,820 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:30,820 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:30,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:30,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 02:46:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:30,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 02:46:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:30,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 02:46:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:30,974 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:30,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185765542] [2022-02-24 02:46:30,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [185765542] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:30,974 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:30,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:46:30,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656150098] [2022-02-24 02:46:30,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:30,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:46:30,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:46:30,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:46:30,975 INFO L87 Difference]: Start difference. First operand 617 states and 740 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:46:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:32,071 INFO L93 Difference]: Finished difference Result 805 states and 969 transitions. [2022-02-24 02:46:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:46:32,072 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 65 [2022-02-24 02:46:32,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:32,074 INFO L225 Difference]: With dead ends: 805 [2022-02-24 02:46:32,074 INFO L226 Difference]: Without dead ends: 728 [2022-02-24 02:46:32,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:46:32,075 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 204 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:32,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 95 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:46:32,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-02-24 02:46:32,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 548. [2022-02-24 02:46:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 521 states have (on average 1.182341650671785) internal successors, (616), 531 states have internal predecessors, (616), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-24 02:46:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 650 transitions. [2022-02-24 02:46:32,472 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 650 transitions. Word has length 65 [2022-02-24 02:46:32,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:32,472 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 650 transitions. [2022-02-24 02:46:32,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 02:46:32,472 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 650 transitions. [2022-02-24 02:46:32,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 02:46:32,473 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:32,473 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:32,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 02:46:32,474 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:32,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:32,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1181046921, now seen corresponding path program 1 times [2022-02-24 02:46:32,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:32,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684127536] [2022-02-24 02:46:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:32,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:32,477 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:32,477 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:33,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:33,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-24 02:46:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:33,391 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:33,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684127536] [2022-02-24 02:46:33,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [684127536] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:33,391 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:33,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 02:46:33,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820369084] [2022-02-24 02:46:33,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:33,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 02:46:33,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:33,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 02:46:33,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 02:46:33,392 INFO L87 Difference]: Start difference. First operand 548 states and 650 transitions. Second operand has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:37,510 INFO L93 Difference]: Finished difference Result 747 states and 882 transitions. [2022-02-24 02:46:37,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-24 02:46:37,510 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-24 02:46:37,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:37,512 INFO L225 Difference]: With dead ends: 747 [2022-02-24 02:46:37,512 INFO L226 Difference]: Without dead ends: 745 [2022-02-24 02:46:37,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1857, Invalid=11025, Unknown=0, NotChecked=0, Total=12882 [2022-02-24 02:46:37,514 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 290 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 2264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:37,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 116 Invalid, 2264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:46:37,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-02-24 02:46:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 590. [2022-02-24 02:46:37,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 562 states have (on average 1.1743772241992882) internal successors, (660), 572 states have internal predecessors, (660), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (17), 8 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 02:46:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 696 transitions. [2022-02-24 02:46:37,932 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 696 transitions. Word has length 64 [2022-02-24 02:46:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:37,932 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 696 transitions. [2022-02-24 02:46:37,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 696 transitions. [2022-02-24 02:46:37,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 02:46:37,933 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:37,934 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:37,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 02:46:37,934 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:37,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:37,934 INFO L85 PathProgramCache]: Analyzing trace with hash 968751897, now seen corresponding path program 4 times [2022-02-24 02:46:37,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:37,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660538573] [2022-02-24 02:46:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:37,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:37,937 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:37,937 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:38,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:38,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-24 02:46:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:38,801 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:38,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660538573] [2022-02-24 02:46:38,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1660538573] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:38,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:38,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 02:46:38,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472587318] [2022-02-24 02:46:38,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:38,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 02:46:38,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:38,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 02:46:38,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 02:46:38,802 INFO L87 Difference]: Start difference. First operand 590 states and 696 transitions. Second operand has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:40,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:40,870 INFO L93 Difference]: Finished difference Result 638 states and 748 transitions. [2022-02-24 02:46:40,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 02:46:40,871 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-24 02:46:40,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:40,873 INFO L225 Difference]: With dead ends: 638 [2022-02-24 02:46:40,873 INFO L226 Difference]: Without dead ends: 622 [2022-02-24 02:46:40,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=604, Invalid=4798, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 02:46:40,874 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 144 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:40,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 125 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:46:40,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-02-24 02:46:41,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 551. [2022-02-24 02:46:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 523 states have (on average 1.1778202676864244) internal successors, (616), 533 states have internal predecessors, (616), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (17), 8 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 02:46:41,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 652 transitions. [2022-02-24 02:46:41,265 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 652 transitions. Word has length 64 [2022-02-24 02:46:41,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:41,265 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 652 transitions. [2022-02-24 02:46:41,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:46:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 652 transitions. [2022-02-24 02:46:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 02:46:41,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:41,267 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:41,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 02:46:41,267 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:41,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:41,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1602966465, now seen corresponding path program 7 times [2022-02-24 02:46:41,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:41,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739754492] [2022-02-24 02:46:41,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:41,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:41,270 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:41,270 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:41,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:41,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 02:46:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:41,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 02:46:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:41,733 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:41,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739754492] [2022-02-24 02:46:41,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [739754492] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:41,734 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:41,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 02:46:41,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867428481] [2022-02-24 02:46:41,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:41,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 02:46:41,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:41,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 02:46:41,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:46:41,735 INFO L87 Difference]: Start difference. First operand 551 states and 652 transitions. Second operand has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:43,150 INFO L93 Difference]: Finished difference Result 627 states and 745 transitions. [2022-02-24 02:46:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 02:46:43,150 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 65 [2022-02-24 02:46:43,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:43,152 INFO L225 Difference]: With dead ends: 627 [2022-02-24 02:46:43,152 INFO L226 Difference]: Without dead ends: 625 [2022-02-24 02:46:43,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 02:46:43,153 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 174 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:43,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 99 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:46:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-02-24 02:46:43,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 579. [2022-02-24 02:46:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 545 states have (on average 1.1743119266055047) internal successors, (640), 557 states have internal predecessors, (640), 24 states have call successors, (24), 10 states have call predecessors, (24), 9 states have return successors, (22), 11 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-24 02:46:43,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 686 transitions. [2022-02-24 02:46:43,580 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 686 transitions. Word has length 65 [2022-02-24 02:46:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:43,581 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 686 transitions. [2022-02-24 02:46:43,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 686 transitions. [2022-02-24 02:46:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 02:46:43,582 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:43,582 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:43,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 02:46:43,582 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:43,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:43,582 INFO L85 PathProgramCache]: Analyzing trace with hash 873252058, now seen corresponding path program 5 times [2022-02-24 02:46:43,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:43,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104864023] [2022-02-24 02:46:43,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:43,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:43,584 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:43,584 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:44,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:44,311 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:44,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104864023] [2022-02-24 02:46:44,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1104864023] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:44,312 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:44,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:46:44,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542313678] [2022-02-24 02:46:44,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:44,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:46:44,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:44,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:46:44,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:46:44,313 INFO L87 Difference]: Start difference. First operand 579 states and 686 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 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 02:46:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:46,002 INFO L93 Difference]: Finished difference Result 704 states and 838 transitions. [2022-02-24 02:46:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 02:46:46,002 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 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 64 [2022-02-24 02:46:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:46,004 INFO L225 Difference]: With dead ends: 704 [2022-02-24 02:46:46,004 INFO L226 Difference]: Without dead ends: 638 [2022-02-24 02:46:46,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=366, Invalid=2184, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 02:46:46,005 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 154 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:46,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 58 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:46:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-02-24 02:46:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 595. [2022-02-24 02:46:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 561 states have (on average 1.1729055258467023) internal successors, (658), 573 states have internal predecessors, (658), 24 states have call successors, (24), 10 states have call predecessors, (24), 9 states have return successors, (22), 11 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-24 02:46:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 704 transitions. [2022-02-24 02:46:46,477 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 704 transitions. Word has length 64 [2022-02-24 02:46:46,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:46,477 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 704 transitions. [2022-02-24 02:46:46,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 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 02:46:46,477 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 704 transitions. [2022-02-24 02:46:46,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 02:46:46,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:46,479 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:46,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 02:46:46,479 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:46,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:46,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1868426852, now seen corresponding path program 6 times [2022-02-24 02:46:46,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:46,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210576176] [2022-02-24 02:46:46,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:46,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:46,481 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:46,481 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:47,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:47,280 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:47,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210576176] [2022-02-24 02:46:47,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [210576176] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:47,280 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:47,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 02:46:47,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961803701] [2022-02-24 02:46:47,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:47,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 02:46:47,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:47,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 02:46:47,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:46:47,281 INFO L87 Difference]: Start difference. First operand 595 states and 704 transitions. Second operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 02:46:51,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:51,967 INFO L93 Difference]: Finished difference Result 852 states and 1015 transitions. [2022-02-24 02:46:51,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-24 02:46:51,967 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 02:46:51,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:51,970 INFO L225 Difference]: With dead ends: 852 [2022-02-24 02:46:51,970 INFO L226 Difference]: Without dead ends: 850 [2022-02-24 02:46:51,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5398 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1924, Invalid=14078, Unknown=0, NotChecked=0, Total=16002 [2022-02-24 02:46:51,972 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 465 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:51,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 98 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 02:46:51,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-02-24 02:46:52,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 615. [2022-02-24 02:46:52,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 579 states have (on average 1.1744386873920554) internal successors, (680), 592 states have internal predecessors, (680), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 11 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-24 02:46:52,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 728 transitions. [2022-02-24 02:46:52,460 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 728 transitions. Word has length 64 [2022-02-24 02:46:52,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:52,460 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 728 transitions. [2022-02-24 02:46:52,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 02:46:52,460 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 728 transitions. [2022-02-24 02:46:52,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 02:46:52,461 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:52,461 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:52,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 02:46:52,461 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1566333674, now seen corresponding path program 6 times [2022-02-24 02:46:52,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:52,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077775859] [2022-02-24 02:46:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:52,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:52,464 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:52,464 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:53,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:53,021 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:53,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077775859] [2022-02-24 02:46:53,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2077775859] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:53,022 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:53,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 02:46:53,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853937817] [2022-02-24 02:46:53,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:53,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 02:46:53,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:53,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 02:46:53,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:46:53,023 INFO L87 Difference]: Start difference. First operand 615 states and 728 transitions. Second operand has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:54,907 INFO L93 Difference]: Finished difference Result 931 states and 1115 transitions. [2022-02-24 02:46:54,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 02:46:54,907 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 02:46:54,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:54,910 INFO L225 Difference]: With dead ends: 931 [2022-02-24 02:46:54,910 INFO L226 Difference]: Without dead ends: 775 [2022-02-24 02:46:54,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=644, Invalid=2662, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 02:46:54,911 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 196 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:54,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 86 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:46:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-02-24 02:46:55,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 646. [2022-02-24 02:46:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 610 states have (on average 1.180327868852459) internal successors, (720), 623 states have internal predecessors, (720), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 11 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-24 02:46:55,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 768 transitions. [2022-02-24 02:46:55,411 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 768 transitions. Word has length 64 [2022-02-24 02:46:55,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:55,411 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 768 transitions. [2022-02-24 02:46:55,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:55,411 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 768 transitions. [2022-02-24 02:46:55,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 02:46:55,412 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:55,412 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:55,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 02:46:55,412 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:55,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:55,412 INFO L85 PathProgramCache]: Analyzing trace with hash 998054042, now seen corresponding path program 7 times [2022-02-24 02:46:55,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:55,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225942745] [2022-02-24 02:46:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:55,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:55,415 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:55,415 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:56,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:56,180 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:56,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225942745] [2022-02-24 02:46:56,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1225942745] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:56,181 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:56,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 02:46:56,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906994341] [2022-02-24 02:46:56,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:56,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 02:46:56,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:56,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 02:46:56,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:46:56,182 INFO L87 Difference]: Start difference. First operand 646 states and 768 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:58,272 INFO L93 Difference]: Finished difference Result 818 states and 971 transitions. [2022-02-24 02:46:58,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 02:46:58,273 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 02:46:58,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:58,275 INFO L225 Difference]: With dead ends: 818 [2022-02-24 02:46:58,275 INFO L226 Difference]: Without dead ends: 727 [2022-02-24 02:46:58,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=532, Invalid=4024, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 02:46:58,276 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 217 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:58,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 69 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:46:58,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-02-24 02:46:58,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 664. [2022-02-24 02:46:58,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 626 states have (on average 1.1805111821086263) internal successors, (739), 640 states have internal predecessors, (739), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 11 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-24 02:46:58,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 789 transitions. [2022-02-24 02:46:58,775 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 789 transitions. Word has length 64 [2022-02-24 02:46:58,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:58,776 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 789 transitions. [2022-02-24 02:46:58,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 789 transitions. [2022-02-24 02:46:58,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 02:46:58,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:58,777 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:58,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 02:46:58,778 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:58,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:58,778 INFO L85 PathProgramCache]: Analyzing trace with hash -777241936, now seen corresponding path program 2 times [2022-02-24 02:46:58,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:58,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245822065] [2022-02-24 02:46:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:58,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:58,781 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:46:58,781 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:46:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 02:46:58,814 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-24 02:46:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 02:46:58,877 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-24 02:46:58,877 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-24 02:46:58,880 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 02:46:58,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 02:46:58,884 INFO L732 BasicCegarLoop]: Path program histogram: [7, 7, 6, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1] [2022-02-24 02:46:58,887 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 02:46:58,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 02:46:58 BoogieIcfgContainer [2022-02-24 02:46:58,905 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 02:46:58,906 INFO L158 Benchmark]: Toolchain (without parser) took 97330.64ms. Allocated memory was 183.5MB in the beginning and 533.7MB in the end (delta: 350.2MB). Free memory was 127.1MB in the beginning and 202.4MB in the end (delta: -75.2MB). Peak memory consumption was 275.3MB. Max. memory is 8.0GB. [2022-02-24 02:46:58,906 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 183.5MB. Free memory is still 143.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 02:46:58,906 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.27ms. Allocated memory was 183.5MB in the beginning and 256.9MB in the end (delta: 73.4MB). Free memory was 126.9MB in the beginning and 230.8MB in the end (delta: -103.9MB). Peak memory consumption was 15.3MB. Max. memory is 8.0GB. [2022-02-24 02:46:58,906 INFO L158 Benchmark]: Boogie Preprocessor took 48.32ms. Allocated memory is still 256.9MB. Free memory was 230.5MB in the beginning and 229.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-24 02:46:58,906 INFO L158 Benchmark]: RCFGBuilder took 374.03ms. Allocated memory is still 256.9MB. Free memory was 229.1MB in the beginning and 216.9MB in the end (delta: 12.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-24 02:46:58,906 INFO L158 Benchmark]: TraceAbstraction took 96642.11ms. Allocated memory was 256.9MB in the beginning and 533.7MB in the end (delta: 276.8MB). Free memory was 216.5MB in the beginning and 202.4MB in the end (delta: 14.2MB). Peak memory consumption was 291.9MB. Max. memory is 8.0GB. [2022-02-24 02:46:58,907 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 183.5MB. Free memory is still 143.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 260.27ms. Allocated memory was 183.5MB in the beginning and 256.9MB in the end (delta: 73.4MB). Free memory was 126.9MB in the beginning and 230.8MB in the end (delta: -103.9MB). Peak memory consumption was 15.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 48.32ms. Allocated memory is still 256.9MB. Free memory was 230.5MB in the beginning and 229.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 374.03ms. Allocated memory is still 256.9MB. Free memory was 229.1MB in the beginning and 216.9MB in the end (delta: 12.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 96642.11ms. Allocated memory was 256.9MB in the beginning and 533.7MB in the end (delta: 276.8MB). Free memory was 216.5MB in the beginning and 202.4MB in the end (delta: 14.2MB). Peak memory consumption was 291.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int SIZE=__VERIFIER_nondet_uint(); [L15] int i, j, k, key; [L16] int v[SIZE]; [L17] j=0 [L17] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND FALSE !(i<2) [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND TRUE i<2 [L24] EXPR v[i] [L24] v[i+1] = v[i] [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND FALSE !(j